{"id":2078,"date":"2023-04-01T21:47:59","date_gmt":"2023-04-01T13:47:59","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=2078"},"modified":"2023-04-06T16:00:17","modified_gmt":"2023-04-06T08:00:17","slug":"because-of-bitmap-8-servers-were-added-for-nothing","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/04\/01\/because-of-bitmap-8-servers-were-added-for-nothing\/","title":{"rendered":"\u56e0\u4e3aBitMap\uff0c\u767d\u767d\u642d\u8fdb\u53bb8\u53f0\u670d\u52a1\u5668…"},"content":{"rendered":"

\u4e1a\u52a1\u80cc\u666f<\/h2>\n

\u6700\u8fd1\uff0c\u56e0\u4e3a\u589e\u52a0\u4e86\u4e00\u4e9b\u98ce\u63a7\u63aa\u65bd\uff0c\u5bfc\u81f4\u65b0\u4eba\u62fc\u56e2\u8ba2\u5355\u63a5\u53e3\u7684 QPS\u3001TPS \u4e0b\u964d\u4e86\u7ea6 5%~10%\uff0c\u8fd9\u8fd8\u4e86\u5f97\uff01<\/p>\n

\u9996\u5148\uff0c\u5feb\u901f\u89e3\u91ca\u4e00\u4e0b\u3010\u65b0\u4eba\u62fc\u56e2\u3011\u6d3b\u52a8\uff1a<\/p>\n

<\/p>\n

\u4e1a\u52a1\u7b80\u4ecb<\/strong> \uff1a\u987e\u540d\u601d\u4e49\uff0c\u65b0\u4eba\u62fc\u56e2\u662f\u7531\u65b0\u7528\u6237\u53d1\u8d77\u7684\u62fc\u56e2\uff0c\u5982\u679c\u62fc\u56e2\u6210\u529f\uff0c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u5956\u52b1\u65b0\u7528\u6237\u4e00\u5f20\u6ee1 15.1 \u5143\u51cf 15 \u7684\u5e73\u53f0\u4f18\u60e0\u5238\u3002\u8fd9\u76f8\u5f53\u4e8e\u662f\u65e0\u95e8\u69db\u4f18\u60e0\u4e86\u3002\u6bcf\u4e2a\u7528\u6237\u4ec5\u6709\u4e00\u6b21\u673a\u4f1a\u3002\u65b0\u4eba\u62fc\u56e2\u6d3b\u52a8\u7684\u6700\u5927\u76ee\u7684\u4e3b\u8981\u662f\u4e3a\u4e86\u62c9\u65b0\u3002<\/p>\n

\u65b0\u7528\u6237\u5224\u65ad\u6807\u51c6<\/strong> \uff1a\u662f\u5426\u6709\u652f\u4ed8\u6210\u529f\u7684\u8ba2\u5355 ? \u4e0d\u662f\u65b0\u7528\u6237 : \u662f\u65b0\u7528\u6237\u3002<\/p>\n

\u5f53\u524d\u95ee\u9898<\/strong> \uff1a\u7531\u4e8e\u50cf\u8fd9\u79cd\u4f18\u60e0\u529b\u5ea6\u8f83\u5927\u7684\u6d3b\u52a8\u5f88\u5bb9\u6613\u88ab\u7f8a\u6bdb\u515a\u3001\u9ed1\u4ea7\u76ef\u4e0a\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5b8c\u5584\u4e86\u8ba2\u5355\u98ce\u63a7\u7cfb\u7edf\uff0c\u8ba9\u9ed1\u4ea7\u65e0\u5904\u9041\u5f62\uff01<\/p>\n

\u7136\u800c\u7531\u4e8e\u9700\u8981\u540c\u6b65\u8c03\u7528\u98ce\u63a7\u7cfb\u7edf\uff0c\u5bfc\u81f4\u6574\u4e2a\u4e0b\u5355\u63a5\u53e3\u7684\u7684 QPS\u3001TPS \u7684\u6307\u6807\u7686\u6709\u4e0b\u964d\uff0c\u4ece\u6027\u80fd\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u3010\u65b0\u4eba\u62fc\u56e2\u4e0b\u5355\u63a5\u53e3\u3011\u65e0\u6cd5\u6ee1\u8db3\u6027\u80fd\u6307\u6807\u8981\u6c42\u3002\u56e0\u6b64 CTO \u6307\u540d\u70b9\u59d3\u8ba9\u6211\u5e26\u5934\u51b2\u950b\u2026\u2026\u51b2\u554a\uff01<\/p>\n

