{"id":770,"date":"2026-02-23T22:09:00","date_gmt":"2026-02-23T14:09:00","guid":{"rendered":"https:\/\/blog.itsmygo.uk\/2026\/02\/23\/%e3%80%90%e7%b3%bb%e7%b5%b1%e8%a8%ad%e8%a8%88-20-%e6%a6%82%e5%bf%b5%e3%80%9103-%e6%93%b4%e5%b1%95%e8%88%87%e6%95%88%e8%83%bd-scaling%e3%80%81load-balancer%e3%80%81cdn%e3%80%81caching\/"},"modified":"2026-02-23T22:09:00","modified_gmt":"2026-02-23T14:09:00","slug":"%e3%80%90%e7%b3%bb%e7%b5%b1%e8%a8%ad%e8%a8%88-20-%e6%a6%82%e5%bf%b5%e3%80%9103-%e6%93%b4%e5%b1%95%e8%88%87%e6%95%88%e8%83%bd-scaling%e3%80%81load-balancer%e3%80%81cdn%e3%80%81caching","status":"publish","type":"post","link":"https:\/\/blog.itsmygo.uk\/wordpress\/2026\/02\/23\/%e3%80%90%e7%b3%bb%e7%b5%b1%e8%a8%ad%e8%a8%88-20-%e6%a6%82%e5%bf%b5%e3%80%9103-%e6%93%b4%e5%b1%95%e8%88%87%e6%95%88%e8%83%bd-scaling%e3%80%81load-balancer%e3%80%81cdn%e3%80%81caching\/","title":{"rendered":"\u3010\u7cfb\u7d71\u8a2d\u8a08 20 \u6982\u5ff5\u3011#03 \u64f4\u5c55\u8207\u6548\u80fd \u2014 Scaling\u3001Load Balancer\u3001CDN\u3001Caching"},"content":{"rendered":"\n<div id=\"quiz-74d5f79b\">\n<style>\n#quiz-74d5f79b .question {\n        background: white;\n        border-radius: 8px;\n        padding: 20px;\n        margin: 20px 0;\n        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);\n      }#quiz-74d5f79b .question h3 {\n        margin-top: 0;\n        color: #333;\n      }#quiz-74d5f79b .options {\n        list-style: none;\n        padding: 0;\n      }#quiz-74d5f79b .options li {\n        padding: 12px 15px;\n        margin: 8px 0;\n        border: 2px solid #ddd;\n        border-radius: 6px;\n        cursor: pointer;\n        transition: all 0.2s;\n      }#quiz-74d5f79b .options li:hover:not(.disabled) {\n        border-color: #4caf50;\n        background: #f0fff0;\n      }#quiz-74d5f79b .options li.correct {\n        border-color: #4caf50;\n        background: #e8f5e9;\n      }#quiz-74d5f79b .options li.wrong {\n        border-color: #f44336;\n        background: #ffebee;\n      }#quiz-74d5f79b .options li.disabled {\n        cursor: default;\n        opacity: 0.7;\n      }#quiz-74d5f79b .options li.show-answer {\n        border-color: #4caf50;\n        background: #e8f5e9;\n      }#quiz-74d5f79b .feedback {\n        margin-top: 15px;\n        padding: 12px;\n        border-radius: 6px;\n        display: none;\n      }#quiz-74d5f79b .feedback.correct {\n        background: #e8f5e9;\n        color: #2e7d32;\n        display: block;\n      }#quiz-74d5f79b .feedback.wrong {\n        background: #ffebee;\n        color: #c62828;\n        display: block;\n      }#quiz-74d5f79b .score {\n        text-align: center;\n        font-size: 1.5em;\n        padding: 20px;\n        background: white;\n        border-radius: 8px;\n        margin-top: 20px;\n      }#quiz-74d5f79b .code-block {\n        background: #1e1e1e;\n        color: #d4d4d4;\n        padding: 14px;\n        border-radius: 6px;\n        font-family: \"Monaco\", \"Consolas\", \"Courier New\", monospace;\n        font-size: 0.9em;\n        overflow-x: auto;\n        margin: 12px 0;\n        white-space: pre-wrap;\n      }\n<\/style>\n<h1>\u6e2c\u9a57\uff1a\u64f4\u5c55\u8207\u6548\u80fd \u2014 Scaling\u3001Load Balancer\u3001CDN\u3001Caching<\/h1>\n    <p>\u5171 5 \u984c\uff0c\u9ede\u9078\u7b54\u6848\u5f8c\u6703\u7acb\u5373\u986f\u793a\u7d50\u679c<\/p>\n\n    <div class=\"question\" id=\"q1\">\n      <h3>1. Vertical Scaling\uff08\u5782\u76f4\u64f4\u5c55\uff09\u7684\u4e3b\u8981\u7f3a\u9ede\u662f\u4ec0\u9ebc\uff1f<\/h3>\n      <ul class=\"options\">\n        <li onclick=\"checkAnswer(1, 'A', 'C')\">A. \u9700\u8981\u4fee\u6539\u7a0b\u5f0f\u78bc\u624d\u80fd\u904b\u4f5c<\/li>\n        <li onclick=\"checkAnswer(1, 'B', 'C')\">B. \u8cbb\u7528\u4e00\u5b9a\u6bd4\u6c34\u5e73\u64f4\u5c55\u9ad8<\/li>\n        <li onclick=\"checkAnswer(1, 'C', 'C')\">C. \u6709\u786c\u9ad4\u4e0a\u9650\u4e14\u5b58\u5728\u55ae\u9ede\u6545\u969c\u98a8\u96aa<\/li>\n        <li onclick=\"checkAnswer(1, 'D', 'C')\">D. \u9700\u8981\u642d\u914d Load Balancer \u624d\u80fd\u4f7f\u7528<\/li>\n      <\/ul>\n      <div class=\"feedback\" id=\"fb1\"><\/div>\n    <\/div>\n\n    <div class=\"question\" id=\"q2\">\n      <h3>2. CDN \u6700\u9069\u5408\u7528\u4f86\u5feb\u53d6\u54ea\u4e00\u985e\u8cc7\u6e90\uff1f<\/h3>\n      <ul class=\"options\">\n        <li onclick=\"checkAnswer(2, 'A', 'B')\">A. \u4f7f\u7528\u8005\u7684\u8cfc\u7269\u8eca\u5167\u5bb9<\/li>\n        <li onclick=\"checkAnswer(2, 'B', 'B')\">B. \u5716\u7247\u3001CSS\u3001JavaScript \u7b49\u975c\u614b\u6a94\u6848<\/li>\n        <li onclick=\"checkAnswer(2, 'C', 'B')\">C. \u5373\u6642\u804a\u5929\u8a0a\u606f<\/li>\n        <li onclick=\"checkAnswer(2, 'D', 'B')\">D. \u4f7f\u7528\u8005\u500b\u4eba\u8cc7\u6599\u9801\u9762<\/li>\n      <\/ul>\n      <div class=\"feedback\" id=\"fb2\"><\/div>\n    <\/div>\n\n    <div class=\"question\" id=\"q3\">\n      <h3>3. Load Balancer \u4f7f\u7528 Least Connections \u7b56\u7565\u6642\uff0c\u65b0\u7684\u8acb\u6c42\u6703\u88ab\u5206\u914d\u5230\u54ea\u88e1\uff1f<\/h3>\n      <ul class=\"options\">\n        <li onclick=\"checkAnswer(3, 'A', 'D')\">A. \u6700\u8fd1\u4e00\u6b21\u8655\u7406\u5b8c\u8acb\u6c42\u7684\u4f3a\u670d\u5668<\/li>\n        <li onclick=\"checkAnswer(3, 'B', 'D')\">B. \u4f9d\u7167\u56fa\u5b9a\u9806\u5e8f\u8f2a\u6d41\u5206\u914d<\/li>\n        <li onclick=\"checkAnswer(3, 'C', 'D')\">C. \u6839\u64da\u4f7f\u7528\u8005 IP \u6c7a\u5b9a\u7684\u56fa\u5b9a\u4f3a\u670d\u5668<\/li>\n        <li onclick=\"checkAnswer(3, 'D', 'D')\">D. \u76ee\u524d\u6b63\u5728\u8655\u7406\u6700\u5c11\u8acb\u6c42\u7684\u4f3a\u670d\u5668<\/li>\n      <\/ul>\n      <div class=\"feedback\" id=\"fb3\"><\/div>\n    <\/div>\n\n    <div class=\"question\" id=\"q4\">\n      <h3>4. \u5728\u4e0b\u9762\u7684 Redis \u5feb\u53d6\u7a0b\u5f0f\u78bc\u4e2d\uff0c<code>ex=3600<\/code> \u7684\u4f5c\u7528\u662f\u4ec0\u9ebc\uff1f<\/h3>\n      <div class=\"code-block\">cache.set(f&#8221;product:{product_id}&#8221;, json.dumps(product), ex=3600)<\/div>\n      <ul class=\"options\">\n        <li onclick=\"checkAnswer(4, 'A', 'B')\">A. \u8a2d\u5b9a\u5feb\u53d6\u7684\u6700\u5927\u5bb9\u91cf\u70ba 3600 \u7b46<\/li>\n        <li onclick=\"checkAnswer(4, 'B', 'B')\">B. \u8a2d\u5b9a\u5feb\u53d6\u5728 3600 \u79d2\uff081 \u5c0f\u6642\uff09\u5f8c\u81ea\u52d5\u904e\u671f<\/li>\n        <li onclick=\"checkAnswer(4, 'C', 'B')\">C. \u8a2d\u5b9a\u5feb\u53d6\u6700\u591a\u88ab\u5b58\u53d6 3600 \u6b21<\/li>\n        <li onclick=\"checkAnswer(4, 'D', 'B')\">D. \u8a2d\u5b9a\u5feb\u53d6\u7684\u512a\u5148\u7d1a\u70ba 3600<\/li>\n      <\/ul>\n      <div class=\"feedback\" id=\"fb4\"><\/div>\n    <\/div>\n\n    <div class=\"question\" id=\"q5\">\n      <h3>5. \u5728\u96fb\u5546\u7db2\u7ad9\u7684\u5b8c\u6574\u67b6\u69cb\u4e2d\uff0cCDN\u3001Load Balancer \u548c Cache \u4e09\u8005\u5354\u4f5c\u5f8c\uff0c\u8cc7\u6599\u5eab\u5be6\u969b\u9700\u8981\u8655\u7406\u7684\u6d41\u91cf\u5927\u7d04\u662f\u539f\u672c\u7684\u591a\u5c11\uff1f<\/h3>\n      <ul class=\"options\">\n        <li onclick=\"checkAnswer(5, 'A', 'C')\">A. \u7d04 50%\uff0c\u56e0\u70ba CDN \u6514\u622a\u4e86\u4e00\u534a\u7684\u8acb\u6c42<\/li>\n        <li onclick=\"checkAnswer(5, 'B', 'C')\">B. \u7d04 20%\uff0c\u56e0\u70ba Load Balancer \u5206\u6563\u4e86\u5927\u90e8\u5206\u6d41\u91cf<\/li>\n        <li onclick=\"checkAnswer(5, 'C', 'C')\">C. \u7d04 2%\uff0c\u56e0\u70ba CDN \u6514\u622a\u975c\u614b\u8acb\u6c42\u3001Cache \u6514\u622a\u5927\u90e8\u5206\u8cc7\u6599\u5eab\u67e5\u8a62<\/li>\n        <li onclick=\"checkAnswer(5, 'D', 'C')\">D. \u7d04 10%\uff0c\u56e0\u70ba\u5feb\u53d6\u6514\u622a\u4e86 90% \u7684\u67e5\u8a62<\/li>\n      <\/ul>\n      <div class=\"feedback\" id=\"fb5\"><\/div>\n    <\/div>\n\n    <div class=\"score\" id=\"score\" style=\"display:none;\"><\/div>\n<script>\n\n      let answered = 0;\n      let correct = 0;\n      const total = 5;\n      const explanations = {\n        1: \"Vertical Scaling \u662f\u5347\u7d1a\u55ae\u53f0\u6a5f\u5668\u7684\u786c\u9ad4\uff08CPU\u3001RAM \u7b49\uff09\uff0c\u512a\u9ede\u662f\u7c21\u55ae\u4e0d\u7528\u6539\u7a0b\u5f0f\u78bc\uff0c\u4f46\u7f3a\u9ede\u662f\u786c\u9ad4\u6709\u5929\u82b1\u677f\uff08\u4e00\u53f0\u6a5f\u5668\u6700\u591a\u5c31\u90a3\u9ebc\u5927\uff09\uff0c\u800c\u4e14\u53ea\u6709\u4e00\u53f0\u6a5f\u5668\u4ee3\u8868\u6709\u55ae\u9ede\u6545\u969c\u98a8\u96aa \u2014 \u9019\u53f0\u639b\u4e86\u5168\u90e8\u639b\u3002Load Balancer \u662f Horizontal Scaling \u624d\u9700\u8981\u642d\u914d\u7684\u3002\",\n        2: \"CDN \u9069\u5408\u5feb\u53d6\u300c\u7d66\u6240\u6709\u4eba\u770b\u90fd\u4e00\u6a23\u300d\u7684\u975c\u614b\u8cc7\u6e90\uff0c\u4f8b\u5982\u5716\u7247\u3001CSS\u3001JavaScript \u6a94\u6848\u3001\u5f71\u7247\u548c\u5b57\u578b\u3002\u8cfc\u7269\u8eca\u3001\u5373\u6642\u8a0a\u606f\u548c\u500b\u4eba\u8cc7\u6599\u90fd\u662f\u52d5\u614b\u5167\u5bb9\uff0c\u6703\u56e0\u4f7f\u7528\u8005\u4e0d\u540c\u800c\u4e0d\u540c\uff0c\u4e0d\u9069\u5408\u653e\u5728 CDN \u4e0a\u3002\",\n        3: \"Least Connections \u7b56\u7565\u6703\u67e5\u770b\u6bcf\u53f0\u4f3a\u670d\u5668\u76ee\u524d\u6b63\u5728\u8655\u7406\u7684\u9023\u7dda\u6578\u91cf\uff0c\u628a\u65b0\u8acb\u6c42\u5206\u914d\u7d66\u8ca0\u8f09\u6700\u8f15\uff08\u9023\u7dda\u6578\u6700\u5c11\uff09\u7684\u90a3\u53f0\u3002Round Robin \u662f\u4f9d\u7167\u56fa\u5b9a\u9806\u5e8f\u8f2a\u6d41\uff0cIP Hash \u662f\u6839\u64da\u4f7f\u7528\u8005 IP \u5206\u914d\u5230\u56fa\u5b9a\u4f3a\u670d\u5668\u3002\",\n        4: \"<code>ex=3600<\/code> \u4e2d\u7684 ex \u4ee3\u8868 expire\uff08\u904e\u671f\uff09\uff0c3600 \u662f\u79d2\u6578\uff0c\u7b49\u65bc 1 \u5c0f\u6642\u3002\u9019\u8868\u793a\u9019\u7b46\u5feb\u53d6\u8cc7\u6599\u6703\u5728 1 \u5c0f\u6642\u5f8c\u81ea\u52d5\u5f9e Redis \u4e2d\u522a\u9664\uff0c\u4e0b\u6b21\u67e5\u8a62\u5c31\u6703\u91cd\u65b0\u5f9e\u8cc7\u6599\u5eab\u53d6\u5f97\u6700\u65b0\u8cc7\u6599\u3002\u9019\u5c31\u662f TTL\uff08\u5b58\u6d3b\u6642\u9593\uff09\u7b56\u7565\u3002\",\n        5: \"\u6587\u7ae0\u4e2d\u8aaa\u660e\uff1aCDN \u6514\u622a\u4e86\u7d04 80% \u7684\u975c\u614b\u8cc7\u6e90\u8acb\u6c42\uff0c\u5269\u4e0b\u7684\u52d5\u614b\u8acb\u6c42\u4e2d Cache \u518d\u6514\u622a\u7d04 90% \u7684\u8cc7\u6599\u5eab\u67e5\u8a62\u3002\u6240\u4ee5\u8cc7\u6599\u5eab\u5be6\u969b\u53ea\u9700\u8981\u8655\u7406\u539f\u672c\u7d04 2% \u7684\u6d41\u91cf\u3002\u9078\u9805 D \u53ea\u8003\u616e\u4e86 Cache \u7684\u6548\u679c\uff0c\u6c92\u6709\u8a08\u5165 CDN \u5148\u6514\u622a\u7684\u90e8\u5206\u3002\"\n      };\n\n      function checkAnswer(qNum, selected, correctAns) {\n        const question = document.getElementById(\"q\" + qNum);\n        if (question.classList.contains(\"answered\")) return;\n\n        question.classList.add(\"answered\");\n        answered++;\n\n        const options = question.querySelectorAll(\".options li\");\n        options.forEach((opt) => {\n          opt.classList.add(\"disabled\");\n          if (opt.textContent.startsWith(correctAns + \".\")) {\n            opt.classList.add(\"show-answer\");\n          }\n        });\n\n        const feedback = document.getElementById(\"fb\" + qNum);\n        if (selected === correctAns) {\n          correct++;\n          feedback.className = \"feedback correct\";\n          feedback.innerHTML = \"&#10003; \u6b63\u78ba\uff01\" + explanations[qNum];\n        } else {\n          feedback.className = \"feedback wrong\";\n          feedback.innerHTML =\n            \"&#10007; \u932f\u8aa4\u3002\u6b63\u78ba\u7b54\u6848\u662f \" + correctAns + \"\u3002\" + explanations[qNum];\n          options.forEach((opt) => {\n            if (opt.textContent.startsWith(selected + \".\")) {\n              opt.classList.add(\"wrong\");\n            }\n          });\n        }\n\n        if (answered === total) {\n          const scoreDiv = document.getElementById(\"score\");\n          scoreDiv.style.display = \"block\";\n          scoreDiv.innerHTML =\n            \"\u6e2c\u9a57\u5b8c\u6210\uff01\u5f97\u5206\uff1a\" +\n            correct +\n            \" \/ \" +\n            total +\n            (correct === total\n              ? \" \ud83c\udf89 \u5168\u5c0d\uff01\"\n              : correct >= Math.ceil(total * 0.6)\n                ? \" \ud83d\udc4d \u4e0d\u932f\uff01\"\n                : \" \ud83d\udcda \u518d\u8907\u7fd2\u4e00\u4e0b\u5427\");\n        }\n      }\n    \n<\/script>\n<\/div>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u672c\u7bc7\u662f\u300c\u7cfb\u7d71\u8a2d\u8a08 20 \u6982\u5ff5\u300d\u7cfb\u5217\u7b2c 3 \u7bc7\uff0c\u5171 5 \u7bc7\u3002<br>\u96e3\u5ea6\uff1aL2-\u9032\u968e \uff5c \u524d\u7f6e\u77e5\u8b58\uff1a\u7b2c 1 \u7bc7\u7684\u7db2\u8def\u57fa\u790e\uff08IP\u3001HTTP\uff09<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u53e5\u8a71\u8aaa\u660e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7576\u4f7f\u7528\u8005\u66b4\u589e\u3001\u4f3a\u670d\u5668\u6490\u4e0d\u4f4f\u6642\uff0c\u6211\u5011\u6709\u56db\u7a2e\u6b66\u5668\uff1a\u52a0\u5927\u6a5f\u5668\u3001\u589e\u52a0\u6a5f\u5668\u3001\u628a\u5167\u5bb9\u653e\u8fd1\u4e00\u9ede\u3001\u628a\u7d50\u679c\u8a18\u8d77\u4f86\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u554f\u984c\u5834\u666f\uff1a\u96d9 11 \u4f60\u7684\u7db2\u7ad9\u639b\u4e86<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u60f3\u50cf\u4f60\u7d93\u71df\u4e00\u500b\u96fb\u5546\u7db2\u7ad9\uff0c\u5e73\u5e38\u6bcf\u79d2 100 \u500b\u8acb\u6c42\uff0c\u4e00\u5207\u6b63\u5e38\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u96d9 11 \u4f86\u4e86\uff0c\u6bcf\u79d2 10,000 \u500b\u8acb\u6c42\u6e67\u5165\u3002\u4f60\u7684\u55ae\u53f0\u4f3a\u670d\u5668\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>CPU \u98c6\u5230 100%<\/li>\n\n\n<li>\u8a18\u61b6\u9ad4\u7528\u5149<\/li>\n\n\n<li>\u8cc7\u6599\u5eab\u9023\u7dda\u6578\u7206\u6eff<\/li>\n\n\n<li>\u4f7f\u7528\u8005\u770b\u5230 502 Bad Gateway<\/li>\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u600e\u9ebc\u8fa6\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9019\u7bc7\u8981\u8b1b\u7684\u56db\u500b\u6982\u5ff5\uff0c\u5c31\u662f\u89e3\u6c7a\u9019\u500b\u554f\u984c\u7684\u56db\u628a\u9470\u5319\u3002\u5148\u770b\u4e00\u4e0b\u5b83\u5011\u5728\u67b6\u69cb\u4e2d\u7684\u4f4d\u7f6e\uff1a<\/p>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">\u4f7f\u7528\u8005\uff08\u53f0\u5317\uff09  \u4f7f\u7528\u8005\uff08\u9ad8\u96c4\uff09  \u4f7f\u7528\u8005\uff08\u6771\u4eac\uff09\n     |              |              |\n     v              v              v\n  &#91; CDN \u908a\u7de3\u7bc0\u9ede \u2014 \u975c\u614b\u8cc7\u6e90\u76f4\u63a5\u56de\u61c9 ]     \u2190 (3) CDN\n     |\n     v\n  &#91; Load Balancer \u2014 \u5206\u914d\u6d41\u91cf ]            \u2190 (2) Load Balancer\n     |         |         |\n     v         v         v\n  Server A  Server B  Server C           \u2190 (1) Horizontal Scaling\n     |         |         |\n     v         v         v\n  &#91;    Cache \u5c64\uff08Redis\uff09   ]              \u2190 (4) Caching\n     |\n     v\n  &#91; Database ]\n<\/code><\/span><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u4f86\u9010\u4e00\u62c6\u89e3\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u6982\u5ff5 1\uff1aScaling\uff08\u64f4\u5c55\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e00\u53e5\u8a71\u7ffb\u8b6f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f3a\u670d\u5668\u625b\u4e0d\u4f4f\u4e86\uff0c\u8981\u561b\u63db\u66f4\u5927\u53f0\uff0c\u8981\u561b\u591a\u53eb\u5e7e\u53f0\u4f86\u5e6b\u5fd9\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5169\u7a2e\u64f4\u5c55\u65b9\u5f0f<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Vertical Scaling\uff08\u5782\u76f4\u64f4\u5c55\uff09= \u5347\u7d1a\u55ae\u53f0\u6a5f\u5668<\/h4>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">\u5347\u7d1a\u524d\uff1a          \u5347\u7d1a\u5f8c\uff1a\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510     \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 4 CPU    \u2502 \u2192\u2192\u2192 \u2502 32 CPU       \u2502\n\u2502 8GB RAM  \u2502     \u2502 128GB RAM    \u2502\n\u2502 500GB SSD\u2502     \u2502 2TB NVMe SSD \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518     \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n   \u820a\u6a5f\u5668            \u65b0\u731b\u7378\n<\/code><\/span><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u767d\u8a71\u7ffb\u8b6f<\/strong>\uff1a\u628a\u4f60\u7684\u7b46\u96fb\u63db\u6210\u5de5\u4f5c\u7ad9\u3002CPU \u52a0\u5927\u3001\u8a18\u61b6\u9ad4\u52a0\u591a\u3001\u786c\u789f\u63db\u5feb\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u512a\u9ede<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>\u6700\u7c21\u55ae\uff0c\u4e0d\u7528\u6539\u7a0b\u5f0f\u78bc<\/li>\n\n\n<li>\u4e0d\u7528\u8655\u7406\u591a\u53f0\u6a5f\u5668\u7684\u5354\u8abf\u554f\u984c<\/li>\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7f3a\u9ede<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>\u6709\u5929\u82b1\u677f\uff08\u4e00\u53f0\u6a5f\u5668\u6700\u591a\u5c31\u90a3\u9ebc\u5927\uff09<\/li>\n\n\n<li>\u55ae\u9ede\u6545\u969c \u2014 \u9019\u53f0\u639b\u4e86\uff0c\u5168\u90e8\u639b<\/li>\n\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Horizontal