{"id":1394,"date":"2020-03-18T00:09:08","date_gmt":"2020-03-17T16:09:08","guid":{"rendered":"http:\/\/blog.coolcoding.cn\/?p=1394"},"modified":"2020-09-27T11:22:46","modified_gmt":"2020-09-27T03:22:46","slug":"%e5%90%8e%e5%8f%b0%e5%bc%80%e5%8f%91%e9%9d%a2%e8%af%95%e9%a2%98","status":"publish","type":"post","link":"https:\/\/blog.coolcoding.cn\/?p=1394","title":{"rendered":"\u540e\u53f0\u5f00\u53d1\u9762\u8bd5\u9898"},"content":{"rendered":"\n

C\/C++<\/h2>\n\n\n\n

const
\u591a\u6001
\u4ec0\u4e48\u7c7b\u4e0d\u80fd\u88ab\u7ee7\u627f<\/p>\n\n\n\n


\u7f51\u7edc<\/h2>\n\n\n\n

\u7f51\u7edc\u7684\u5b57\u8282\u5e8f
\u7f51\u7edc\u77e5\u8bc6 tcp\u4e09\u6b21\u63e1\u624b \u5404\u79cd\u7ec6\u8282 timewait\u72b6\u6001
tcp \u4e0e udp \u533a\u522b \u6982\u5ff5 \u9002\u7528\u8303\u56f4
TCP\u56db\u6b21\u6325\u624b\u8bb2\u4e00\u4e0b\u8fc7\u7a0b\uff0c\u6700\u540e\u4e00\u6b21ack\u5982\u679c\u5ba2\u6237\u7aef\u6ca1\u6536\u5230\u600e\u4e48\u529e\uff0c\u4e3a\u4ec0\u4e48\u6325\u624b\u4e0d\u80fd\u53ea\u6709\u4e09\u6b21\uff0c\u4e3a\u4ec0\u4e48time_wait\u3002
\u5bf9\u4e8esocket\u7f16\u7a0b\uff0caccept\u65b9\u6cd5\u662f\u5e72\u4ec0\u4e48\u7684\uff0c\u5728\u4e09\u6b21\u63e1\u624b\u4e2d\u5c5e\u4e8e\u7b2c\u51e0\u6b21\uff0c\u53ef\u4ee5\u731c\u4e00\u4e0b\uff0c\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u89c9\u5f97\u3002
tcp\u600e\u4e48\u4fdd\u8bc1\u6709\u5e8f\u4f20\u8f93\u7684\uff0c\u8bb2\u4e0btcp\u7684\u5feb\u901f\u91cd\u4f20\u548c\u62e5\u585e\u673a\u5236\uff0c\u77e5\u4e0d\u77e5\u9053time_wait\u72b6\u6001\uff0c\u8fd9\u4e2a\u72b6\u6001\u51fa\u73b0\u5728\u4ec0\u4e48\u5730\u65b9\uff0c\u6709\u4ec0\u4e48\u7528\uff1f
\u77e5\u9053udp\u662f\u4e0d\u53ef\u9760\u7684\u4f20\u8f93\uff0c\u5982\u679c\u4f60\u6765\u8bbe\u8ba1\u4e00\u4e2a\u57fa\u4e8eudp\u5dee\u4e0d\u591a\u53ef\u9760\u7684\u7b97\u6cd5\uff0c\u600e\u4e48\u8bbe\u8ba1\uff1f
http\u4e0ehttps\u6709\u5565\u533a\u522b\uff1f\u8bf4\u4e0bhttps\u89e3\u51b3\u4e86\u4ec0\u4e48\u95ee\u9898\uff0c\u600e\u4e48\u89e3\u51b3\u7684\uff1f\u8bf4\u4e0bhttps\u7684\u63e1\u624b\u8fc7\u7a0b\u3002
tcp \u7c98\u5305\u534a\u5305\u95ee\u9898\u600e\u4e48\u5904\u7406\uff1f
keepalive \u662f\u4ec0\u4e48\u4e1c\u4e1c\uff1f\u5982\u4f55\u4f7f\u7528\uff1f
\u5217\u4e3e\u4f60\u6240\u77e5\u9053\u7684tcp\u9009\u9879\uff0c\u5e76\u8bf4\u660e\u5176\u4f5c\u7528\u3002
socket\u4ec0\u4e48\u60c5\u51b5\u4e0b\u53ef\u8bfb\uff1f
nginx\u7684epoll\u6a21\u578b\u7684\u4ecb\u7ecd\u4ee5\u53caio\u591a\u8def\u590d\u7528\u6a21\u578b
SYN Flood\u653b\u51fb
\u6d41\u91cf\u63a7\u5236\uff0c\u62e5\u585e\u63a7\u5236
TCP\u548cUDP\u533a\u522b\uff0cTCP\u5982\u4f55\u4fdd\u8bc1\u53ef\u9760\u6027\uff0c\u5bf9\u65b9\u662f\u5426\u5b58\u6d3b(\u5fc3\u8df3\u68c0\u6d4b)
tcpdump\u6293\u5305\uff0c\u5982\u4f55\u5206\u6790\u6570\u636e\u5305
tcp\u5982\u4f55\u8bbe\u5b9a\u8d85\u65f6\u65f6\u95f4
\u57fa\u4e8esocket\u7f51\u7edc\u7f16\u7a0b\u548ctcp\/ip\u534f\u8bae\u6808\uff0c\u8bb2\u8bb2\u4ece\u5ba2\u6237\u7aefsend()\u5f00\u59cb\uff0c\u5230\u670d\u52a1\u7aefrecv()\u7ed3\u675f\u7684\u8fc7\u7a0b\uff0c\u8d8a\u7ec6\u8d8a\u597d
http\u62a5\u6587\u683c\u5f0f
http1.1\u4e0ehttp1.0\u533a\u522b\uff0chttp2.0\u7279\u6027
http3\u4e86\u89e3\u5417
http1.1\u957f\u8fde\u63a5\u65f6\uff0c\u53d1\u9001\u4e00\u4e2a\u8bf7\u6c42\u963b\u585e\u4e86\uff0c\u8fd4\u56de\u4ec0\u4e48\u72b6\u6001\u7801\uff1f
udp\u8c03\u7528connect\u6709\u4ec0\u4e48\u4f5c\u7528\uff1f<\/p>\n\n\n\n