\u95ee\u9898\u5206\u6790<\/h2>\n

\u98ce\u63a7\u7cfb\u7edf\u7684\u5224\u65ad\u4e00\u822c\u5206\u4e3a\u4e24\u79cd\uff1a\u5728\u7ebf\u540c\u6b65\u5206\u6790\u548c\u79bb\u7ebf\u5f02\u6b65\u5206\u6790\u3002\u5728\u5b9e\u9645\u4e1a\u52a1\u4e2d\uff0c\u8fd9\u4e24\u8005\u90fd\u662f\u5fc5\u8981\u7684\u3002<\/p>\n

\u5728\u7ebf\u540c\u6b65\u5206\u6790\u53ef\u4ee5\u5728\u4e0b\u5355\u5165\u53e3\u5904\u5c31\u62e6\u622a\u6389\u98ce\u9669\uff0c\u800c\u79bb\u7ebf\u5f02\u6b65\u5206\u6790\u53ef\u4ee5\u63d0\u4f9b\u66f4\u52a0\u5168\u9762\u7684\u98ce\u9669\u5224\u65ad\u57fa\u7840\u6570\u636e\u548c\u98ce\u9669\u76d1\u63a7\u80fd\u529b\u3002<\/p>\n

\u6700\u8fd1\u6211\u4eec\u5bf9\u5728\u7ebf\u540c\u6b65\u8fd9\u5757\u7684\u98ce\u63a7\u89c4\u5219\u8fdb\u884c\u4e86\u52a0\u5f3a\u548c\u4f18\u5316\uff0c\u5bfc\u81f4\u6574\u4e2a\u65b0\u4eba\u62fc\u56e2\u4e0b\u5355\u63a5\u53e3\u7684\u6267\u884c\u94fe\u8def\u66f4\u957f\uff0c\u4ece\u800c\u5bfc\u81f4 TPS \u548c QPS \u8fd9\u4e24\u4e2a\u5173\u952e\u6307\u6807\u4e0b\u964d\u3002<\/p>\n

\u89e3\u51b3\u601d\u8def<\/h2>\n

\u8981\u63d0\u5347\u6027\u80fd\uff0c\u6700\u7b80\u5355\u7c97\u66b4\u7684\u65b9\u6cd5\u662f\u52a0\u670d\u52a1\u5668\uff01\u7136\u800c\uff0c\u65e0\u8111\u52a0\u670d\u52a1\u5668\u65e0\u6cd5\u5c55\u793a\u51fa\u4e00\u4e2a\u51fa\u8272\u7684\u7a0b\u5e8f\u5458\u7684\u80fd\u529b\u3002CTO \u8bf4\u4e86\uff0c\u8981\u52a0\u670d\u52a1\u5668\u53ef\u4ee5\uff0c\u4e70\u670d\u52a1\u5668\u7684\u94b1\u4ece\u6211\u5de5\u8d44\u91cc\u9762\u6263\u2026\u2026<\/p>\n

\u5728\u6d4b\u8bd5\u73af\u5883\u4e2d\uff0c\u6211\u4eec\u7b80\u5355\u7684\u901a\u8fc7\u4f7f\u7528 StopWatch \u6765\u7b80\u5355\u5206\u6790\uff0c\u4f2a\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