Scaling\uff08\u6c34\u5e73\u64f4\u5c55\uff09= \u591a\u53eb\u5e7e\u53f0\u4f86<\/h4>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">\u64f4\u5c55\u524d\uff1a          \u64f4\u5c55\u5f8c\uff1a\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510     \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 Server   \u2502 \u2192\u2192\u2192 \u2502 Server A \u2502 \u2502 Server B \u2502 \u2502 Server C \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518     \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n   \u4e00\u53f0\u625b            \u4e09\u53f0\u5206\u8457\u625b\n<\/code><\/span><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u767d\u8a71\u7ffb\u8b6f<\/strong>\uff1a\u642c\u5bb6\u592a\u91cd\uff1f\u4e0d\u662f\u627e\u4e00\u500b\u5927\u529b\u58eb\uff0c\u800c\u662f\u591a\u53eb\u5e7e\u500b\u4eba\u4e00\u8d77\u642c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u512a\u9ede<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>\u7406\u8ad6\u4e0a\u7121\u4e0a\u9650\uff08\u4e0d\u5920\u5c31\u518d\u52a0\uff09<\/li>\n\n\n<li>\u4e00\u53f0\u58de\u4e86\u9084\u6709\u5176\u4ed6\u53f0\u9802\u8457<\/li>\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7f3a\u9ede<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>\u7a0b\u5f0f\u8981\u80fd\u8dd1\u5728\u591a\u53f0\u6a5f\u5668\u4e0a\uff08\u4e0d\u80fd\u628a\u8cc7\u6599\u5b58\u5728\u672c\u5730\uff09<\/li>\n\n\n<li>\u9700\u8981\u6709\u4eba\u300c\u5206\u914d\u5de5\u4f5c\u300d\u2014 \u9019\u5c31\u662f\u4e0b\u9762\u7684 Load Balancer<\/li>\n\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5fc5\u770b\u61c2 vs \u77e5\u9053\u5c31\u597d<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<thead>\n<tr>\n<th>\u6982\u5ff5<\/th>\n<th>\u91cd\u8981\u6027<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Vertical = \u5347\u7d1a\u55ae\u53f0<\/td>\n<td>\u5fc5\u770b\u61c2<\/td>\n<\/tr>\n<tr>\n<td>Horizontal = \u52a0\u6a5f\u5668<\/td>\n<td>\u5fc5\u770b\u61c2<\/td>\n<\/tr>\n<tr>\n<td>Vertical \u6709\u5929\u82b1\u677f<\/td>\n<td>\u5fc5\u770b\u61c2<\/td>\n<\/tr>\n<tr>\n<td>Horizontal \u9700\u8981 stateless \u8a2d\u8a08<\/td>\n<td>\u77e5\u9053\u5c31\u597d\uff0c\u9047\u5230\u518d\u67e5<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u9762\u8a66\u600e\u9ebc\u554f<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u300c\u4f60\u7684\u7cfb\u7d71\u4f7f\u7528\u8005\u5f9e 1 \u842c\u6210\u9577\u5230 100 \u842c\uff0c\u4f60\u6703\u600e\u9ebc\u505a\uff1f\u300d<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u6a19\u6e96\u7b54\u6848\u8d77\u624b\u5f0f\uff1a\u5148 Vertical Scaling \u5230\u5408\u7406\u4e0a\u9650\uff0c\u7136\u5f8c\u8f49 Horizontal Scaling\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u6982\u5ff5 2\uff1aLoad Balancer\uff08\u8ca0\u8f09\u5747\u8861\u5668\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e00\u53e5\u8a71\u7ffb\u8b6f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ad9\u5728\u9580\u53e3\u7684\u4ea4\u901a\u6307\u63ee\uff0c\u628a\u5ba2\u4eba\u5e73\u5747\u5206\u914d\u5230\u4e0d\u540c\u6ac3\u53f0\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5de5\u4f5c\u539f\u7406<\/h3>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">\u6240\u6709\u8acb\u6c42\n    |\n    v\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502  Load Balancer   \u2502   \u2190 \u300c\u4f60\u53bb A\uff0c\u4f60\u53bb B\uff0c\u4f60\u53bb C\u300d\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n    |      |      |\n    v      v      v\n Server  Server  Server\n   A       B       C\n<\/code><\/span><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u6c92\u6709 Load Balancer \u7684\u6642\u5019\uff0c\u6240\u6709\u6d41\u91cf\u6253\u5230\u540c\u4e00\u53f0 Server\u3002\u6709\u4e86\u5b83\uff0c\u6d41\u91cf\u88ab\u5206\u6563\uff0c\u6bcf\u53f0\u4f3a\u670d\u5668\u53ea\u8981\u625b 1\/3\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5e38\u898b\u7684\u5206\u914d\u7b56\u7565<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b56\u7565 1\uff1aRound Robin\uff08\u8f2a\u6d41\uff09<\/h4>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">\u8acb\u6c42 1 \u2192 Server A\n\u8acb\u6c42 2 \u2192 Server B\n\u8acb\u6c42 3 \u2192 Server C\n\u8acb\u6c42 4 \u2192 Server A   \u2190 \u56de\u5230\u7b2c\u4e00\u53f0\uff0c\u7e7c\u7e8c\u8f2a\n\u8acb\u6c42 5 \u2192 Server B\n...\n<\/code><\/span><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u767d\u8a71\u7ffb\u8b6f<\/strong>\uff1a\u6392\u968a\u53eb\u865f\uff0c\u4e00\u4eba\u4e00\u6b21\uff0c\u8f2a\u6d41\u4f86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u7c21\u55ae\u7684\u7b56\u7565\u3002\u554f\u984c\u662f\uff1a\u5982\u679c Server A \u5df2\u7d93\u5f88\u5fd9\u3001Server B \u5f88\u9592\uff0c\u5b83\u4e0d\u6703\u7ba1\uff0c\u7167\u6a23\u8f2a\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b56\u7565 2\uff1aLeast Connections\uff08\u6700\u5c11\u9023\u7dda\uff09<\/h4>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">Server A: \u6b63\u5728\u8655\u7406 15 \u500b\u8acb\u6c42\nServer B: \u6b63\u5728\u8655\u7406 3 \u500b\u8acb\u6c42   \u2190 \u65b0\u8acb\u6c42\u9001\u9019\u88e1\nServer C: \u6b63\u5728\u8655\u7406 10 \u500b\u8acb\u6c42\n<\/code><\/span><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u767d\u8a71\u7ffb\u8b6f<\/strong>\uff1a\u770b\u8ab0\u6700\u9592\u5c31\u6d3e\u7d66\u8ab0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4 Round Robin \u8070\u660e\uff0c\u6703\u770b\u76ee\u524d\u5404\u4f3a\u670d\u5668\u7684\u8ca0\u8f09\u72c0\u6cc1\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b56\u7565 3\uff1aIP Hash\uff08\u4f9d IP \u5206\u914d\uff09<\/h4>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"CSS\" data-shcb-language-slug=\"css\"><span><code class=\"hljs language-css\">\u4f7f\u7528\u8005 <span class=\"hljs-selector-tag\">IP<\/span>: 1<span class=\"hljs-selector-class\">.2<\/span><span class=\"hljs-selector-class\">.3<\/span><span class=\"hljs-selector-class\">.4<\/span>  \u2192 <span class=\"hljs-selector-tag\">hash<\/span> \u2192 \u7d50\u679c: <span class=\"hljs-selector-tag\">A<\/span> \u2192 \u6c38\u9060\u53bb <span class=\"hljs-selector-tag\">Server<\/span> <span class=\"hljs-selector-tag\">A<\/span>\n\u4f7f\u7528\u8005 <span class=\"hljs-selector-tag\">IP<\/span>: 5<span class=\"hljs-selector-class\">.6<\/span><span class=\"hljs-selector-class\">.7<\/span><span class=\"hljs-selector-class\">.8<\/span>  \u2192 <span class=\"hljs-selector-tag\">hash<\/span> \u2192 \u7d50\u679c: <span class=\"hljs-selector-tag\">B<\/span> \u2192 \u6c38\u9060\u53bb <span class=\"hljs-selector-tag\">Server<\/span> <span class=\"hljs-selector-tag\">B<\/span>\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">CSS<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">css<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u767d\u8a71\u7ffb\u8b6f<\/strong>\uff1a\u540c\u4e00\u500b\u5ba2\u4eba\u6c38\u9060\u53bb\u540c\u4e00\u500b\u6ac3\u53f0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9069\u7528\u65bc\u9700\u8981\u300c\u9ecf\u6027 Session\u300d\u7684\u5834\u666f\uff08\u4f8b\u5982\u4f7f\u7528\u8005\u767b\u5165\u72c0\u614b\u5b58\u5728\u7279\u5b9a\u4f3a\u670d\u5668\u4e0a\uff09\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5728\u7a0b\u5f0f\u78bc\u4e2d\u9577\u4ec0\u9ebc\u6a23<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f60\u5982\u679c\u7528 AI \u5354\u52a9\u958b\u767c\uff0c\u53ef\u80fd\u6703\u5728 Nginx \u8a2d\u5b9a\u6a94\u88e1\u770b\u5230\u9019\u6a23\u7684\u5167\u5bb9\uff1a<\/p>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">upstream backend {\n    <span class=\"hljs-comment\"># \u5217\u51fa\u6240\u6709\u5f8c\u7aef\u4f3a\u670d\u5668<\/span>\n    server <span class=\"hljs-number\">10.0<\/span><span class=\"hljs-number\">.0<\/span><span class=\"hljs-number\">.1<\/span>:<span class=\"hljs-number\">8080<\/span>;    <span class=\"hljs-comment\"># Server A<\/span>\n    server <span class=\"hljs-number\">10.0<\/span><span class=\"hljs-number\">.0<\/span><span class=\"hljs-number\">.2<\/span>:<span class=\"hljs-number\">8080<\/span>;    <span class=\"hljs-comment\"># Server B<\/span>\n    server <span class=\"hljs-number\">10.0<\/span><span class=\"hljs-number\">.0<\/span><span class=\"hljs-number\">.3<\/span>:<span class=\"hljs-number\">8080<\/span>;    <span class=\"hljs-comment\"># Server C<\/span>\n}\n\nserver {\n    listen <span class=\"hljs-number\">80<\/span>;                           <span class=\"hljs-comment\"># \u5c0d\u5916\u53ea\u958b\u4e00\u500b\u5165\u53e3<\/span>\n    location \/ {\n        proxy_pass http:<span class=\"hljs-comment\">\/\/backend;       # \u628a\u6d41\u91cf\u8f49\u7d66\u4e0a\u9762\u90a3\u7d44\u4f3a\u670d\u5668<\/span>\n    }\n}\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u9010\u884c\u7ffb\u8b6f<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li><code>upstream backend<\/code> \u2014 \u5b9a\u7fa9\u4e00\u7d44\u5f8c\u7aef\u4f3a\u670d\u5668\uff0c\u53d6\u540d\u53eb backend<\/li>\n\n\n<li><code>server 10.0.0.1:8080<\/code> \u2014 \u7b2c\u4e00\u53f0\u4f3a\u670d\u5668\u7684 IP \u548c port<\/li>\n\n\n<li><code>proxy_pass http:\/\/backend<\/code> \u2014 \u628a\u9032\u4f86\u7684\u8acb\u6c42\u8f49\u767c\u7d66\u90a3\u7d44\u4f3a\u670d\u5668\uff08Nginx \u9810\u8a2d\u7528 Round Robin\uff09<\/li>\n\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u96f2\u7aef\u670d\u52d9\u4e2d\u7684 Load Balancer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u5be6\u969b\u5de5\u4f5c\u4e2d\uff0c\u4f60\u4e0d\u4e00\u5b9a\u6703\u81ea\u5df1\u8a2d\u5b9a Nginx\u3002\u96f2\u7aef\u5e73\u53f0\u90fd\u6709\u73fe\u6210\u7684\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<thead>\n<tr>\n<th>\u96f2\u7aef\u5e73\u53f0<\/th>\n<th>\u670d\u52d9\u540d\u7a31<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>AWS<\/td>\n<td>Elastic Load Balancing (ELB)<\/td>\n<\/tr>\n<tr>\n<td>GCP<\/td>\n<td>Cloud Load Balancing<\/td>\n<\/tr>\n<tr>\n<td>Azure<\/td>\n<td>Azure Load Balancer<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b83\u5011\u505a\u7684\u4e8b\u60c5\u4e00\u6a23 \u2014 \u5206\u914d\u6d41\u91cf\u3002\u5dee\u5225\u5728\u6709\u66f4\u591a\u9032\u968e\u529f\u80fd\uff08\u5065\u5eb7\u6aa2\u67e5\u3001\u81ea\u52d5\u79fb\u9664\u58de\u6389\u7684\u4f3a\u670d\u5668\u7b49\uff09\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u6982\u5ff5 3\uff1aCDN\uff08Content Delivery Network\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e00\u53e5\u8a71\u7ffb\u8b6f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u628a\u4f60\u7684\u5716\u7247\u3001CSS\u3001JS \u8907\u88fd\u5230\u5168\u4e16\u754c\u5404\u5730\u7684\u4f3a\u670d\u5668\uff0c\u8b93\u4f7f\u7528\u8005\u5f9e\u6700\u8fd1\u7684\u5730\u65b9\u62ff\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u70ba\u4ec0\u9ebc\u9700\u8981 CDN<\/h3>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">\u6c92\u6709 CDN\uff1a\n\u6771\u4eac\u4f7f\u7528\u8005 \u2192 (\u6d77\u5e95\u96fb\u7e9c) \u2192 \u7f8e\u570b\u4e3b\u6a5f \u2192 \u56de\u50b3\u5716\u7247\n\u5ef6\u9072: 200ms+\n\n\u6709 CDN\uff1a\n\u6771\u4eac\u4f7f\u7528\u8005 \u2192 \u6771\u4eac\u908a\u7de3\u7bc0\u9ede \u2192 \u76f4\u63a5\u56de\u50b3\u5716\u7247\n\u5ef6\u9072: 20ms\n<\/code><\/span><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u7269\u7406\u8ddd\u96e2\u6c7a\u5b9a\u901f\u5ea6\u3002\u5149\u901f\u662f\u6709\u9650\u7684\uff0c\u5f9e\u6771\u4eac\u5230\u7f8e\u570b\u518d\u56de\u4f86\u5c31\u662f\u6162\u3002CDN \u7684\u89e3\u6cd5\u5f88\u76f4\u89ba\uff1a<strong>\u628a\u6771\u897f\u653e\u5230\u96e2\u4f7f\u7528\u8005\u8fd1\u7684\u5730\u65b9\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">CDN \u7684\u904b\u4f5c\u65b9\u5f0f<\/h3>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">\u7b2c\u4e00\u6b21\u5b58\u53d6\uff08Cache Miss\uff09\uff1a\n\u4f7f\u7528\u8005 \u2192 CDN \u908a\u7de3\u7bc0\u9ede \u2192 \u300c\u6211\u6c92\u6709\u9019\u5f35\u5716\u300d\u2192 \u56de\u6e90\u7ad9\u62ff \u2192 \u5b58\u4e00\u4efd \u2192 \u56de\u50b3\u7d66\u4f7f\u7528\u8005\n\n\u7b2c\u4e8c\u6b21\u5b58\u53d6\uff08Cache Hit\uff09\uff1a\n\u4f7f\u7528\u8005 \u2192 CDN \u908a\u7de3\u7bc0\u9ede \u2192 \u300c\u6211\u6709\uff01\u300d\u2192 \u76f4\u63a5\u56de\u50b3\n<\/code><\/span><\/pre><\/div>\n\n\n<ol class=\"wp-block-list\">\n\n<li>\u4f7f\u7528\u8005\u8acb\u6c42\u4e00\u5f35\u5716\u7247<\/li>\n\n\n<li>CDN \u908a\u7de3\u7bc0\u9ede\u6aa2\u67e5\u81ea\u5df1\u6709\u6c92\u6709<\/li>\n\n\n<li>\u6c92\u6709\uff08Miss\uff09\u2192 \u53bb\u539f\u59cb\u4f3a\u670d\u5668\u62ff\uff0c\u5b58\u4e0b\u4f86\uff0c\u56de\u50b3<\/li>\n\n\n<li>\u6709\uff08Hit\uff09\u2192 \u76f4\u63a5\u56de\u50b3\uff0c\u4e0d\u7528\u554f\u539f\u59cb\u4f3a\u670d\u5668<\/li>\n\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">CDN \u9069\u5408\u653e\u4ec0\u9ebc<\/h3>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"CSS\" data-shcb-language-slug=\"css\"><span><code class=\"hljs language-css\">\u9069\u5408\uff08\u975c\u614b\u3001\u4e0d\u5e38\u8b8a\uff09\uff1a        \u4e0d\u9069\u5408\uff08\u52d5\u614b\u3001\u5e38\u8b8a\uff09\uff1a\n\u2705 \u5716\u7247 (<span class=\"hljs-selector-class\">.jpg<\/span>, <span class=\"hljs-selector-class\">.png<\/span>, <span class=\"hljs-selector-class\">.webp<\/span>)  \u274c \u4f7f\u7528\u8005\u500b\u4eba\u8cc7\u6599\n\u2705 <span class=\"hljs-selector-tag\">CSS<\/span> \u6a23\u5f0f\u6a94                 \u274c \u8cfc\u7269\u8eca\u5167\u5bb9\n\u2705 <span class=\"hljs-selector-tag\">JavaScript<\/span> \u6a94\u6848            \u274c \u5373\u6642\u804a\u5929\u8a0a\u606f\n\u2705 \u5f71\u7247\u4e32\u6d41                   \u274c \u80a1\u7968\u5831\u50f9\n\u2705 \u5b57\u578b\u6a94\u6848\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">CSS<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">css<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5224\u65b7\u539f\u5247<\/strong>\uff1a\u5167\u5bb9\u662f\u300c\u7d66\u6240\u6709\u4eba\u770b\u90fd\u4e00\u6a23\u300d\u7684\uff0c\u5c31\u9069\u5408\u653e CDN\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5728\u7a0b\u5f0f\u78bc\u4e2d\u9577\u4ec0\u9ebc\u6a23<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f60\u5728\u524d\u7aef\u5c08\u6848\u88e1\u53ef\u80fd\u6703\u770b\u5230 CDN \u7684\u5f15\u7528\u65b9\u5f0f\uff1a<\/p>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"hljs-comment\">&lt;!-- \u5f9e CDN \u8f09\u5165 jQuery\uff08\u4e0d\u662f\u5f9e\u81ea\u5df1\u7684\u4f3a\u670d\u5668\uff09 --&gt;<\/span>\n<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">script<\/span> <span class=\"hljs-attr\">src<\/span>=<span class=\"hljs-string\">\"https:\/\/cdn.jsdelivr.net\/npm\/jquery@3.7.1\/dist\/jquery.min.js\"<\/span>&gt;<\/span><span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">script<\/span>&gt;<\/span>\n\n<span class=\"hljs-comment\">&lt;!-- \u5f9e CDN \u8f09\u5165\u5b57\u578b --&gt;<\/span>\n<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">link<\/span> <span class=\"hljs-attr\">href<\/span>=<span class=\"hljs-string\">\"https:\/\/fonts.googleapis.com\/css2?family=Noto+Sans+TC\"<\/span> <span class=\"hljs-attr\">rel<\/span>=<span class=\"hljs-string\">\"stylesheet\"<\/span>&gt;<\/span>\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7ffb\u8b6f<\/strong>\uff1a\u9019\u4e9b\u6a94\u6848\u4e0d\u662f\u653e\u5728\u4f60\u7684\u4f3a\u670d\u5668\u4e0a\uff0c\u800c\u662f\u5f9e CDN \u5168\u7403\u7bc0\u9ede\u8f09\u5165\u3002\u4f7f\u7528\u8005\u6703\u81ea\u52d5\u9023\u5230\u96e2\u4ed6\u6700\u8fd1\u7684\u90a3\u500b\u7bc0\u9ede\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5e38\u898b CDN \u670d\u52d9<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<thead>\n<tr>\n<th>\u670d\u52d9<\/th>\n<th>\u7279\u8272<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Cloudflare<\/td>\n<td>\u514d\u8cbb\u65b9\u6848\u5920\u7528\uff0c\u6700\u591a\u4eba\u7528<\/td>\n<\/tr>\n<tr>\n<td>AWS CloudFront<\/td>\n<td>\u548c AWS \u751f\u614b\u6574\u5408<\/td>\n<\/tr>\n<tr>\n<td>Akamai<\/td>\n<td>\u8001\u724c\uff0c\u4f01\u696d\u7d1a<\/td>\n<\/tr>\n<tr>\n<td>Fastly<\/td>\n<td>\u958b\u767c\u8005\u53cb\u5584\uff0c\u908a\u7de3\u904b\u7b97<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u6982\u5ff5 4\uff1aCaching\uff08\u5feb\u53d6\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e00\u53e5\u8a71\u7ffb\u8b6f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u628a\u4e4b\u524d\u7b97\u904e\u7684\u7d50\u679c\u8a18\u8d77\u4f86\uff0c\u4e0b\u6b21\u76f4\u63a5\u7528\uff0c\u4e0d\u8981\u91cd\u7b97\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u70ba\u4ec0\u9ebc\u9700\u8981\u5feb\u53d6<\/h3>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">\u6c92\u6709\u5feb\u53d6\uff1a\n\u8acb\u6c42 \u2192 \u4f3a\u670d\u5668 \u2192 \u67e5\u8cc7\u6599\u5eab\uff0850ms\uff09\u2192 \u8a08\u7b97\u7d50\u679c\uff0820ms\uff09\u2192 \u56de\u50b3\n\u6bcf\u6b21\u90fd\u8981 70ms\n\n\u6709\u5feb\u53d6\uff1a\n\u8acb\u6c42 \u2192 \u4f3a\u670d\u5668 \u2192 \u67e5\u5feb\u53d6\uff081ms\uff09\u2192 \u6709\uff01\u2192 \u56de\u50b3\n\u53ea\u8981 1ms\n<\/code><\/span><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u540c\u6a23\u7684\u67e5\u8a62\uff0c\u8cc7\u6599\u5eab\u8981 50ms\uff0c\u5feb\u53d6\u53ea\u8981 1ms\u3002\u5dee 50 \u500d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7576\u4f60\u7684\u7db2\u7ad9\u6bcf\u79d2 10,000 \u500b\u8acb\u6c42\uff0c\u5176\u4e2d 80% \u5728\u770b\u540c\u6a23\u7684\u5546\u54c1\u9801\u9762\u6642\uff0c\u5feb\u53d6\u5c31\u662f\u6551\u547d\u7a3b\u8349\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5feb\u53d6\u7684\u4e0d\u540c\u5c64\u7d1a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5feb\u53d6\u4e0d\u53ea\u4e00\u7a2e\uff0c\u5b83\u51fa\u73fe\u5728\u6574\u500b\u67b6\u69cb\u7684\u6bcf\u4e00\u5c64\uff1a<\/p>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">\u4f7f\u7528\u8005\u7684\u700f\u89bd\u5668\n    \u2193 &#91;\u700f\u89bd\u5668\u5feb\u53d6] \u2190 \u7b2c 1 \u5c64\uff1a\u6700\u5feb\uff0c\u76f4\u63a5\u4e0d\u767c\u8acb\u6c42\n\nCDN \u908a\u7de3\u7bc0\u9ede\n    \u2193 &#91;CDN \u5feb\u53d6]   \u2190 \u7b2c 2 \u5c64\uff1a\u975c\u614b\u8cc7\u6e90\n\nLoad Balancer\n    \u2193\n\u61c9\u7528\u4f3a\u670d\u5668\n    \u2193 &#91;\u61c9\u7528\u5c64\u5feb\u53d6]  \u2190 \u7b2c 3 \u5c64\uff1aRedis \/ Memcached\n\n\u8cc7\u6599\u5eab\n      &#91;\u67e5\u8a62\u5feb\u53d6]    \u2190 \u7b2c 4 \u5c64\uff1a\u8cc7\u6599\u5eab\u81ea\u5df1\u7684\u5feb\u53d6\n<\/code><\/span><\/pre><\/div>\n\n\n<h4 class=\"wp-block-heading\">\u7b2c 1 \u5c64\uff1a\u700f\u89bd\u5668\u5feb\u53d6<\/h4>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"HTTP\" data-shcb-language-slug=\"http\"><span><code class=\"hljs language-http\">HTTP\/1.1 <span class=\"hljs-number\">200<\/span> OK\n<span class=\"hljs-attribute\">Cache-Control<\/span>: max-age=86400    \u2190 \u544a\u8a34\u700f\u89bd\u5668\u300c\u9019\u500b\u8cc7\u6e90 24 \u5c0f\u6642\u5167\u4e0d\u7528\u518d\u554f\u6211\u300d\n<span class=\"hljs-attribute\">Content-Type<\/span>: image\/jpeg\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTTP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">http<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7ffb\u8b6f<\/strong>\uff1a\u4f3a\u670d\u5668\u5728\u56de\u61c9\u88e1\u52a0\u4e00\u500b header\uff0c\u544a\u8a34\u700f\u89bd\u5668\u300c\u9019\u500b\u6771\u897f 86400 \u79d2\uff0824 \u5c0f\u6642\uff09\u5167\u4e0d\u6703\u8b8a\uff0c\u4f60\u5b58\u8d77\u4f86\u76f4\u63a5\u7528\u300d\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c 2 \u5c64\uff1aCDN \u5feb\u53d6<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c31\u662f\u4e0a\u9762 CDN \u7ae0\u7bc0\u8b1b\u7684\u90a3\u500b\u6a5f\u5236\u3002\u975c\u614b\u8cc7\u6e90\u7531\u908a\u7de3\u7bc0\u9ede\u5feb\u53d6\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c 3 \u5c64\uff1a\u61c9\u7528\u5c64\u5feb\u53d6\uff08Redis \/ Memcached\uff09<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u9019\u662f\u6700\u5e38\u898b\u7684\u5f8c\u7aef\u5feb\u53d6\u65b9\u6848\u3002\u5982\u679c AI \u5e6b\u4f60\u5beb\u5f8c\u7aef\uff0c\u4f60\u5f88\u53ef\u80fd\u6703\u770b\u5230\u9019\u6a23\u7684\u7a0b\u5f0f\u78bc\uff1a<\/p>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">import redis\n\ncache = redis.Redis(host=<span class=\"hljs-string\">'localhost'<\/span>, port=<span class=\"hljs-number\">6379<\/span>)  <span class=\"hljs-comment\"># \u9023\u7dda\u5230 Redis<\/span>\n\ndef get_product(product_id):\n    <span class=\"hljs-comment\"># \u7b2c 1 \u6b65\uff1a\u5148\u67e5\u5feb\u53d6<\/span>\n    cached = cache.get(f<span class=\"hljs-string\">\"product:{product_id}\"<\/span>)    <span class=\"hljs-comment\"># \u7528 key \u53bb\u67e5<\/span>\n    <span class=\"hljs-keyword\">if<\/span> cached:\n        <span class=\"hljs-keyword\">return<\/span> json.loads(cached)                   <span class=\"hljs-comment\"># \u6709\uff01\u76f4\u63a5\u56de\u50b3<\/span>\n\n    <span class=\"hljs-comment\"># \u7b2c 2 \u6b65\uff1a\u5feb\u53d6\u6c92\u6709\uff0c\u67e5\u8cc7\u6599\u5eab<\/span>\n    product = db.query(f<span class=\"hljs-string\">\"SELECT * FROM products WHERE id = {product_id}\"<\/span>)\n\n    <span class=\"hljs-comment\"># \u7b2c 3 \u6b65\uff1a\u5b58\u9032\u5feb\u53d6\uff0c\u4e0b\u6b21\u5c31\u6709\u4e86<\/span>\n    cache.set(f<span class=\"hljs-string\">\"product:{product_id}\"<\/span>, json.dumps(product), ex=<span class=\"hljs-number\">3600<\/span>)  <span class=\"hljs-comment\"># ex=3600 \u8868\u793a 1 \u5c0f\u6642\u5f8c\u904e\u671f<\/span>\n\n    <span class=\"hljs-keyword\">return<\/span> product\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u9010\u884c\u7ffb\u8b6f<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li><code>cache.get(...)<\/code> \u2014 \u53bb Redis \u67e5\u6709\u6c92\u6709\u5feb\u53d6\u904e\u7684\u8cc7\u6599<\/li>\n\n\n<li><code>if cached: return<\/code> \u2014 \u6709\u5c31\u76f4\u63a5\u56de\u50b3\uff08\u8d85\u5feb\uff0c1ms \u4ee5\u5167\uff09<\/li>\n\n\n<li><code>db.query(...)<\/code> \u2014 \u6c92\u6709\u624d\u53bb\u67e5\u8cc7\u6599\u5eab\uff08\u6162\uff0c50ms+\uff09<\/li>\n\n\n<li><code>cache.set(..., ex=3600)<\/code> \u2014 \u67e5\u5b8c\u5b58\u9032 Redis\uff0c\u8a2d\u5b9a 1 \u5c0f\u6642\u5f8c\u904e\u671f<\/li>\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u9019\u500b\u300c\u5148\u67e5\u5feb\u53d6 \u2192 \u6c92\u6709\u5c31\u67e5\u8cc7\u6599\u5eab \u2192 \u5b58\u56de\u5feb\u53d6\u300d\u7684\u5957\u8def\uff0c\u53eb\u505a <strong>Cache-Aside Pattern<\/strong>\u3002\u4f60\u5728 90% \u7684\u5f8c\u7aef\u7a0b\u5f0f\u78bc\u4e2d\u90fd\u6703\u770b\u5230\u9019\u500b\u6a21\u5f0f\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c 4 \u5c64\uff1a\u8cc7\u6599\u5eab\u67e5\u8a62\u5feb\u53d6<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u8cc7\u6599\u5eab\u81ea\u5df1\u4e5f\u6703\u5feb\u53d6\u5e38\u898b\u7684\u67e5\u8a62\u7d50\u679c\u3002\u9019\u90e8\u5206\u901a\u5e38\u4e0d\u9700\u8981\u4f60\u8655\u7406\uff0c\u77e5\u9053\u5b58\u5728\u5c31\u597d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5feb\u53d6\u7684\u81f4\u547d\u554f\u984c\uff1a\u8cc7\u6599\u4e0d\u4e00\u81f4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5feb\u53d6\u6700\u5927\u7684\u554f\u984c\uff1a<strong>\u8cc7\u6599\u904e\u671f\u4e86\u600e\u9ebc\u8fa6\uff1f<\/strong><\/p>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">\u6642\u9593\u7dda\uff1a\nt=0   \u5546\u54c1\u50f9\u683c = $100\uff0c\u5feb\u53d6\u4e5f\u5b58\u4e86 $100\nt=5   \u7ba1\u7406\u54e1\u628a\u50f9\u683c\u6539\u6210 $80\uff08\u8cc7\u6599\u5eab\u66f4\u65b0\u4e86\uff09\nt=10  \u4f7f\u7528\u8005\u770b\u5230\u7684\u9084\u662f $100\uff08\u56e0\u70ba\u5feb\u53d6\u6c92\u66f4\u65b0\uff09\u2190 \u554f\u984c\uff01\n<\/code><\/span><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u5e38\u898b\u7684\u89e3\u6c7a\u7b56\u7565\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<thead>\n<tr>\n<th>\u7b56\u7565<\/th>\n<th>\u505a\u6cd5<\/th>\n<th>\u9069\u5408\u5834\u666f<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>TTL\uff08\u5b58\u6d3b\u6642\u9593\uff09<\/td>\n<td>\u8a2d\u5b9a\u904e\u671f\u6642\u9593\uff0c\u904e\u671f\u81ea\u52d5\u522a\u9664<\/td>\n<td>\u5927\u90e8\u5206\u5834\u666f<\/td>\n<\/tr>\n<tr>\n<td>Write-Through<\/td>\n<td>\u5beb\u8cc7\u6599\u5eab\u7684\u540c\u6642\u4e5f\u5beb\u5feb\u53d6<\/td>\n<td>\u8b80\u591a\u5beb\u5c11<\/td>\n<\/tr>\n<tr>\n<td>Cache Invalidation<\/td>\n<td>\u8cc7\u6599\u66f4\u65b0\u6642\u4e3b\u52d5\u522a\u9664\u5feb\u53d6<\/td>\n<td>\u5c0d\u4e00\u81f4\u6027\u8981\u6c42\u9ad8<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6700\u5e38\u898b\u7684\u505a\u6cd5<\/strong>\u662f TTL \u2014 \u8a2d\u5b9a\u4e00\u500b\u5408\u7406\u7684\u904e\u671f\u6642\u9593\uff08\u4f8b\u5982 5 \u5206\u9418\uff09\uff0c\u904e\u671f\u5f8c\u81ea\u52d5\u91cd\u65b0\u67e5\u8cc7\u6599\u5eab\u3002\u7c21\u55ae\u7c97\u66b4\u4f46\u6709\u6548\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u500b\u6982\u5ff5\u5982\u4f55\u5354\u4f5c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u56de\u5230\u96d9 11 \u5834\u666f\uff0c\u5b8c\u6574\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n\n\n<div class=\"cbc-code-wrapper\"><div class=\"cbc-code-bar\"><button class=\"cbc-copy-button\">Copy<\/button><\/div><pre class=\"wp-block-code\"><span><code class=\"hljs\">\u4f7f\u7528\u8005\u60f3\u8cb7\u4e00\u96d9\u978b\n    |\n    v\n&#91;CDN] \u2192 \u5546\u54c1\u5716\u7247\u3001CSS\u3001JS \u76f4\u63a5\u5f9e\u908a\u7de3\u7bc0\u9ede\u56de\u50b3     \u2192 \u7701 80% \u975c\u614b\u8acb\u6c42\n    |\n    v\n&#91;Load Balancer] \u2192 \u628a\u52d5\u614b\u8acb\u6c42\u5206\u6563\u5230 5 \u53f0\u4f3a\u670d\u5668      \u2192 \u6bcf\u53f0\u53ea\u625b 1\/5\n    |\n    v\n&#91;Server A~E] \u2192 \u67e5\u5546\u54c1\u8cc7\u8a0a\n    |\n    v\n&#91;Redis Cache] \u2192 \u5feb\u53d6\u88e1\u6709\uff01\u76f4\u63a5\u56de\u50b3                  \u2192 \u7701 90% \u8cc7\u6599\u5eab\u67e5\u8a62\n    |\uff08\u53ea\u6709\u5feb\u53d6\u6c92\u6709\u7684\u624d\u5230\u9019\u6b65\uff09\n    