\u64cd\u4f5c\u7cfb\u7edf<\/h2>\n\n\n\n

\u8fdb\u7a0b\u548c\u7ebf\u7a0b-\u5206\u522b\u7684\u6982\u5ff5 \u533a\u522b \u9002\u7528\u8303\u56f4 \u5b83\u4eec\u5206\u522b\u7684\u901a\u8baf\u65b9\u5f0f \u4e0d\u540c\u901a\u8baf\u65b9\u5f0f\u7684\u533a\u522b\u4f18\u7f3a\u70b9
\u50f5\u5c38\u8fdb\u7a0b
\u6b7b\u9501\u662f\u600e\u4e48\u4ea7\u751f\u7684
CPU\u7684\u6267\u884c\u65b9\u5f0f
\u4ee3\u7801\u4e2d\u9047\u5230\u8fdb\u7a0b\u963b\u585e\uff0c\u8fdb\u7a0b\u50f5\u6b7b\uff0c\u5185\u5b58\u6cc4\u6f0f\u7b49\u60c5\u51b5\u600e\u4e48\u6392\u67e5\u3002
\u6709\u6ca1\u6709\u4e86\u89e3\u8fc7\u534f\u7a0b\uff1f\u8bf4\u4e0b\u534f\u7a0b\u548c\u7ebf\u7a0b\u7684\u533a\u522b\uff1f
\u5806\u662f\u7ebf\u7a0b\u5171\u6709\u8fd8\u662f\u79c1\u6709\uff0c\u5806\u662f\u8fdb\u7a0b\u5171\u6709\u8fd8\u662f\u79c1\u6709\uff0c\u6808\u5462
\u4e86\u89e3\u8fc7\u534f\u7a0b\u5417\uff08\u6211\uff1a\u643a\u7a0b\uff1f\uff1f\uff1f\u4e0d\u4e86\u89e3\u545c\u545c\u545c\uff09
\u5171\u4eab\u5185\u5b58\u7684\u4f7f\u7528\u5b9e\u73b0\u539f\u7406\uff08\u5fc5\u8003\u5fc5\u95ee\uff0c\u7136\u540e\u5171\u4eab\u5185\u5b58\u6bb5\u88ab\u6620\u5c04\u8fdb\u8fdb\u7a0b\u7a7a\u95f4\u4e4b\u540e\uff0c\u5b58\u5728\u4e8e\u8fdb\u7a0b\u7a7a\u95f4\u7684\u4ec0\u4e48\u4f4d\u7f6e\uff1f\u5171\u4eab\u5185\u5b58\u6bb5\u6700\u5927\u9650\u5236\u662f\u591a\u5c11\uff1f\uff09
c++\u8fdb\u7a0b\u5185\u5b58\u7a7a\u95f4\u5206\u5e03\uff08\u6ce8\u610f\u5404\u90e8\u5206\u7684\u5185\u5b58\u5730\u5740\u8c01\u9ad8\u8c01\u4f4e\uff0c\u6ce8\u610f\u6808\u4ece\u9ad8\u9053\u4f4e\u5206\u914d\uff0c\u5806\u4ece\u4f4e\u5230\u9ad8\u5206\u914d\uff09
ELF\u662f\u4ec0\u4e48\uff1f\u5176\u5927\u5c0f\u4e0e\u7a0b\u5e8f\u4e2d\u5168\u5c40\u53d8\u91cf\u7684\u662f\u5426\u521d\u59cb\u5316\u6709\u4ec0\u4e48\u5173\u7cfb\uff08\u6ce8\u610f.bss\u6bb5\uff09
\u4f7f\u7528\u8fc7\u54ea\u4e9b\u8fdb\u7a0b\u95f4\u901a\u8baf\u673a\u5236\uff0c\u5e76\u8be6\u7ec6\u8bf4\u660e\uff08\u91cd\u70b9\uff09
