{"id":167112,"date":"2020-10-08T13:29:08","date_gmt":"2020-10-08T05:29:08","guid":{"rendered":"http:\/\/4563.org\/?p=167112"},"modified":"2020-10-08T13:29:08","modified_gmt":"2020-10-08T05:29:08","slug":"%e5%a6%82%e4%bd%95%e8%ae%be%e8%ae%a1%e7%a7%92%e6%9d%80%e7%b3%bb%e7%bb%9f%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=167112","title":{"rendered":"\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  \u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : hakunamatata11 <\/span>  <span><i><\/i> 4<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>\u79d2\u6740\u7cfb\u7edf\u662f\u6211\u5728\u9762\u8bd5\u4e2d\u95ee\u5f97\u6bd4\u8f83\u591a\u7684\uff0c\u5982\u679c\u8bf4\u7a0b\u5e8f = \u7b97\u6cd5 +\u6570\u636e\u7ed3\u6784\u7684\u8bdd\uff0c\u90a3\u4e48\u7cfb\u7edf = \u670d\u52a1 + \u6570\u636e\u5b58\u50a8\u3002\u6240\u4ee5\u7cfb\u7edf\u8bbe\u8ba1\u4e2d\uff0c\u6211\u4eec\u66f4\u591a\u7684\u662f\u56f4\u7ed5\u670d\u52a1\u548c\u6570\u636e\u5b58\u50a8\u6765\u8ba8\u8bba\u3002<\/p>\n<p>\u4e3e\u4e2a\u7b80\u5355\u4f8b\u5b50\uff1a\u67d0\u5e74\u53cc 11\uff0c\u5546\u5bb6\u4ee5 4499 \u7684\u4ef7\u683c\u4e0a\u67b6\u4e86\u67d0 iphone\uff0c\u6bd4\u5b98\u7f51\u4ef7\u683c\u4fbf\u5b9c\u4e86 1000 \u5458\uff0c\u5e93\u5b58\u603b\u6570 10 \u53f0\uff0c\u8fd0\u8425\u8bbe\u7f6e 11\/11 00:00 \u6d3b\u52a8\u751f\u6548\uff0c\u4e00\u4eba\u53ea\u80fd\u8d2d\u4e70 1 \u53f0\uff0c\u5546\u54c1\u552e\u5b8c\u4e3a\u6b62\u3002<\/p>\n<p>\u9996\u5148\u68b3\u7406\u4e0b\u7528\u6237\u7aef\u7684\u6d41\u7a0b\u56fe\uff1a<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/20201015_5f87eff4156b2.jpg\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f\" \/><\/p>\n<p>\u6839\u636e\u4e5d\u7ae0\u7b97\u6cd5**\u7cfb\u7edf\u8bbe\u8ba1 4S \u5206\u6790\u6cd5**\uff0c**\u7b2c\u4e00\u6b65 Scenario \u573a\u666f\u3002**\u9700\u8981\u786e\u5b9a\u8bbe\u8ba1\u54ea\u4e9b\u529f\u80fd\uff0c\u627f\u53d7\u591a\u5927\u7684\u8bbf\u95ee\u91cf\uff1f<\/p>\n<p>\u8fd9\u91cc\u8981\u77e5\u9053\u79d2\u6740\u7cfb\u7edf\u7684\u5e38\u89c1\u6982\u5ff5 QPS \uff08 Queries Per Second \uff09\uff0c\u5373\u4e00\u79d2\u5185\u53ef\u4ee5\u5904\u7406\u7684\u8bf7\u6c42\u6570\u91cf\u3002<\/p>\n<p>\u5047\u5982\u4e00\u4e2a\u670d\u52a1\u7684 RT \uff08 Response time \uff09\u662f 20ms\uff0c\u5219 QPS \u4e3a 50 \uff08\u8fd9\u91cc\u8ba1\u7b97\u7684\u662f\u5355\u673a\u5355\u7ebf\u7a0b QPS\uff0c\u5982\u679c\u8981\u8ba1\u7b97\u96c6\u7fa4\u7684\u8bdd\uff0c\u9700\u8981\u8003\u8651\u96c6\u7fa4\u6570\u91cf\u548c\u7ebf\u7a0b\u6570\u91cf\uff09\u3002<\/p>\n<blockquote>\n<p>QPS = 100\uff0c\u7528\u4f60\u7684\u7b14\u8bb0\u672c\u505a Web \u670d\u52a1\u5668\u8db3\u77e3\u3002 QPS = 1k\uff0c\u7528\u4e00\u53f0\u597d\u70b9\u7684 Web \u670d\u52a1\u5668\u4e5f\u5dee\u4e0d\u591a\u4e86\u3002 QPS = 1m\uff0c\u5219\u9700\u8981\u5efa\u8bbe\u4e00\u4e2a 1000 \u53f0 Web \u670d\u52a1\u5668\u7684\u96c6\u7fa4\u3002<\/p>\n<\/blockquote>\n<p><strong>QPS \u548c\u670d\u52a1\u5668 \/\u6570\u636e\u5e93\u4e4b\u95f4\u7684\u5173\u7cfb\uff1a<\/strong><\/p>\n<blockquote>\n<p>\u4e00\u53f0\u670d\u52a1\u5668\u627f\u53d7\u91cf\u7ea6 1k \u7684 QPS \uff08\u8003\u8651\u5230\u903b\u8f91\u5904\u7406\u65f6\u95f4\u4ee5\u53ca\u6570\u636e\u5e93\u67e5\u8be2\u7684\u74f6\u9888\uff09 \u4e00\u53f0 SQL Database \u627f\u53d7\u91cf\u7ea6 1k \u7684 QPS(\u5982\u679c JOIN \u548c INDEX query \u6bd4\u8f83\u591a\u7684\u8bdd\uff0c\u8fd9\u4e2a\u503c\u4f1a\u66f4\u5c0f\uff09 \u4e00\u53f0 NoSQL Database \uff08 Casscandra \uff09\u627f\u53d7\u91cf\u7ea6 10k \u7684 QPS \u4e00\u53f0 NoSQL Database \uff08 Memcached \uff09\u627f\u53d7\u91cf\u7ea6 1M \u7684 QPS<\/p>\n<\/blockquote>\n<p><strong>\u7b2c\u4e8c\u6b65\uff0cService \u670d\u52a1<\/strong>\u3002<\/p>\n<p>\u670d\u52a1\u53ef\u4ee5\u8ba4\u4e3a\u662f\u903b\u8f91\u5904\u7406\u7684\u6574\u5408\u3002\u5bf9\u4e8e\u540c\u4e00\u7c7b\u95ee\u9898\u7684\u903b\u8f91\u5904\u7406\u5f52\u5e76\u5728\u4e00\u4e2a\u670d\u52a1\u4e2d\uff0c\u6574\u4e2a\u7cfb\u7edf\u53ef\u4ee5\u7ec6\u5206\u4e3a\u82e5\u5e72\u4e2a\u5c0f\u7684\u670d\u52a1\u3002<\/p>\n<p>\u8fd9\u91cc\u79d2\u6740\u7cfb\u7edf\u670d\u52a1\u8bbe\u8ba1\u5927\u81f4\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/20201015_5f87f000a4a9b.jpg\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f\" \/><\/p>\n<p><strong>\u7b2c\u4e09\u6b65\uff0cStorage \u5b58\u50a8<\/strong>\uff0c\u6570\u636e\u662f\u5982\u4f55\u5b58\u50a8\u548c\u8bbf\u95ee\u7684\u3002\u4e3a\u6bcf\u4e2a\u670d\u52a1\u9009\u62e9\u5408\u9002\u7684\u5b58\u50a8\u7ed3\u6784\uff0c\u7136\u540e\u7ec6\u5316\u6570\u636e\u8868\u7ed3\u6784\u3002\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u79d2\u6740\u7cfb\u7edf\u6570\u636e\u5e93\u8bbe\u8ba1\u5982\u4e0b<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/20201015_5f87f00e37d65.jpg\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f\" \/><\/p>\n<p>\u4e8e\u662f\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u79d2\u6740\u6d3b\u52a8\u4e2d\uff0c\u6570\u636e\u5e93\u4e4b\u95f4\u7684\u5173\u7cfb\u5982\u56fe\u6240\u793a<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/20201015_5f87f01ad14c7.jpg\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f\" \/><\/p>\n<p>\u597d\u4e86\uff0c\u63a5\u4e0b\u6765\u662f\u91cd\u70b9\u3002\u6211\u4eec\u5148\u57fa\u4e8e\u6570\u636e\u5e93 Mysql \u6765\u6263\u5e93\u5b58<\/p>\n<pre><code>update stock set count = count - 1 where product_id = xxxx and count &gt; 0 <\/code><\/pre>\n<p>\u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff0c\u79d2\u6740\u7cfb\u7edf\u4e00\u5b9a\u4f1a\u6709\u5e76\u53d1\uff08 concurrent \uff09\u95ee\u9898\uff0c\u600e\u4e48\u529e\uff1f<\/p>\n<p>\u8fd9\u91cc\u4e00\u822c\u6709\u4e24\u79cd\u89e3\u51b3\u65b9\u6848\uff1a<strong>\u4e50\u89c2\u9501\uff08 Optimistic Lock \uff09\u548c\u60b2\u89c2\u9501\uff08 Pessimistic Lock \uff09\u3002<\/strong><\/p>\n<p>\u60b2\u89c2\u9501\u7684\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/20201015_5f87f0284d0df.jpg\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f\" \/><\/p>\n<p>\u5728\u5bf9\u4e8e\u6570\u636e\u4e00\u81f4\u6027\u8981\u6c42\u975e\u5e38\u9ad8\u7684\u573a\u666f\u4e2d\uff0c\u4e00\u822c\u7528\u60b2\u89c2\u9501\u3002<\/p>\n<p>\u4e50\u89c2\u9501\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/20201015_5f87f034b053a.jpg\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u5230\u60b2\u89c2\u9501\u7684\u95ee\u9898\u662f\u4f1a\u5360\u7528\u5927\u91cf\u7684\u7ebf\u7a0b\u8d44\u6e90\uff0c\u53ef\u80fd\u5bfc\u81f4 mysql \u7684\u7ebf\u7a0b\u8017\u5c3d\u3002\u800c\u4e50\u89c2\u9501\u5728 version \u53d8\u52a8\u9891\u7e41\u7684\u60c5\u51b5\u4e0b\u5219\u4e0d\u9002\u7528\uff0c\u6240\u4ee5\u79d2\u6740\u7cfb\u7edf\u5c31\u4e0d\u592a\u9002\u5408\u7528\u4e50\u89c2\u9501\uff0c\u56e0\u4e3a version \uff08\u5e93\u5b58\uff09\u53d8\u5316\u592a\u5feb\u4e86\u3002<\/p>\n<p>\u53e6\u5916\u53ef\u4ee5\u518d\u770b\u4e0b Redis \u4e0b\u7684\u79d2\u6740\u7cfb\u7edf\u6570\u636e\u5e93\u8bbe\u8ba1\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/20201015_5f87f0422dac4.jpg\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f\" \/><\/p>\n<p>\u51e0\u4e2a\u5173\u4e8e\u79d2\u6740\u7cfb\u7edf\u4e2d Redis \u7684\u5e38\u89c1\u95ee\u9898\uff1a<\/p>\n<p><strong>\u4ec0\u4e48\u65f6\u5019\u628a\u5e93\u5b58\u5199\u5165\u5230 Redis \uff1f<\/strong> \u79d2\u6740\u6d3b\u52a8\u521b\u5efa \/\u7ef4\u62a4\u65f6\u5199\u5165 Redis \u3002 <strong>\u5982\u4f55\u4fdd\u8bc1\u6d3b\u52a8\u6570\u636e\u5e93\u548c\u5e93\u5b58\u6570\u636e\u4e00\u81f4\uff1f<\/strong> \u53ef\u4ee5\u4f7f\u7528\u5206\u5e03\u5f0f\u4e8b\u52a1\u6216\u6d88\u606f\u961f\u5217\u3002<\/p>\n<p>**\u5206\u5e03\u5f0f\u4e8b\u52a1\uff1a**\u4fdd\u8bc1\u591a\u4e2a\u6570\u636e\u5e93\u7684\u64cd\u4f5c\u540c\u65f6\u6210\u529f\u6216\u8005\u540c\u65f6\u5931\u8d25\u3002\u5bf9\u5f3a\u4e00\u81f4\u6027\u6709\u8981\u6c42\u7684\u4e1a\u52a1\u573a\u666f\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u5206\u5e03\u5f0f\u4e8b\u52a1\uff0c\u6bd4\u5982\u94f6\u884c\u8f6c\u8d26<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/20201015_5f87f04ff074e.jpg\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f\" \/><\/p>\n<p>**\u6d88\u606f\u961f\u5217\uff1a**\u57fa\u4e8e\u751f\u4ea7\u8005 \/\u6d88\u8d39\u8005\u6a21\u578b\u7684\u7ec4\u4ef6\uff0c\u4e00\u822c\u5b9e\u73b0\u5f02\u6b65\u4efb\u52a1\uff08\u975e\u5b9e\u65f6\u5904\u7406\uff09\u65f6\u4f1a\u5f15\u5165\u6d88\u606f\u961f\u5217\u3002\u6d88\u606f\u961f\u5217\u7684\u597d\u5904\u662f\u4efb\u52a1\u53ef\u4ee5\u6162\u6162\u5904\u7406\uff0c\u4e0d\u5fc5\u540c\u6b65\u5904\u7406\u7b49\u7740\u54cd\u5e94\u7ed3\u679c\u3002\u76ee\u524d\u4e3b\u6d41\u7684\u6d88\u606f\u961f\u5217\u6709 RocketMQ \u3001Kafka \u7b49\u3002\u4f7f\u7528\u573a\u666f\u9664\u4e86\u5f02\u6b65\u4efb\u52a1\u4e4b\u5916\uff0c\u4e00\u822c\u8fd8\u7528\u4e8e\u5931\u8d25\u7684\u60c5\u51b5\u4e0b\u91cd\u8bd5\u5904\u7406\uff0c\u91cd\u590d\u6d88\u8d39\u76f4\u5230\u6d88\u8d39\u6210\u529f\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/20201015_5f87f05ea9059.png\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f\" \/><\/p>\n<p><strong>\u4e0b\u5355\u51cf\u5e93\u5b58 \/\u652f\u4ed8\u51cf\u5e93\u5b58\uff1f<\/strong> \u4e0b\u5355\u9501\u5b9a\u5e93\u5b58\uff0c\u652f\u4ed8\u51cf\u5e93\u5b58\u3002<\/p>\n<p><strong>\u5982\u4f55\u9632\u6b62\u5546\u54c1\u88ab\u8d85\u5356\uff1f<\/strong> \u628a\u5e93\u5b58\u6570\u636e\u653e\u5165\u5230\u7f13\u5b58\u4e2d\uff0c\u5229\u7528\u7f13\u5b58\u7684\u539f\u5b50\u7279\u6027\u4fdd\u8bc1\u540c\u65f6\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u64cd\u4f5c\u5e93\u5b58\u3002<\/p>\n<p><strong>\u5e93\u5b58\u5199\u56de\u6570\u636e\u5e93\u7684\u65f6\u673a\uff1f<\/strong> \u91c7\u7528\u5b9a\u65f6\u4efb\u52a1\u540c\u6b65 Redis \u7684\u6570\u636e\u5199\u56de\u6570\u636e\u5e93\u3002<\/p>\n<p>\u6700\u540e\uff0c<strong>4S \u5206\u6790\u6cd5\u7684\u7b2c\u56db\u6b65\uff0cScale \u6269\u5c55<\/strong>\u3002\u5bf9\u4e8e\u79d2\u6740\u7cfb\u7edf\u6765\u8bf4\uff0c\u5c31\u662f\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u5982\u4f55\u4f18\u5316\u7cfb\u7edf\u3002<\/p>\n<p>\u53e6\u5916\u5173\u4e8e 4S \u5206\u6790\u6cd5\u4ee5\u53ca\u7cfb\u7edf\u8bbe\u8ba1\u9762\u8bd5\u7684\u5404\u79cd\u95ee\u9898\uff0c\u5728\u300a<strong>\u7cfb\u7edf\u67b6\u6784\u8bbe\u8ba1 System Design 2020 \u7248<\/strong>\u300b\u4e2d\u4e5f\u90fd\u6709\u8bb2\u5230\uff0c\u540c\u65f6\u65b0\u7248\u8bfe\u7a0b\u4e2d\u6211\u4eec\u9080\u8bf7\u4e86 3 \u4f4d\u4e00\u7ebf IT \u5927\u5382\u9762\u8bd5\u5b98\uff0c\u8bb2\u89e3\u5f53\u524d\u56fd\u5185\u70ed\u95e8\u7cfb\u7edf\u8bbe\u8ba1\u95ee\u9898\uff0c**\u524d\u4e24\u8282\u9650\u514d\u5f00\u653e**\u4e2d\uff0c\u6709\u5174\u8da3\u7684\u540c\u5b66\u53ef\u4ee5\u6765\u770b\u770b\u3002<\/p>\n<p>\u9996\u8282\u514d\u8d39\u8bd5\u542c\u8bfe\u968f\u65f6\u53ef\u8bd5\u542c\uff0c\u7b2c\u4e8c\u8282\u514d\u8d39\u8bd5\u542c\u8bfe\u660e\u5929\u65e9\u4e0a 9:30-11:30 \u60ca\u559c\u5f00\u64ad\uff0c\u6233\u6211\u5373\u53ef\u514d\u8d39\u62a5\u540d\u8bd5\u542c<\/p>\n<h3>\u514d\u8d39\u8bd5\u542c\u5185\u5bb9\u5982\u4e0b\uff1a<\/h3>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/20201015_5f87f06a49135.png\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f\" \/><\/p>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>0<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u8bbe\u8ba1\u79d2\u6740\u7cfb\u7edf\uff1f \u8cc7\u6df1\u5927\u4f6c : &hellip;<\/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\/167112"}],"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=167112"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/167112\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=167112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=167112"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=167112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}