v\n&#91;Database] \u2192 \u53ea\u8655\u7406\u771f\u6b63\u9700\u8981\u7684\u67e5\u8a62\n<\/code><\/span><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6548\u679c<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>CDN \u6514\u622a\u4e86 80% \u7684\u975c\u614b\u8cc7\u6e90\u8acb\u6c42<\/li>\n\n\n<li>Load Balancer \u628a\u5269\u4e0b\u7684\u8acb\u6c42\u5206\u6563\u5230\u591a\u53f0\u4f3a\u670d\u5668<\/li>\n\n\n<li>\u5feb\u53d6\u6514\u622a\u4e86 90% \u7684\u8cc7\u6599\u5eab\u67e5\u8a62<\/li>\n\n\n<li>\u8cc7\u6599\u5eab\u5be6\u969b\u53ea\u9700\u8981\u8655\u7406\u539f\u672c 2% \u7684\u6d41\u91cf<\/li>\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u9019\u5c31\u662f\u70ba\u4ec0\u9ebc\u8766\u76ae\u3001PChome \u9019\u4e9b\u96fb\u5546\u5e73\u53f0\u80fd\u6490\u4f4f\u6bcf\u5e74\u7684\u96d9 11 \u2014 \u4e0d\u662f\u56e0\u70ba\u6709\u4e00\u53f0\u8d85\u7d1a\u96fb\u8166\uff0c\u800c\u662f\u9760\u9019\u5957\u7d44\u5408\u62f3\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Vibe Coder \u6aa2\u67e5\u9ede<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7576\u4f60\u5728\u5c08\u6848\u4e2d\u770b\u5230\u9019\u4e9b\u6982\u5ff5\u6642\uff0c\u78ba\u8a8d\u4ee5\u4e0b\u4e8b\u9805\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u770b\u5230 Scaling \u76f8\u95dc\u8a2d\u5b9a\u6642<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>[ ] \u76ee\u524d\u662f Vertical \u9084\u662f Horizontal\uff1f\u6709\u6c92\u6709\u9047\u5230\u74f6\u9838\u7684\u98a8\u96aa\uff1f<\/li>\n\n\n<li>[ ] \u5982\u679c\u662f Horizontal\uff0c\u61c9\u7528\u7a0b\u5f0f\u662f\u4e0d\u662f stateless \u7684\uff1f\uff08\u4e0d\u628a\u4f7f\u7528\u8005\u8cc7\u6599\u5b58\u5728\u55ae\u53f0\u4f3a\u670d\u5668\u8a18\u61b6\u9ad4\u88e1\uff09<\/li>\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u770b\u5230 Load Balancer \u8a2d\u5b9a\u6642<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>[ ] \u7528\u7684\u662f\u4ec0\u9ebc\u5206\u914d\u7b56\u7565\uff1fRound Robin \u5c0d\u4f60\u7684\u5834\u666f\u5920\u7528\u55ce\uff1f<\/li>\n\n\n<li>[ ] \u6709\u6c92\u6709\u8a2d\u5b9a\u5065\u5eb7\u6aa2\u67e5\uff1f\uff08\u67d0\u53f0\u4f3a\u670d\u5668\u639b\u4e86\u8981\u81ea\u52d5\u8df3\u904e\uff09<\/li>\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u770b\u5230 CDN \u8a2d\u5b9a\u6642<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>[ ] \u975c\u614b\u8cc7\u6e90\u6709\u6c92\u6709\u8d70 CDN\uff1f\u5982\u679c\u5168\u90fd\u5f9e\u81ea\u5df1\u7684\u4f3a\u670d\u5668\u9001\uff0c\u6548\u80fd\u6703\u5f88\u5dee<\/li>\n\n\n<li>[ ] CDN \u7684\u5feb\u53d6\u6642\u9593\u8a2d\u591a\u4e45\uff1f\u592a\u9577\u6703\u5c0e\u81f4\u66f4\u65b0\u5f8c\u4f7f\u7528\u8005\u770b\u5230\u820a\u7248\u672c<\/li>\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u770b\u5230 Cache \u76f8\u95dc\u7a0b\u5f0f\u78bc\u6642<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>[ ] \u6709\u8a2d\u5b9a TTL\uff08\u904e\u671f\u6642\u9593\uff09\u55ce\uff1f\u6c92\u6709\u7684\u8a71\u5feb\u53d6\u6c38\u9060\u4e0d\u6703\u66f4\u65b0<\/li>\n\n\n<li>[ ] \u5feb\u53d6\u7684 key \u547d\u540d\u6709\u6c92\u6709\u610f\u7fa9\uff1f\uff08\u4f8b\u5982 <code>product:123<\/code> \u6bd4 <code>cache_1<\/code> \u597d\uff09<\/li>\n\n\n<li>[ ] \u6709\u8655\u7406 Cache Miss \u7684\u60c5\u6cc1\u55ce\uff1f\uff08\u5feb\u53d6\u6c92\u6709\u6642\u8981\u80fd\u6b63\u5e38\u5f9e\u8cc7\u6599\u5eab\u67e5\uff09<\/li>\n\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u672c\u7bc7\u91cd\u9ede\u56de\u9867<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<thead>\n<tr>\n<th>\u6982\u5ff5<\/th>\n<th>\u4e00\u53e5\u8a71<\/th>\n<th>\u4ec0\u9ebc\u6642\u5019\u7528<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Vertical Scaling<\/td>\n<td>\u5347\u7d1a\u55ae\u53f0\u6a5f\u5668<\/td>\n<td>\u521d\u671f\u6700\u7c21\u55ae\u7684\u505a\u6cd5<\/td>\n<\/tr>\n<tr>\n<td>Horizontal Scaling<\/td>\n<td>\u52a0\u66f4\u591a\u6a5f\u5668<\/td>\n<td>\u6d41\u91cf\u5927\u5230\u55ae\u53f0\u625b\u4e0d\u4f4f<\/td>\n<\/tr>\n<tr>\n<td>Load Balancer<\/td>\n<td>\u628a\u6d41\u91cf\u5206\u6563\u5230\u591a\u53f0<\/td>\n<td>\u7528\u4e86 Horizontal Scaling \u5c31\u9700\u8981<\/td>\n<\/tr>\n<tr>\n<td>CDN<\/td>\n<td>\u975c\u614b\u8cc7\u6e90\u653e\u5230\u5168\u7403\u5404\u5730<\/td>\n<td>\u4f7f\u7528\u8005\u5206\u6563\u5728\u4e0d\u540c\u5730\u5340<\/td>\n<\/tr>\n<tr>\n<td>Caching<\/td>\n<td>\u628a\u7b97\u904e\u7684\u7d50\u679c\u8a18\u8d77\u4f86<\/td>\n<td>\u540c\u6a23\u7684\u8cc7\u6599\u88ab\u53cd\u8986\u8acb\u6c42<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">**\u9762\u8a66\u5c0f\u63d0\u793a**\uff1a\u7cfb\u7d71\u8a2d\u8a08\u9762\u8a66\u4e2d\uff0c\u300c\u4f60\u7684\u7cfb\u7d71\u600e\u9ebc Scale\uff1f\u300d\u5e7e\u4e4e\u662f\u5fc5\u554f\u984c\u3002\u56de\u7b54\u5957\u8def\uff1a\u5148 Vertical Scaling\uff0c\u9047\u5230\u74f6\u9838\u5f8c Horizontal Scaling + Load Balancer\uff0c\u52a0\u4e0a CDN \u8655\u7406\u975c\u614b\u8cc7\u6e90\u3001Cache \u6e1b\u5c11\u8cc7\u6599\u5eab\u58d3\u529b\u3002\u9019\u56db\u500b\u6982\u5ff5\u662f\u7d44\u5408\u6280\uff0c\u4e0d\u662f\u55ae\u9078\u984c\u3002<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5ef6\u4f38\uff1a\u77e5\u9053\u5c31\u597d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9019\u4e9b\u9032\u968e\u4e3b\u984c\u5728\u9762\u8a66\u4e2d\u5076\u723e\u51fa\u73fe\uff0c\u5148\u77e5\u9053\u540d\u5b57\u5c31\u597d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li><strong>Auto Scaling<\/strong>\uff1a\u6839\u64da\u6d41\u91cf\u81ea\u52d5\u589e\u6e1b\u4f3a\u670d\u5668\u6578\u91cf\uff08\u96f2\u7aef\u5e73\u53f0\u90fd\u6709\u652f\u63f4\uff09<\/li>\n\n\n<li><strong>Reverse Proxy<\/strong>\uff1a\u548c Load Balancer \u985e\u4f3c\uff0c\u4f46\u9084\u80fd\u505a\u5b89\u5168\u904e\u6ffe\u3001SSL \u7d42\u6b62\u7b49<\/li>\n\n\n<li><strong>Cache Stampede<\/strong>\uff1a\u5feb\u53d6\u904e\u671f\u7684\u77ac\u9593\u5927\u91cf\u8acb\u6c42\u540c\u6642\u6253\u5230\u8cc7\u6599\u5eab\uff0c\u9020\u6210\u96ea\u5d29<\/li>\n\n\n<li><strong>Consistent Hashing<\/strong>\uff1aHorizontal Scaling \u6642\u66f4\u8070\u660e\u7684\u5206\u914d\u6f14\u7b97\u6cd5\uff0c\u6e1b\u5c11\u91cd\u65b0\u5206\u914d<\/li>\n\n\n<li><strong>Write-Behind Cache<\/strong>\uff1a\u5148\u5beb\u5feb\u53d6\u518d\u975e\u540c\u6b65\u5beb\u8cc7\u6599\u5eab\uff0c\u63d0\u5347\u5beb\u5165\u6548\u80fd\u4f46\u6709\u8cc7\u6599\u907a\u5931\u98a8\u96aa<\/li>\n\n<\/ul>\n\n\n\n<div id=\"quiz-fb27502e\">\n<style>\n#quiz-fb27502e .badge {\n        display: inline-block;\n        padding: 4px 10px;\n        border-radius: 12px;\n        font-size: 0.75em;\n        font-weight: bold;\n        margin-left: 8px;\n      }#quiz-fb27502e .badge.scenario {\n        background: #ebf8ff;\n        color: #2b6cb0;\n      }#quiz-fb27502e .badge.debug {\n        background: #fef3c7;\n        color: #92400e;\n      }#quiz-fb27502e .question-adv {\n        background: white;\n        border-radius: 10px;\n        padding: 24px;\n        margin: 20px 0;\n        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);\n        border-left: 4px solid #ed8936;\n      }#quiz-fb27502e .question-adv h3 {\n        margin-top: 0;\n        color: #2d3748;\n      }#quiz-fb27502e .code-block {\n        background: #1e1e1e;\n        color: #d4d4d4;\n        padding: 14px;\n        border-radius: 6px;\n        font-family: \"Menlo\", \"Monaco\", \"Courier New\", monospace;\n        font-size: 0.9em;\n        overflow-x: auto;\n        margin: 12px 0;\n        white-space: pre-wrap;\n      }#quiz-fb27502e .options-adv {\n        list-style: none;\n        padding: 0;\n      }#quiz-fb27502e .options-adv li {\n        padding: 14px 16px;\n        margin: 10px 0;\n        border: 2px solid #e2e8f0;\n        border-radius: 8px;\n        cursor: pointer;\n        transition: all 0.2s;\n      }#quiz-fb27502e .options-adv li:hover:not(.disabled) {\n        border-color: #ed8936;\n        background: #fffaf0;\n      }#quiz-fb27502e .options-adv li.disabled {\n        cursor: default;\n        opacity: 0.7;\n      }#quiz-fb27502e .options-adv li.show-answer {\n        border-color: #48bb78;\n        background: #f0fff4;\n      }#quiz-fb27502e .options-adv li.wrong {\n        border-color: #fc8181;\n        background: #fff5f5;\n      }#quiz-fb27502e .feedback-adv {\n        margin-top: 16px;\n        padding: 14px;\n        border-radius: 8px;\n        display: none;\n        line-height: 1.6;\n      }#quiz-fb27502e .feedback-adv.correct {\n        background: #f0fff4;\n        color: #276749;\n        display: block;\n      }#quiz-fb27502e .feedback-adv.wrong {\n        background: #fff5f5;\n        color: #c53030;\n        display: block;\n      }#quiz-fb27502e .feedback-adv \n      .score-adv {\n        text-align: center;\n        font-size: 1.4em;\n        padding: 24px;\n        background: white;\n        border-radius: 10px;\n        margin-top: 24px;\n        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);\n      }#quiz-fb27502e .intro {\n        background: #ebf8ff;\n        padding: 16px;\n        border-radius: 8px;\n        margin-bottom: 20px;\n        color: #2c5282;\n      }#quiz-fb27502e .scenario-box {\n        background: #f7fafc;\n        border: 1px solid #e2e8f0;\n        border-radius: 6px;\n        padding: 14px;\n        margin: 12px 0;\n        line-height: 1.6;\n      }\n<\/style>\n<h1>\u9032\u968e\u6e2c\u9a57\uff1a\u64f4\u5c55\u8207\u6548\u80fd \u2014 Scaling\u3001Load Balancer\u3001CDN\u3001Caching<\/h1>\n    <div class=\"intro\">\n      <strong>\u6e2c\u9a57\u76ee\u6a19\uff1a<\/strong>\u9a57\u8b49\u4f60\u662f\u5426\u80fd\u5728\u5be6\u969b\u60c5\u5883\u4e2d\u61c9\u7528\u6240\u5b78\u3002<br \/>\n      \u5171 5 \u984c\uff0c\u5305\u542b\u60c5\u5883\u984c\u8207\u932f\u8aa4\u8a3a\u65b7\u984c\u3002\n    <\/div>\n\n    <!