\u591a\u7ebf\u7a0b\u548c\u591a\u8fdb\u7a0b\u7684\u533a\u522b\uff08\u91cd\u70b9 \u9762\u8bd5\u5b98\u6700\u6700\u5173\u5fc3\u7684\u4e00\u4e2a\u95ee\u9898\uff0c\u5fc5\u987b\u4ececpu\u8c03\u5ea6\uff0c\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u6570\u636e\u5171\u4eab\uff0c\u591a\u6838cup\u5229\u7528\u7387\uff0c\u8d44\u6e90\u5360\u7528\uff0c\u7b49\u7b49\u5404\u65b9\u9762\u56de\u7b54\uff0c\u7136\u540e\u6709\u4e00\u4e2a\u95ee\u9898\u5fc5\u987b\u4f1a\u88ab\u95ee\u5230\uff1a\u54ea\u4e9b\u4e1c\u897f\u662f\u4e00\u4e2a\u7ebf\u7a0b\u79c1\u6709\u7684\uff1f\u7b54\u6848\u4e2d\u5fc5\u987b\u5305\u542b\u5bc4\u5b58\u5668\uff0c\u5426\u5219\u60b2\u50ac\uff09
\u4fe1\u53f7\uff1a\u5217\u51fa\u5e38\u89c1\u7684\u4fe1\u53f7\uff0c\u4fe1\u53f7\u600e\u4e48\u5904\u7406\uff1f
i++\u662f\u5426\u539f\u5b50\u64cd\u4f5c\uff1f\u5e76\u89e3\u91ca\u4e3a\u4ec0\u4e48\uff1f\uff1f\uff1f\uff1f\uff1f\uff1f\uff1f
\u8bf4\u51fa\u4f60\u6240\u77e5\u9053\u7684\u5404\u7c7blinux\u7cfb\u7edf\u7684\u5404\u7c7b\u540c\u6b65\u673a\u5236\uff08\u91cd\u70b9\uff09\uff0c\u4ec0\u4e48\u662f\u6b7b\u9501\uff1f\u5982\u4f55\u907f\u514d\u6b7b\u9501\uff08\u6bcf\u4e2a\u6280\u672f\u9762\u8bd5\u5b98\u5fc5\u95ee\uff09
\u5217\u4e3e\u8bf4\u660elinux\u7cfb\u7edf\u7684\u5404\u7c7b\u5f02\u6b65\u673a\u5236
exit() _exit()\u7684\u533a\u522b\uff1f
\u5982\u4f55\u5b9e\u73b0\u5b88\u62a4\u8fdb\u7a0b\uff1f
linux\u7684\u5185\u5b58\u7ba1\u7406\u673a\u5236\u662f\u4ec0\u4e48\uff1f
linux\u7684\u4efb\u52a1\u8c03\u5ea6\u673a\u5236\u662f\u4ec0\u4e48\uff1f
\u6807\u51c6\u5e93\u51fd\u6570\u548c\u7cfb\u7edf\u8c03\u7528\u7684\u533a\u522b\uff1f
\u8865\u5145\u4e00\u4e2a\u5751\u7239\u5751\u7239\u5751\u7239\u5751\u7239\u7684\u95ee\u9898\uff1a\u7cfb\u7edf\u5982\u4f55\u5c06\u4e00\u4e2a\u4fe1\u53f7\u901a\u77e5\u5230\u8fdb\u7a0b\uff1f<\/p>\n\n\n\n


