{"id":152347,"date":"2020-09-07T08:43:14","date_gmt":"2020-09-07T00:43:14","guid":{"rendered":"http:\/\/4563.org\/?p=152347"},"modified":"2020-09-07T08:43:14","modified_gmt":"2020-09-07T00:43:14","slug":"%e5%a6%82%e4%bd%95%e7%ad%94%e5%a5%bd%e9%9d%a2%e8%af%95%e4%b8%ad%e7%9a%84%e7%b3%bb%e7%bb%9f%e8%ae%be%e8%ae%a1%e9%a2%98%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=152347","title":{"rendered":"\u5982\u4f55\u7b54\u597d\u9762\u8bd5\u4e2d\u7684\u7cfb\u7edf\u8bbe\u8ba1\u9898\uff1f"},"content":{"rendered":"
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\u5982\u4f55\u7b54\u597d\u9762\u8bd5\u4e2d\u7684\u7cfb\u7edf\u8bbe\u8ba1\u9898\uff1f <\/h1>\n

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\u8cc7\u6df1\u5927\u4f6c : hakunamatata11 <\/span> <\/i> 16<\/span> <\/div>\n
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\u7cfb\u7edf\u8bbe\u8ba1\u9762\u8bd5\u4e3b\u8981\u8003\u5bdf\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/h2>\n
    \n
  • \u53ef\u884c\u89e3 Work Solution 25%<\/li>\n
  • \u7279\u5b9a\u95ee\u9898 Special Case 20%<\/li>\n
  • \u5206\u6790\u80fd\u529b Analysis 25%<\/li>\n
  • \u6743\u8861 Tradeoff 15%<\/li>\n
  • \u77e5\u8bc6\u50a8\u5907 Knowledge Base 15%<\/li>\n<\/ul>\n

    \u5728\u9762\u8bd5\u4e2d\uff0c\u5e38\u89c1\u7684\u9519\u8bef\u662f\u9762\u8bd5\u5b98\u7ed9\u51fa\u95ee\u9898\u540e\uff0c\u5019\u9009\u4eba\u5c31\u5f00\u59cb\u603c\u5404\u79cd\u5173\u952e\u8bcd\uff0c\u4ec0\u4e48 Load Balancer\uff0cMemcache\uff0cNodeJS\uff0cMongoDB\uff0cMySQL\u2026\u2026<\/p>\n

    \u5b9e\u9645\u4e0a\uff0c\u9488\u5bf9\u7cfb\u7edf\u8bbe\u8ba1\u95ee\u9898\uff0c\u4e5d\u7ae0\u7b97\u6cd5\u6709\u4e00\u5957 4S \u5206\u6790\u6cd5\uff0c\u5373\u4f7f\u5b8c\u5168\u4e0d\u77e5\u9053\u7684\u95ee\u9898\u4e5f\u53ef\u4ee5\u6309\u7167\u8fd9\u4e2a\u65b9\u6cd5\u4e00\u6b65\u6b65\u53bb\u56de\u7b54\u3002<\/p>\n

    \u6240\u8c13 4S \u5206\u6790\u6cd5\u4e2d\u7684 4S \u662f\u6307Scenario \uff08\u573a\u666f\uff09\uff0cService \uff08\u670d\u52a1\uff09\uff0cStorage \uff08\u5b58\u50a8\uff09\uff0cScale \uff08\u6269\u5c55\uff09\u3002<\/strong><\/p>\n

    \u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u7ed3\u5408 4S \u5206\u6790\u6cd5\u6765\u5177\u4f53\u56de\u7b54\u4e00\u9053\u5e38\u89c1\u7cfb\u7edf\u8bbe\u8ba1\u9898\uff1a\u5982\u4f55\u8bbe\u8ba1\u4e00\u4e2a\u63a8\u7279\uff1f<\/strong><\/p>\n

    \u7b2c\u4e00\u6b65\uff1aScenario \u573a\u666f<\/strong><\/h2>\n

    \u5728\u8fd9\u4e00\u6b65\uff0c\u4f60\u9700\u8981\u8be2\u95ee\u9762\u8bd5\u5b98\uff1a\u9700\u8981\u8bbe\u8ba1\u54ea\u4e9b\u529f\u80fd\uff08\u4e5f\u53ef\u4ee5\u81ea\u5df1\u60f3\uff09\uff0c\u9700\u8981\u627f\u53d7\u591a\u5927\u7684\u8bbf\u95ee\u91cf\uff1f<\/p>\n