-- \u60c5\u5883\u984c 1 -->\n    <div class=\"question-adv\" id=\"qAdv1\">\n      <h3>1. \u4f60\u7684\u96fb\u5546\u7db2\u7ad9\u521d\u671f\u53ea\u6709\u4e00\u53f0\u4f3a\u670d\u5668\uff0c\u6700\u8fd1\u4f7f\u7528\u8005\u6210\u9577\u5230\u6bcf\u79d2 5,000 \u500b\u8acb\u6c42\uff0c\u4f3a\u670d\u5668 CPU \u7d93\u5e38\u98c6\u5230 95%\u3002\u4f60\u7684\u5718\u968a\u53ea\u6709 2 \u500b\u4eba\uff0c\u7a0b\u5f0f\u78bc\u4e2d\u6709\u5f88\u591a\u5730\u65b9\u628a\u4f7f\u7528\u8005 session \u5b58\u5728\u4f3a\u670d\u5668\u8a18\u61b6\u9ad4\u88e1\u3002\u4f60\u61c9\u8a72\u5148\u63a1\u53d6\u54ea\u500b\u7b56\u7565\uff1f <span class=\"badge scenario\">\u60c5\u5883\u984c<\/span><\/h3>\n      <ul class=\"options-adv\">\n        <li onclick=\"checkAnswerAdv(1, 'A', 'B')\">A. \u76f4\u63a5\u6c34\u5e73\u64f4\u5c55\uff0c\u52a0 3 \u53f0\u4f3a\u670d\u5668\u642d\u914d Load Balancer<\/li>\n        <li onclick=\"checkAnswerAdv(1, 'B', 'B')\">B. \u5148\u5782\u76f4\u64f4\u5c55\uff08\u5347\u7d1a CPU \u548c RAM\uff09\uff0c\u722d\u53d6\u6642\u9593\u91cd\u69cb session \u7ba1\u7406<\/li>\n        <li onclick=\"checkAnswerAdv(1, 'C', 'B')\">C. \u5c0e\u5165 CDN \u4f86\u5206\u6d41\u6240\u6709\u8acb\u6c42<\/li>\n        <li onclick=\"checkAnswerAdv(1, 'D', 'B')\">D. \u52a0\u5165 Redis \u5feb\u53d6\uff0c\u628a\u6240\u6709\u8cc7\u6599\u5eab\u67e5\u8a62\u90fd\u5feb\u53d6\u8d77\u4f86<\/li>\n      <\/ul>\n      <div class=\"feedback-adv\" id=\"fbAdv1\"><\/div>\n    <\/div>\n\n    <!-- \u60c5\u5883\u984c 2 -->\n    <div class=\"question-adv\" id=\"qAdv2\">\n      <h3>2. \u4f60\u7684\u7db2\u7ad9\u6709 3 \u53f0\u5f8c\u7aef\u4f3a\u670d\u5668\uff0c\u4f7f\u7528 Load Balancer \u642d\u914d Round Robin \u7b56\u7565\u3002\u6700\u8fd1\u767c\u73fe Server A \u7684\u56de\u61c9\u6642\u9593\u660e\u986f\u6bd4 Server B \u548c C \u6162\uff08\u56e0\u70ba Server A \u5728\u8655\u7406\u8f03\u591a\u8017\u6642\u7684\u5831\u8868\u67e5\u8a62\uff09\uff0c\u4f46 Load Balancer \u9084\u662f\u7e7c\u7e8c\u628a 1\/3 \u7684\u6d41\u91cf\u9001\u7d66 Server A\u3002\u4f60\u61c9\u8a72\u600e\u9ebc\u8abf\u6574\uff1f <span class=\"badge scenario\">\u60c5\u5883\u984c<\/span><\/h3>\n      <ul class=\"options-adv\">\n        <li onclick=\"checkAnswerAdv(2, 'A', 'C')\">A. \u628a Server A \u5f9e Load Balancer \u4e2d\u79fb\u9664<\/li>\n        <li onclick=\"checkAnswerAdv(2, 'B', 'C')\">B. \u4f7f\u7528 IP Hash \u7b56\u7565\uff0c\u8b93\u5831\u8868\u4f7f\u7528\u8005\u56fa\u5b9a\u53bb Server A<\/li>\n        <li onclick=\"checkAnswerAdv(2, 'C', 'C')\">C. \u6539\u7528 Least Connections \u7b56\u7565\uff0c\u8b93\u8f03\u9592\u7684\u4f3a\u670d\u5668\u63a5\u66f4\u591a\u8acb\u6c42<\/li>\n        <li onclick=\"checkAnswerAdv(2, 'D', 'C')\">D. \u5c0d Server A \u505a\u5782\u76f4\u64f4\u5c55\uff0c\u5347\u7d1a\u6210\u66f4\u5927\u7684\u6a5f\u5668<\/li>\n      <\/ul>\n      <div class=\"feedback-adv\" id=\"fbAdv2\"><\/div>\n    <\/div>\n\n    <!-- \u60c5\u5883\u984c 3 -->\n    <div class=\"question-adv\" id=\"qAdv3\">\n      <h3>3. \u4f60\u7684\u96fb\u5546\u7db2\u7ad9\u4f7f\u7528\u8005\u5206\u4f48\u5728\u53f0\u7063\u3001\u65e5\u672c\u548c\u6771\u5357\u4e9e\u3002\u4f7f\u7528\u8005\u53cd\u6620\u5546\u54c1\u5716\u7247\u8f09\u5165\u5f88\u6162\uff08\u5e73\u5747 3 \u79d2\uff09\uff0c\u4f46\u5f8c\u7aef API \u56de\u61c9\u901f\u5ea6\u6b63\u5e38\uff08100ms \u5167\uff09\u3002\u4ee5\u4e0b\u54ea\u500b\u65b9\u6848\u6700\u80fd\u76f4\u63a5\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff1f <span class=\"badge scenario\">\u60c5\u5883\u984c<\/span><\/h3>\n      <ul class=\"options-adv\">\n        <li onclick=\"checkAnswerAdv(3, 'A', 'A')\">A. \u5c0e\u5165 CDN\uff0c\u628a\u5716\u7247\u7b49\u975c\u614b\u8cc7\u6e90\u5206\u6563\u5230\u5404\u5730\u7684\u908a\u7de3\u7bc0\u9ede<\/li>\n        <li onclick=\"checkAnswerAdv(3, 'B', 'A')\">B. \u589e\u52a0\u5f8c\u7aef\u4f3a\u670d\u5668\u6578\u91cf\uff0c\u642d\u914d Load Balancer \u5206\u6563\u58d3\u529b<\/li>\n        <li onclick=\"checkAnswerAdv(3, 'C', 'A')\">C. \u52a0\u5165 Redis \u5feb\u53d6\uff0c\u628a\u5716\u7247\u7684 URL \u5feb\u53d6\u8d77\u4f86<\/li>\n        <li onclick=\"checkAnswerAdv(3, 'D', 'A')\">D. \u628a\u4f3a\u670d\u5668\u5347\u7d1a\u5230\u66f4\u9ad8\u983b\u5bec\u7684\u6a5f\u5668<\/li>\n      <\/ul>\n      <div class=\"feedback-adv\" id=\"fbAdv3\"><\/div>\n    <\/div>\n\n    <!-- \u932f\u8aa4\u8a3a\u65b7\u984c 1 -->\n    <div class=\"question-adv\" id=\"qAdv4\">\n      <h3>4. \u958b\u767c\u8005\u7528 AI \u751f\u6210\u4e86\u4ee5\u4e0b Redis \u5feb\u53d6\u7a0b\u5f0f\u78bc\uff0c\u4f46\u4e0a\u7dda\u5f8c\u767c\u73fe\u5546\u54c1\u50f9\u683c\u66f4\u65b0\u5f8c\uff0c\u4f7f\u7528\u8005\u770b\u5230\u7684\u59cb\u7d42\u662f\u820a\u50f9\u683c\uff0c\u5373\u4f7f\u7b49\u4e86\u597d\u5e7e\u5929\u90fd\u4e0d\u6703\u6539\u8b8a\u3002\u554f\u984c\u51fa\u5728\u54ea\u88e1\uff1f <span class=\"badge debug\">\u932f\u8aa4\u8a3a\u65b7<\/span><\/h3>\n      <div class=\"code-block\">def get_product(product_id):\n    cached = cache.get(f&#8221;product:{product_id}&#8221;)\n    if cached:\n        return json.loads(cached)\n\n    product = db.query(f&#8221;SELECT * FROM products WHERE id = {product_id}&#8221;)\n    cache.set(f&#8221;product:{product_id}&#8221;, json.dumps(product))\n    return product<\/div>\n      <ul class=\"options-adv\">\n        <li onclick=\"checkAnswerAdv(4, 'A', 'B')\">A. <code>cache.get()<\/code> \u7684 key \u683c\u5f0f\u4e0d\u6b63\u78ba\uff0c\u61c9\u8a72\u7528\u5e95\u7dda\u800c\u975e\u5192\u865f<\/li>\n        <li onclick=\"checkAnswerAdv(4, 'B', 'B')\">B. <code>cache.set()<\/code> \u6c92\u6709\u8a2d\u5b9a <code>ex<\/code> \u53c3\u6578\uff08TTL\uff09\uff0c\u5feb\u53d6\u6c38\u9060\u4e0d\u6703\u904e\u671f<\/li>\n        <li onclick=\"checkAnswerAdv(4, 'C', 'B')\">C. \u61c9\u8a72\u7528 <code>json.dumps()<\/code> \u53d6\u4ee3 <code>json.loads()<\/code> \u4f86\u8b80\u53d6\u5feb\u53d6<\/li>\n        <li onclick=\"checkAnswerAdv(4, 'D', 'B')\">D. Redis \u9810\u8a2d\u4e0d\u652f\u63f4\u5b57\u4e32\u985e\u578b\u7684 key\uff0c\u9700\u8981\u6539\u7528\u6578\u5b57 ID<\/li>\n      <\/ul>\n      <div class=\"feedback-adv\" id=\"fbAdv4\"><\/div>\n    <\/div>\n\n    <!-- \u932f\u8aa4\u8a3a\u65b7\u984c 2 -->\n    <div class=\"question-adv\" id=\"qAdv5\">\n      <h3>5. \u5718\u968a\u5728 Nginx \u8a2d\u5b9a\u4e86 Load Balancer\uff0c\u4f46\u6e2c\u8a66\u6642\u767c\u73fe\u6240\u6709\u8acb\u6c42\u90fd\u53ea\u6253\u5230 Server A\uff0cServer B \u548c C \u5b8c\u5168\u6c92\u6536\u5230\u6d41\u91cf\u3002\u4ee5\u4e0b\u8a2d\u5b9a\u6a94\u54ea\u88e1\u6709\u554f\u984c\uff1f <span class=\"badge debug\">\u932f\u8aa4\u8a3a\u65b7<\/span><\/h3>\n      <div class=\"code-block\">upstream backend {\n    server 10.0.0.1:8080;\n    server 10.0.0.2:8080;\n    server 10.0.0.3:8080;\n}\n\nserver {\n    listen 80;\n    location \/ {\n        proxy_pass http:\/\/10.0.0.1:8080;\n    }\n}<\/div>\n      <ul class=\"options-adv\">\n        <li onclick=\"checkAnswerAdv(5, 'A', 'C')\">A. <code>upstream<\/code> \u5340\u584a\u7684\u540d\u7a31 <code>backend<\/code> \u4e0d\u80fd\u4f7f\u7528\uff0c\u61c9\u8a72\u6539\u6210 <code>servers<\/code><\/li>\n        <li onclick=\"checkAnswerAdv(5, 'B', 'C')\">B. \u4e09\u53f0\u4f3a\u670d\u5668\u4e0d\u80fd\u4f7f\u7528\u76f8\u540c\u7684 port 8080<\/li>\n        <li onclick=\"checkAnswerAdv(5, 'C', 'C')\">C. <code>proxy_pass<\/code> \u76f4\u63a5\u6307\u5411\u4e86 <code>10.0.0.1:8080<\/code>\uff0c\u61c9\u8a72\u6539\u6210 <code>http:\/\/backend<\/code> \u624d\u6703\u8d70 upstream \u5206\u914d<\/li>\n        <li onclick=\"checkAnswerAdv(5, 'D', 