Linux\u7cfb\u7edf<\/h2>\n\n\n\n

linux\u7684\u5404\u79cd\u547d\u4ee4 \u7ed9\u4f60\u573a\u666f\u8ba9\u4f60\u89e3\u51b3
Linux\u4e86\u89e3\u4e48\uff0c\u67e5\u770b\u8fdb\u7a0b\u72b6\u6001ps\uff0c\u67e5\u770bcpu\u72b6\u6001 top\u3002\u67e5\u770b\u5360\u7528\u7aef\u53e3\u7684\u8fdb\u7a0b\u53f7netstat grep
Linux\u7684cpu 100\u600e\u4e48\u6392\u67e5\uff0ctop jstack\uff0c\u65e5\u5fd7\uff0cgui\u5de5\u5177
Linux\u64cd\u4f5c\u7cfb\u7edf\u4e86\u89e3\u4e48
\u600e\u4e48\u67e5\u770bCPU\u8d1f\u8f7d\uff0c\u600e\u4e48\u67e5\u770b\u4e00\u4e2a\u5ba2\u6237\u4e0b\u6709\u591a\u5c11\u8fdb\u7a0b
Linux\u5185\u6838\u662f\u600e\u4e48\u5b9e\u73b0\u5b9a\u65f6\u5668\u7684
gdb\u600e\u4e48\u67e5\u770b\u67d0\u4e2a\u7ebf\u7a0b
core dump\u6709\u6ca1\u6709\u9047\u5230\u8fc7\uff0cgdb\u600e\u4e48\u8c03\u8bd5
linux\u5982\u4f55\u8bbe\u7f6ecore\u6587\u4ef6\u751f\u6210
linux\u5982\u4f55\u8bbe\u7f6e\u5f00\u673a\u81ea\u542f\u52a8
linux\u7528\u8fc7\u54ea\u4e9b\u547d\u4ee4\u3001\u5de5\u5177
\u7528\u8fc7\u54ea\u4e9b\u5de5\u5177\u68c0\u6d4b\u7a0b\u5e8f\u6027\u80fd\uff0c\u5982\u4f55\u5b9a\u4f4d\u6027\u80fd\u74f6\u9888\u7684\u5730\u65b9
netstat tcpdump ipcs ipcrm \uff08\u5982\u679c\u8fd9\u56db\u4e2a\u547d\u4ee4\u6ca1\u542c\u8bf4\u8fc7\u6216\u8005\u4e0d\u80fd\u719f\u7ec3\u4f7f\u7528\uff0c\u57fa\u672c\u4e0a\u53ef\u4ee5\u56de\u5bb6\uff0c\u901a\u8fc7\u7684\u6982\u7387\u8f83\u5c0f ^_^ \uff0c\u8fd9\u56db\u4e2a\u547d\u4ee4\u7684\u719f\u7ec3\u638c\u63e1\u7a0b\u5ea6\u57fa\u672c\u4e0a\u80fd\u4f53\u73b0\u9762\u8bd5\u8005\u5b9e\u9645\u5f00\u53d1\u548c\u8c03\u8bd5\u7a0b\u5e8f\u7684\u7ecf\u9a8c)
cpu \u5185\u5b58 \u786c\u76d8 \u7b49\u7b49\u4e0e\u7cfb\u7edf\u6027\u80fd\u8c03\u8bd5\u76f8\u5173\u7684\u547d\u4ee4\u5fc5\u987b\u719f\u7ec3\u638c\u63e1\uff0c\u8bbe\u7f6e\u4fee\u6539\u6743\u9650 tcp\u7f51\u7edc\u72b6\u6001\u67e5\u770b \u5404\u8fdb\u7a0b\u72b6\u6001 \u6293\u5305\u76f8\u5173\u7b49\u76f8\u5173\u547d\u4ee4 \u5fc5\u987b\u719f\u7ec3\u638c\u63e1
awk sed\u9700\u638c\u63e1
gdb\u8c03\u8bd5\u76f8\u5173\u7684\u7ecf\u9a8c\uff0c\u4f1a\u88ab\u95ee\u5230<\/p>\n\n\n\n


MongoDB<\/h2>\n\n\n\n

\u5173\u4e8e\u5927\u6570\u636e\u5b58\u50a8\u7684\uff08mongodb hadoop\uff09\u5404\u79cd\u539f\u7406 mongodb\u53c8\u95ee\u7684\u6df1\u5165\u5f88\u591a<\/p>\n\n\n\n