    \u9996\u5148\u53ef\u4ee5\u628a Twitter \u7684\u529f\u80fd\u4e00\u4e2a\u4e2a\u7f57\u5217\u51fa\u6765\uff0c\u5f88\u663e\u7136\u4f60\u65e0\u6cd5\u5728 45 \u5206\u949f\u7684\u9762\u8bd5\u4e2d\u5b8c\u6210\u6240\u6709\u529f\u80fd\u7684\u8bbe\u8ba1\uff0c\u6240\u4ee5\u9700\u8981\u7b5b\u9009\u51fa\u6838\u5fc3\u529f\u80fd\uff08 Post a Tweet\uff0cTimeline\uff0cNews Feed\uff0cFollow\/Unfollow a user\uff0cRegister\/Login \uff09\u3002<\/p>\n

    \u7136\u540e\u6709\u7684\u9762\u8bd5\u5b98\u53ef\u80fd\u4f1a\u95ee\u4f60\u7cfb\u7edf\u627f\u53d7\u7684 QPS \u5927\u6982\u662f\u591a\u5c11\uff1f\u9700\u8981\u8003\u8651\u5e76\u53d1\u7528\u6237\uff0c\u8bfb\u9891\u7387\uff08 Read QPS \uff09\u4ee5\u53ca\u5199\u9891\u7387\uff08 Write QPS \uff09\u3002\u8bb0\u4f4f\u91cd\u8981\u7684\u662f\u4f60\u7684\u601d\u8003\u548c\u8ba1\u7b97\u8fc7\u7a0b\u800c\u4e0d\u662f\u8ba1\u7b97\u7ed3\u679c\u3002<\/p>\n

    \u5206\u6790 QPS \u6709\u4ec0\u4e48\u7528\uff1f<\/strong><\/p>\n

      \n
    • \u5982\u679c QPS = 100\uff0c\u90a3\u4e48\u7528\u4f60\u7684\u7b14\u8bb0\u672c\u4f5c Web \u670d\u52a1\u5668\u5c31\u597d\u4e86\uff1b<\/li>\n
    • QPS = 1K\uff0c\u4e00\u53f0\u597d\u70b9\u7684 Web \u670d\u52a1\u5668\u4e5f\u80fd\u5e94\u4ed8\uff0c\u9700\u8981\u8003\u8651 Single Point Failure \uff1b<\/li>\n
    • QPS = 1m\uff0c\u5219\u9700\u8981\u5efa\u8bbe\u4e00\u4e2a 1000 \u53f0 Web \u670d\u52a1\u5668\u7684\u96c6\u7fa4\uff0c\u5e76\u4e14\u8981\u8003\u8651\u5982\u4f55 Maintainance \uff08\u67d0\u4e00\u53f0\u6302\u4e86\u600e\u4e48\u529e\uff09\u3002<\/li>\n<\/ul>\n

      QPS \u548c \u670d\u52a1\u5668 \/\u6570\u636e\u5e93\u4e4b\u95f4\u7684\u5173\u7cfb<\/strong><\/p>\n

        \n
      • \u4e00\u53f0 Web Server \u627f\u53d7\u91cf\u7ea6\u4e3a 1K \u7684 QPS \uff08\u8003\u8651\u5230\u903b\u8f91\u5904\u7406\u65f6\u95f4\u4ee5\u53ca\u6570\u636e\u5e93\u67e5\u8be2\u7684\u74f6\u9888\uff09\uff1b<\/li>\n
      • \u4e00\u53f0 SQL Database \u627f\u53d7\u91cf\u7ea6\u4e3a 1K \u7684 QPS \uff08\u5982\u679c JOIN \u548c INDEX query \u6bd4\u8f83\u591a\u7684\u8bdd\uff0c\u8fd9\u4e2a\u503c\u4f1a\u66f4\u5c0f\uff09\uff1b<\/li>\n
      • \u4e00\u53f0 NoSQL Database (Cassandra) \u7ea6\u627f\u53d7\u91cf\u662f 10k \u7684 QPS \uff1b<\/li>\n
      • \u4e00\u53f0 NoSQL Database (Memcached) \u7ea6\u627f\u53d7\u91cf\u662f 1M \u7684 QPS \u3002<\/li>\n<\/ul>\n

        \u5173\u4e8e\u66f4\u591a\u7684\u5185\u5bb9\uff0c\u53ef\u4ee5\u6765\u770b\u6211\u4e3b\u8bb2\u7684**\u300a\u7cfb\u7edf\u67b6\u6784\u8bbe\u8ba1\u300b**\uff0c\u73b0\u5728\u524d\u4e24\u8282\u9650\u514d\u5f00\u653e\u3002<\/p>\n<\/p><\/div>\n

        \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (0<\/span>) <\/div>\n
        <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
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        • \n","protected":false},"excerpt":{"rendered":"

          \u5982\u4f55\u7b54\u597d\u9762\u8bd5\u4e2d\u7684\u7cfb\u7edf\u8bbe\u8ba1\u9898\uff1f \u8cc7\u6df1…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/152347"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=152347"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/152347\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=152347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=152347"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=152347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}