'C')\">D. \u7f3a\u5c11 <code>load_balancing round_robin;<\/code> \u6307\u4ee4\u4f86\u555f\u7528\u8ca0\u8f09\u5747\u8861<\/li>\n      <\/ul>\n      <div class=\"feedback-adv\" id=\"fbAdv5\"><\/div>\n    <\/div>\n\n    <div class=\"score-adv\" id=\"scoreAdv\" style=\"display:none;\"><\/div>\n<script>\n\n      let answeredAdv = 0;\n      let correctAdv = 0;\n      const totalAdv = 5;\n      const explanationsAdv = {\n        1: \"\u7a0b\u5f0f\u78bc\u4e2d\u628a session \u5b58\u5728\u4f3a\u670d\u5668\u8a18\u61b6\u9ad4\u88e1\uff0c\u4ee3\u8868\u76ee\u524d\u4e0d\u662f stateless \u8a2d\u8a08\u3002\u5982\u679c\u76f4\u63a5\u6c34\u5e73\u64f4\u5c55\uff0c\u4f7f\u7528\u8005\u7684 session \u6703\u56e0\u70ba\u88ab\u5206\u914d\u5230\u4e0d\u540c\u4f3a\u670d\u5668\u800c\u907a\u5931\u3002\u6b63\u78ba\u505a\u6cd5\u662f\u5148\u5782\u76f4\u64f4\u5c55\uff08\u5347\u7d1a\u786c\u9ad4\uff09\u4f86\u7de9\u89e3\u7576\u524d\u58d3\u529b\uff0c\u540c\u6642\u91cd\u69cb session \u7ba1\u7406\uff08\u4f8b\u5982\u6539\u5b58\u5230 Redis\uff09\uff0c\u4e4b\u5f8c\u518d\u8003\u616e\u6c34\u5e73\u64f4\u5c55\u3002CDN \u53ea\u80fd\u8655\u7406\u975c\u614b\u8cc7\u6e90\uff0c\u7121\u6cd5\u5206\u6d41\u52d5\u614b\u8acb\u6c42\u3002\u5feb\u53d6\u96d6\u7136\u6709\u5e6b\u52a9\uff0c\u4f46\u4e0d\u80fd\u89e3\u6c7a CPU \u904e\u8f09\u7684\u6839\u672c\u554f\u984c\u3002\",\n        2: \"Round Robin \u7684\u554f\u984c\u6b63\u662f\u300c\u4e0d\u7ba1\u4f3a\u670d\u5668\u5fd9\u4e0d\u5fd9\uff0c\u7167\u6a23\u8f2a\u6d41\u5206\u914d\u300d\u3002\u6539\u7528 Least Connections \u7b56\u7565\u5f8c\uff0cLoad Balancer \u6703\u67e5\u770b\u6bcf\u53f0\u4f3a\u670d\u5668\u76ee\u524d\u7684\u9023\u7dda\u6578\uff0c\u628a\u65b0\u8acb\u6c42\u9001\u5230\u6700\u9592\u7684\u90a3\u53f0\u3002\u7576 Server A \u56e0\u70ba\u8655\u7406\u5831\u8868\u800c\u9023\u7dda\u6578\u8f03\u9ad8\u6642\uff0c\u65b0\u8acb\u6c42\u6703\u81ea\u52d5\u504f\u5411 Server B \u548c C\u3002\u79fb\u9664 Server A \u6703\u6d6a\u8cbb\u8cc7\u6e90\uff1bIP Hash \u7121\u6cd5\u89e3\u6c7a\u8ca0\u8f09\u4e0d\u5747\u554f\u984c\uff1b\u5347\u7d1a Server A \u662f\u53ef\u884c\u4f46\u6210\u672c\u8f03\u9ad8\u4e14\u6cbb\u6a19\u4e0d\u6cbb\u672c\u3002\",\n        3: \"\u554f\u984c\u7684\u95dc\u9375\u662f\u300c\u5716\u7247\u8f09\u5165\u6162\u4f46 API \u6b63\u5e38\u300d\u3002\u5716\u7247\u662f\u975c\u614b\u8cc7\u6e90\uff0c\u8f09\u5165\u6162\u7684\u539f\u56e0\u662f\u7269\u7406\u8ddd\u96e2 \u2014 \u4f7f\u7528\u8005\u5206\u6563\u5728\u4e0d\u540c\u570b\u5bb6\uff0c\u5f9e\u55ae\u4e00\u4f3a\u670d\u5668\u50b3\u8f38\u5716\u7247\u6703\u53d7\u5230\u7db2\u8def\u5ef6\u9072\u5f71\u97ff\u3002CDN \u628a\u975c\u614b\u8cc7\u6e90\u8907\u88fd\u5230\u5168\u7403\u5404\u5730\u7684\u908a\u7de3\u7bc0\u9ede\uff0c\u4f7f\u7528\u8005\u5f9e\u6700\u8fd1\u7684\u7bc0\u9ede\u53d6\u5f97\u5716\u7247\uff0c\u5ef6\u9072\u53ef\u4ee5\u5f9e 200ms+ \u964d\u5230 20ms\u3002\u589e\u52a0\u4f3a\u670d\u5668\u6216\u5347\u7d1a\u983b\u5bec\u7121\u6cd5\u89e3\u6c7a\u7269\u7406\u8ddd\u96e2\u9020\u6210\u7684\u5ef6\u9072\u3002\u5feb\u53d6 URL \u4e5f\u7121\u610f\u7fa9\uff0c\u56e0\u70ba\u554f\u984c\u4e0d\u5728\u65bc\u67e5\u8a62 URL\uff0c\u800c\u5728\u65bc\u50b3\u8f38\u5716\u7247\u6a94\u6848\u672c\u8eab\u3002\",\n        4: \"\u6587\u7ae0\u4e2d\u7684\u6b63\u78ba\u7bc4\u4f8b\u662f <code>cache.set(f\\\"product:{product_id}\\\", json.dumps(product), ex=3600)<\/code>\uff0c\u5176\u4e2d <code>ex=3600<\/code> \u8a2d\u5b9a\u4e86 TTL\uff08\u5b58\u6d3b\u6642\u9593\uff09\u70ba 1 \u5c0f\u6642\u3002\u9019\u6bb5\u6709\u554f\u984c\u7684\u7a0b\u5f0f\u78bc\u5c11\u4e86 <code>ex<\/code> \u53c3\u6578\uff0c\u5c0e\u81f4\u5feb\u53d6\u6c38\u9060\u4e0d\u6703\u904e\u671f\u3002\u7576\u5546\u54c1\u50f9\u683c\u66f4\u65b0\u6642\uff0c\u820a\u7684\u5feb\u53d6\u8cc7\u6599\u4e0d\u6703\u88ab\u81ea\u52d5\u522a\u9664\uff0c\u4f7f\u7528\u8005\u5c31\u6703\u4e00\u76f4\u770b\u5230\u820a\u50f9\u683c\u3002\u4fee\u6b63\u65b9\u5f0f\u662f\u52a0\u4e0a <code>ex<\/code> \u53c3\u6578\uff0c\u4f8b\u5982 <code>cache.set(..., ex=3600)<\/code>\u3002\",\n        5: \"\u8a2d\u5b9a\u6a94\u5b9a\u7fa9\u4e86 <code>upstream backend<\/code> \u5340\u584a\u5217\u51fa\u4e09\u53f0\u4f3a\u670d\u5668\uff0c\u4f46\u5728 <code>proxy_pass<\/code> \u4e2d\u537b\u76f4\u63a5\u5beb\u4e86 <code>http:\/\/10.0.0.1:8080<\/code>\uff0c\u7b49\u65bc\u7e5e\u904e\u4e86 upstream \u5206\u914d\u6a5f\u5236\uff0c\u6240\u6709\u6d41\u91cf\u90fd\u76f4\u63a5\u9001\u5230\u7b2c\u4e00\u53f0\u4f3a\u670d\u5668\u3002\u6b63\u78ba\u505a\u6cd5\u662f\u628a <code>proxy_pass<\/code> \u6539\u6210 <code>http:\/\/backend<\/code>\uff0c\u9019\u6a23 Nginx \u5c31\u6703\u4f7f\u7528 upstream \u5340\u584a\u4e2d\u5b9a\u7fa9\u7684\u4f3a\u670d\u5668\u7fa4\u7d44\uff0c\u4e26\u7528\u9810\u8a2d\u7684 Round Robin \u7b56\u7565\u5206\u914d\u6d41\u91cf\u3002Nginx \u7684 Round Robin \u662f\u9810\u8a2d\u884c\u70ba\uff0c\u4e0d\u9700\u8981\u984d\u5916\u6307\u4ee4\u555f\u7528\u3002\"\n      };\n\n      function checkAnswerAdv(qNum, selected, correctAns) {\n        const question = document.getElementById(\"qAdv\" + qNum);\n        if (question.classList.contains(\"answered\")) return;\n\n        question.classList.add(\"answered\");\n        answeredAdv++;\n\n        const options = question.querySelectorAll(\".options-adv li\");\n        options.forEach((opt) => {\n          opt.classList.add(\"disabled\");\n          if (opt.textContent.startsWith(correctAns + \".\")) {\n            opt.classList.add(\"show-answer\");\n          }\n        });\n\n        const feedback = document.getElementById(\"fbAdv\" + qNum);\n        if (selected === correctAns) {\n          correctAdv++;\n          feedback.className = \"feedback-adv correct\";\n          feedback.innerHTML = \"&#10003; \u6b63\u78ba\uff01\" + explanationsAdv[qNum];\n        } else {\n          feedback.className = \"feedback-adv wrong\";\n          feedback.innerHTML =\n            \"&#10007; \u932f\u8aa4\u3002\u6b63\u78ba\u7b54\u6848\u662f \" + correctAns + \"\u3002\" + explanationsAdv[qNum];\n          options.forEach((opt) => {\n            if (opt.textContent.startsWith(selected + \".\")) {\n              opt.classList.add(\"wrong\");\n            }\n          });\n        }\n\n        if (answeredAdv === totalAdv) {\n          const scoreDiv = document.getElementById(\"scoreAdv\");\n          scoreDiv.style.display = \"block\";\n          let msg = \"\";\n          if (correctAdv === totalAdv) msg = \"&#127919; \u5b8c\u7f8e\uff01\u4f60\u5df2\u7d93\u6e96\u5099\u597d\u5be6\u6230\u4e86\uff01\";\n          else if (correctAdv >= Math.ceil(totalAdv * 0.8))\n            msg = \"&#128170; \u5f88\u68d2\uff01\u518d\u8907\u7fd2\u4e00\u4e0b\u932f\u7684\u984c\u76ee\";\n          else if (correctAdv >= Math.ceil(totalAdv * 0.6))\n            msg = \"&#128214; \u5efa\u8b70\u91cd\u8b80\u76f8\u95dc\u6bb5\u843d\u5f8c\u518d\u8a66\u4e00\u6b21\";\n          else msg = \"&#128260; \u5efa\u8b70\u91cd\u65b0\u95b1\u8b80\u6587\u4ef6\uff0c\u7279\u5225\u6ce8\u610f\u64cd\u4f5c\u6d41\u7a0b\";\n          scoreDiv.innerHTML =\n            \"\u6e2c\u9a57\u5b8c\u6210\uff01\u5f97\u5206\uff1a\" + correctAdv + \" \/ \" + totalAdv + \"<br>\" + msg;\n        }\n      }\n    \n<\/script>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u6e2c\u9a57\uff1a\u64f4\u5c55\u8207\u6548\u80fd \u2014 Scaling\u3001Load Balancer\u3001CDN\u3001Caching \u5171 5 \u984c\uff0c\u9ede\u9078\u7b54\u6848 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rolpb_likes":0,"footnotes":""},"categories":[711],"tags":[727,730,722,744,705,745,701],"class_list":["post-770","post","type-post","status-publish","format-standard","hentry","category-711","tag-caching","tag-cdn","tag-load-balancer","tag-scaling","tag-system-design","tag-745","tag-701"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":7}},"_links":{"self":[{"href":"https:\/\/blog.itsmygo.uk\/wordpress\/wp-json\/wp\/v2\/posts\/770","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.itsmygo.uk\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.itsmygo.uk\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.itsmygo.uk\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.itsmygo.uk\/wordpress\/wp-json\/wp\/v2\/comments?post=770"}],"version-history":[{"count":0,"href":"https:\/\/blog.itsmygo.uk\/wordpress\/wp-json\/wp\/v2\/posts\/770\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.itsmygo.uk\/wordpress\/wp-json\/wp\/v2\/media?parent=770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.itsmygo.uk\/wordpress\/wp-json\/wp\/v2\/categories?post=770"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.itsmygo.uk\/wordpress\/wp-json\/wp\/v2\/tags?post=770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}