Redis<\/h2>\n\n\n\n

Redis\u5185\u5b58\u6570\u636e\u5e93\u7684\u5185\u5b58\u6307\u7684\u662f\u5171\u4eab\u5185\u5b58\u4e48
Redis\u7684\u6301\u4e45\u5316\u65b9\u5f0f
Redis\u548cMySQL\u6709\u4ec0\u4e48\u533a\u522b\uff0c\u7528\u4e8e\u4ec0\u4e48\u573a\u666f\u3002
redis\u6709\u6ca1\u6709\u7528\u8fc7\uff0c\u5e38\u7528\u7684\u6570\u636e\u7ed3\u6784\u4ee5\u53ca\u5728\u4e1a\u52a1\u4e2d\u4f7f\u7528\u7684\u573a\u666f\uff0credis\u7684hash\u600e\u4e48\u5b9e\u73b0\u7684
\u95ee\u4e86\u4e0b\u7f13\u5b58\u66f4\u65b0\u7684\u6a21\u5f0f\uff0c\u4ee5\u53ca\u4f1a\u51fa\u73b0\u7684\u95ee\u9898\u548c\u5e94\u5bf9\u601d\u8def\uff1f
redis\u7684sentinel\u4e0a\u6295\u7968\u9009\u4e3e\u7684\u95ee\u9898 raft\u7b97\u6cd5
redis\u5355\u7ebf\u7a0b\u7ed3\u6784\u6709\u4ec0\u4e48\u4f18\u52bf\uff1f\u6709\u4ec0\u4e48\u95ee\u9898\uff1f \u4e3b\u8981\u4f18\u52bf\u5355\u7ebf\u7a0b\uff0c\u907f\u514d\u7ebf\u7a0b\u5207\u6362\u4ea7\u751f\u9759\u6001\u6d88\u8017\uff0c\u7f3a\u70b9\u662f\u5bb9\u6613\u963b\u585e\uff0c\u867d\u7136redis\u4f7f\u7528io\u590d\u7528epoll\u548c\u8f93\u5165\u7f13\u51b2\u533a\u628a\u547d\u4ee4\u6309\u7167\u961f\u5217\u5148\u8fdb\u5148\u51fa\u8f93\u5165\u7b49\u7b49
\u4f60\u89c9\u5f97\u9488\u5bf9redis\u8fd9\u4e9b\u7f3a\u70b9\u90a3\u4e9b\u547d\u4ee4\u5728redis\u4e0a\u4e0d\u53ef\u4f7f\u7528\uff1f \u6bd4\u5982keys\u3001hgetall\u7b49\u7b49\u8fd9\u4e9b\u547d\u4ee4 \u5efa\u8bae\u7528scan\u7b49\u7b49 \u8fd9\u65b9\u9762\u9610\u8ff0
\u4f60\u89c9\u5f97\u4e3a\u4ec0\u4e48\u9879\u76ee\u4e2d\u6ca1\u6709\u7528mysql\u800c\u7528\u4e86es\uff0credis\u5728\u8fd9\u91cc\u5230\u5e95\u8d77\u5230\u4e86\u4ec0\u4e48\u4f5c\u7528\uff1f\u56e0\u4e3a\u67b6\u6784\u4e0a\u8fd9\u91cc\u7406\u89e3\u4e0d\u6e05\u695a\uff0c\u6700\u540e\u56de\u7b54\u81ea\u5df1\u90fd\u89c9\u5f97\u6709\u6f0f\u6d1e\u4e86
\u4f60\u89c9\u5f97redis\u4ec0\u4e48\u7b97\u6709\u7528\uff1f \u6709\u7528\uff1f \u662f\u8bf4\u5b58\u8fdb\u53bb\u4e86\u8fd8\u662f\u8bf4\u547d\u4e2d\u7f13\u5b58\uff1f\u6700\u540e\u628a\u7f13\u5b58\u547d\u4e2d\u7387\u662f\u4ec0\u4e48\u8bf4\u4e86\u4e00\u904d
\u4f60\u4eec\u8fd9\u8fb9redis\u96c6\u7fa4\u662f\u600e\u4e48\u6837\u5b50\u7684
\u5e73\u5e38redis\u7528\u7684\u591a\u7684\u6570\u636e\u7ed3\u6784\u662f\u4ec0\u4e48\uff0c\u8df3\u8868\u5b9e\u73b0\uff0c\u600e\u4e48\u7ef4\u62a4\u7d22\u5f15\uff0c\u5f53\u65f6\u6211\u8bf4\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4e8c\u5206\uff0c\u624b\u5199\u4e8c\u5206\u7b97\u6cd5\uff0c\u5e76\u4e14\u65f6\u95f4\u590d\u6742\u5ea6\u662f\u600e\u4e48\u8ba1\u7b97\u51fa\u6765\u7684 \uff082\u7684k\u6b21\u65b9\u7b49\u4e8en k\u7b49\u4e8elogn\uff09<\/p>\n\n\n\n


MySQL<\/h2>\n\n\n\n

\u4f60\u4eec\u540e\u7aef\u7528\u4ec0\u4e48\u6570\u636e\u5e93\u505a\u6301\u4e45\u5316\u7684\uff1f\u6709\u6ca1\u6709\u7528\u5230\u5206\u5e93\u5206\u8868\uff0c\u600e\u4e48\u505a\u7684\uff1f
\u7d22\u5f15\u7684\u5e38\u89c1\u5b9e\u73b0\u65b9\u5f0f\u6709\u54ea\u4e9b\uff0c\u6709\u54ea\u4e9b\u533a\u522b?MySQL\u7684\u5b58\u50a8\u5f15\u64ce\u6709\u54ea\u4e9b\uff0c\u6709\u54ea\u4e9b\u533a\u522b\uff1fInnoDB\u4f7f\u7528\u7684\u662f\u4ec0\u4e48\u65b9\u5f0f\u5b9e\u73b0\u7d22\u5f15\uff0c\u600e\u4e48\u5b9e\u73b0\u7684\uff1f\u8bf4\u4e0b\u805a\u7c07\u7d22\u5f15\u548c\u975e\u805a\u7c07\u7d22\u5f15\u7684\u533a\u522b?
mysql\u67e5\u8be2\u4f18\u5316
MySQL\u7684\u7d22\u5f15\uff0cB+\u6811\u6027\u8d28\u3002
B+\u6811\u548cB\u6811\uff0c\u8054\u5408\u7d22\u5f15\u7b49\u539f\u7406
mysql\u7684\u60b2\u89c2\u9501\u548c\u4e50\u89c2\u9501\u533a\u522b\u548c\u5e94\u7528\uff0cABA\u95ee\u9898\u7684\u89e3\u51b3
\u9879\u76ee\u6027\u80fd\u74f6\u9888\u5728\u54ea\uff0c\u6570\u636e\u5e93\u8868\u600e\u4e48\u8bbe\u8ba1
\u5047\u8bbe\u9879\u76ee\u7684\u6027\u80fd\u74f6\u9888\u51fa\u73b0\u5728\u5199\u6570\u636e\u5e93\u4e0a\uff0c\u5e94\u8be5\u600e\u4e48\u89e3\u51b3\u5cf0\u503c\u65f6\u5199\u901f\u5ea6\u6162\u7684\u95ee\u9898
\u5047\u8bbe\u6570\u636e\u5e93\u9700\u8981\u4fdd\u5b58\u4e00\u5e74\u7684\u6570\u636e\uff0c\u6bcf\u5929\u4e00\u767e\u4e07\u6761\u6570\u636e\uff0c\u4e00\u5f20\u8868\u6700\u591a\u5b58\u4e00\u5343\u4e07\u6761\u6570\u636e\uff0c\u5e94\u8be5\u600e\u4e48\u8bbe\u8ba1\u8868
\u6570\u636e\u5e93\u81ea\u589e\u7d22\u5f15\u3002100\u53f0\u670d\u52a1\u5668\uff0c\u6bcf\u53f0\u670d\u52a1\u5668\u6709\u82e5\u5e72\u4e2a\u7528\u6237\uff0c\u7528\u6237\u6709id\uff0c\u540c\u65f6\u4f1a\u6709\u65b0\u7528\u6237\u52a0\u5165\u3002\u5b9e\u73b0id\u81ea\u589e\uff0c\u7edf\u8ba1\u7528\u6237\u4e2a\u6570\uff1f\u4e0d\u80fd\u91cd\u590d\uff0c\u597d\u50cf\u662f\u8fd9\u6837\u7684\u3002
mysql\uff0c\u4f1a\u8003sql\u8bed\u8a00\uff0c\u670d\u52a1\u5668\u6570\u636e\u5e93\u5927\u89c4\u6a21\u6570\u636e\u600e\u4e48\u8bbe\u8ba1\uff0cdb\u5404\u79cd\u6027\u80fd\u6307\u6807<\/p>\n\n\n\n


\u7b97\u6cd5<\/h2>\n\n\n\n

\u5806\u6808
\u6709\u5e8f\u6570\u7ec4\u6392\u5e8f\uff0c\u4e8c\u5206\uff0c\u590d\u6742\u5ea6
\u5e38\u89c1\u6392\u5e8f\u7b97\u6cd5\uff0c\u8bf4\u4e0b\u5feb\u6392\u8fc7\u7a0b\uff0c\u65f6\u95f4\u590d\u6742\u5ea6
\u6709N\u4e2a\u8282\u70b9\u7684\u6ee1\u4e8c\u53c9\u6811\u7684\u9ad8\u5ea6\u30021+logN
\u5982\u4f55\u5b9e\u73b0\u5173\u952e\u5b57\u8f93\u5165\u63d0\u793a\uff0c\u4f7f\u7528\u5b57\u5178\u6811\uff0c\u590d\u6742\u5ea6\u591a\u5c11\uff0c\u6709\u6ca1\u6709\u5176\u4ed6\u65b9\u6848\uff0c\u7b54\u54c8\u5e0c\uff0c\u5982\u679c\u662f\u4e2d\u6587\u5462\uff0c\u5206\u8bcd\u540e\u5efa\u7acb\u5b57\u5178\u6811\uff1f
hashmap\u7684\u5b9e\u73b0\u8bb2\u4e00\u4e0b\u5427\uff0c\u8bb2\u7684\u5f88\u8be6\u7ec6\u4e86\u3002\u8bb2\u4e00\u4e0b\u7ea2\u9ed1\u6811\u7684\u7ed3\u6784\uff0c\u67e5\u8be2\u6027\u80fd\u7b49\u3002
\u5feb\u6392\u7684\u65f6\u95f4\u590d\u6742\u5ea6\uff0c\u5192\u6ce1\u65f6\u95f4\u590d\u6742\u5ea6\uff0c\u5feb\u6392\u662f\u5426\u7a33\u5b9a\uff0c\u5feb\u6392\u7684\u8fc7\u7a0b
100w\u4e2a\u6570\uff0c\u600e\u4e48\u627e\u5230\u524d1000\u4e2a\u6700\u5927\u7684\uff0c\u5806\u6392\u5e8f\uff0c\u600e\u4e48\u6784\u9020\uff0c\u600e\u4e48\u8c03\u6574\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u3002
\u4e00\u4e2a\u77e9\u9635\uff0c\u4ece\u5de6\u4e0a\u89d2\u5230\u53f3\u4e0b\u89d2\uff0c\u6bcf\u4e2a\u4f4d\u7f6e\u6709\u4e00\u4e2a\u6743\u503c\u3002\u53ef\u4ee5\u4e0a\u4e0b\u5de6\u53f3\u8d70\uff0c\u5230\u8fbe\u53f3\u4e0b\u89d2\u7684\u8def\u5f84\u6743\u503c\u6700\u5c0f\u600e\u4e48\u8d70\u3002
\u56db\u8f86\u5c0f\u8f66\uff0c\u6bcf\u8f86\u8f66\u52a0\u6ee1\u6cb9\u53ef\u4ee5\u8d70\u4e00\u516c\u91cc\uff0c\u95ee\u600e\u4e48\u80fd\u8ba9\u4e00\u8f86\u5c0f\u8f66\u8d70\u6700\u8fdc\u3002\u8bf4\u4e86\u597d\u51e0\u79cd\u65b9\u6848\uff0c\u9762\u8bd5\u5b98\u5f15\u5bfc\u6211\u4f18\u5316\u4e86\u4e00\u4e0b\uff0c\u4f46\u662f\u8fd8\u662f\u4e0d\u6ee1\u610f\uff0c\u6700\u540e\u4ed6\u8bf4\u8df3\u8fc7\u3002
MySQL\u7684\u7d22\u5f15\uff0cB+\u6811\u6027\u8d28\u3002
\u5341\u4ebf\u548c\u6570\u627e\u5230\u524d100\u4e2a\u6700\u5927\u7684\uff0c\u5806\u6392\u5e8f\uff0c\u600e\u4e48\u5b9e\u73b0\uff0c\u600e\u4e48\u8c03\u6574\u3002
\u5e03\u9686\u8fc7\u6ee4\u5668
hash\u8868\u89e3\u51b3\u51b2\u7a81\u7684\u65b9\u6cd5
\u8df3\u8868\u63d2\u5165\u5220\u9664\u8fc7\u7a0b
\u8ba9\u4f60\u5b9e\u73b0\u4e00\u4e2a\u54c8\u5e0c\u8868\uff0c\u600e\u4e48\u505a\uff08\u5f53\u65f6\u6309\u7167Redis\u4e2d\u54c8\u5e0c\u8868\u7684\u5b9e\u73b0\u539f\u7406\u56de\u7b54\uff09<\/p>\n\n\n\n


\u8bbe\u8ba1\u6a21\u5f0f<\/h2>\n\n\n\n

\u5bf9\u4e8e\u5355\u4f8b\u6a21\u5f0f\uff0c\u6709\u4ec0\u4e48\u4f7f\u7528\u573a\u666f\u4e86\uff0c\u8bb2\u4e86\u5168\u5c40id\u751f\u6210\u5668\uff0c\u4ed6\u95ee\u6211\u5206\u5e03\u5f0fid\u751f\u6210\u5668\u600e\u4e48\u5b9e\u73b0\uff0c\u8bf4\u4e86zk\uff0c\u95ee\u6211zk\u4e86\u89e3\u539f\u7406\u4e0d\uff0c\u8bb2\u4e86zab\uff0c\u7136\u540e\u5c31\u6ca1\u95ee\u5566\u3002
\n\u9664\u4e86\u5355\u4f8b\u6a21\u5f0f\uff0c\u77e5\u9053\u9002\u914d\u5668\u6a21\u5f0f\u600e\u4e48\u5b9e\u73b0\u4e48\uff0c\u6709\u4ec0\u4e48\u7528
\n\u5206\u5e03\u5f0f\u67b6\u6784<\/p>\n\n\n\n

CAP BASE\u7406\u8bba
\n\u770b\u4f60\u9879\u76ee\u91cc\u9762\u7528\u4e86etcd\uff0c\u8bb2\u89e3\u4e0betcd\u5e72\u4ec0\u4e48\u7528\u7684\uff0c\u600e\u4e48\u4fdd\u8bc1\u9ad8\u53ef\u7528\u548c\u4e00\u81f4\u6027\uff1f
\n\u65e2\u7136\u4f60\u63d0\u5230\u4e86raft\u7b97\u6cd5\uff0c\u8bb2\u4e0braft\u7b97\u6cd5\u7684\u57fa\u672c\u6d41\u7a0b\uff1fraft\u7b97\u6cd5\u91cc\u9762\u5982\u679c\u51fa\u73b0\u8111\u88c2\u600e\u4e48\u5904\u7406\uff1f\u6709\u6ca1\u6709\u4e86\u89e3\u8fc7paxos\u548czookeeper\u7684zab\u7b97\u6cd5\uff0c\u4ed6\u4eec\u4e4b\u524d\u6709\u5565\u533a\u522b\uff1f
\nrpc\u6709\u6ca1\u6709\u4e86\u89e3
\n\u7cfb\u7edf\u8bbe\u8ba1<\/p>\n\n\n\n

\u670b\u53cb\u4e4b\u95f4\u7684\u70b9\u5bf9\u70b9\u5173\u7cfb\u7528\u56fe\u7ef4\u62a4\uff0c\u600e\u4e48\u5224\u65ad\u4e24\u4eba\u662f\u5426\u662f\u670b\u53cb\uff0c\u5e76\u67e5\u96c6\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\uff0c\u8fc7\u7a0b\u3002
10g\u6587\u4ef6\uff0c\u53ea\u67092g\u5185\u5b58\uff0c\u600e\u4e48\u67e5\u627e\u6587\u4ef6\u4e2d\u6307\u5b9a\u7684\u5b57\u7b26\u4e32\u51fa\u73b0\u4f4d\u7f6e\u3002
Linux\u5927\u6587\u4ef6\u600e\u4e48\u67e5\u67d0\u4e00\u884c\u7684\u5185\u5bb9\u3002
\u79d2\u6740\u7cfb\u7edf\u7684\u67b6\u6784\u8bbe\u8ba1
\u5341\u4ebf\u4e2a\u6570\u7684\u96c6\u5408\u548c10w\u4e2a\u6570\u7684\u96c6\u5408\uff0c\u5982\u4f55\u6c42\u5b83\u4eec\u7684\u4ea4\u96c6\u3002
\u56de\u5230\u7f51\u7edc\uff0c\u521a\u624d\u4f60\u8bf4\u5230\u76f4\u64ad\u573a\u666f\uff0c\u77e5\u9053\u76f4\u64ad\u7684\u67b6\u6784\u600e\u4e48\u8bbe\u8ba1\u4e48\uff0c\u8981\u70b9\u662f\u4ec0\u4e48\uff0c\u8bf4\u4e86\u51e0\u4e2a\u4e0d\u592a\u5bf9\uff0c\u4ed6\u8bf4\u8981\u907f\u514d\u5e7f\u64ad\u98ce\u66b4\uff0c\u7b54\u4e0d\u4f1a\u3002
\u9488\u5bf9\u81ea\u5df1\u6700\u719f\u6089\u7684\u9879\u76ee\uff0c\u753b\u51fa\u9879\u76ee\u7684\u67b6\u6784\u56fe\uff0c\u4e3b\u8981\u7684\u6570\u636e\u8868\u7ed3\u6784\uff0c\u9879\u76ee\u4e2d\u4f7f\u7528\u5230\u7684\u6280\u672f\u70b9\uff0c\u9879\u76ee\u7684\u603b\u5cf0\u503cqps\uff0c\u65f6\u5ef6\uff0c\u4ee5\u53ca\u6709\u6ca1\u6709\u5206\u6790\u8fc7\u65f6\u5ef6\u51fa\u73b0\u7684\u8017\u65f6\u5206\u522b\u51fa\u73b0\u5728\u4ec0\u4e48\u5730\u65b9\uff0c\u9879\u76ee\u6709\u5565\u6539\u8fdb\u7684\u5730\u65b9\u6ca1\u6709\uff1f
\u5982\u679c\u8bf7\u6c42\u51fa\u73b0\u95ee\u9898\u6ca1\u6709\u54cd\u5e94\uff0c\u5982\u4f55\u5b9a\u4f4d\u95ee\u9898\uff0c\u8bf4\u4e0b\u601d\u8def\uff1f
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