@Transactional(rollbackFor = Exception.class)\npublic CollageOrderResponseVO colleageOrder(CollageOrderRequestVO request) {\n    StopWatch stopWatch = new StopWatch();\n\n    stopWatch.start("\u8c03\u7528\u98ce\u63a7\u7cfb\u7edf\u63a5\u53e3");\n    \/\/ \u8c03\u7528\u98ce\u63a7\u7cfb\u7edf\u63a5\u53e3, http\u8c03\u7528\u65b9\u5f0f\n    stopWatch.stop();\n\n    stopWatch.start("\u83b7\u53d6\u62fc\u56e2\u6d3b\u52a8\u4fe1\u606f"); \/\/ \n    \/\/ \u83b7\u53d6\u62fc\u56e2\u6d3b\u52a8\u57fa\u672c\u4fe1\u606f. \u67e5\u8be2\u7f13\u5b58\n    stopWatch.stop();\n\n    stopWatch.start("\u83b7\u53d6\u7528\u6237\u57fa\u672c\u4fe1\u606f");\n    \/\/ \u83b7\u53d6\u7528\u6237\u57fa\u672c\u4fe1\u606f\u3002http\u8c03\u7528\u7528\u6237\u670d\u52a1\n    stopWatch.stop();\n\n    stopWatch.start("\u5224\u65ad\u662f\u5426\u662f\u65b0\u7528\u6237");\n    \/\/ \u5224\u65ad\u662f\u5426\u662f\u65b0\u7528\u6237\u3002 \u67e5\u8be2\u8ba2\u5355\u6570\u636e\u5e93\n    stopWatch.stop();\n\n    stopWatch.start("\u751f\u6210\u8ba2\u5355\u5e76\u5165\u5e93");\n    \/\/ \u751f\u6210\u8ba2\u5355\u5e76\u5165\u5e93\n    stopWatch.stop();\n\n    \/\/ \u6253\u5370task\u62a5\u544a\n    stopWatch.prettyPrint();\n\n   \/\/ \u53d1\u5e03\u8ba2\u5355\u521b\u5efa\u6210\u529f\u4e8b\u4ef6\u5e76\u6784\u5efa\u54cd\u5e94\u6570\u636e\n    return new CollageOrderResponseVO();\n}<\/code><\/pre>\n
\u6267\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
StopWatch '\u65b0\u4eba\u62fc\u56e2\u8ba2\u5355StopWatch': running time = 1195896800 ns\n---------------------------------------------\nns         %     Task name\n---------------------------------------------\n014385000  021%  \u8c03\u7528\u98ce\u63a7\u7cfb\u7edf\u63a5\u53e3\n010481800  010%  \u83b7\u53d6\u62fc\u56e2\u6d3b\u52a8\u4fe1\u606f\n013989200  015%  \u83b7\u53d6\u7528\u6237\u57fa\u672c\u4fe1\u606f\n028314600  030%  \u5224\u65ad\u662f\u5426\u662f\u65b0\u7528\u6237\n028726200  024%  \u751f\u6210\u8ba2\u5355\u5e76\u5165\u5e93<\/code><\/pre>\n
\u5728\u6d4b\u8bd5\u73af\u5883\u6574\u4e2a\u63a5\u53e3\u7684\u6267\u884c\u65f6\u95f4\u5728 1.2s \u5de6\u53f3\u3002\u5176\u4e2d\u6700\u8017\u65f6\u7684\u6b65\u9aa4\u662f\u3010\u5224\u65ad\u662f\u5426\u662f\u65b0\u7528\u6237\u3011\u903b\u8f91\u3002<\/p>\n
\u8fd9\u662f\u6211\u4eec\u91cd\u70b9\u4f18\u5316\u7684\u5730\u65b9\uff08\u5b9e\u9645\u4e0a\uff0c\u4e5f\u53ea\u80fd\u9488\u5bf9\u8fd9\u70b9\u8fdb\u884c\u4f18\u5316\uff0c\u56e0\u4e3a\u5176\u4ed6\u6b65\u9aa4\u903b\u8f91\u57fa\u672c\u4e0a\u65e0\u4f18\u5316\u7a7a\u95f4\u4e86\uff09\u3002<\/p>\n
\u786e\u5b9a\u65b9\u6848<\/h2>\n
\u5728\u8fd9\u4e2a\u63a5\u53e3\u4e2d\uff0c\u3010\u5224\u65ad\u662f\u5426\u662f\u65b0\u7528\u6237\u3011\u7684\u6807\u51c6\u662f\u662f\u7528\u6237\u662f\u5426\u6709\u652f\u4ed8\u6210\u529f\u7684\u8ba2\u5355\u3002\u56e0\u6b64\u5f00\u53d1\u4eba\u5458\u60f3\u5f53\u7136\u7684\u6839\u636e\u7528\u6237 ID \u53bb\u8ba2\u5355\u6570\u636e\u5e93\u4e2d\u67e5\u8be2\u3002<\/p>\n
\u7136\u800c\u968f\u7740\u4e1a\u52a1\u7684\u79ef\u7d2f\uff0c\u8ba2\u5355\u4e3b\u5e93\u7684\u6570\u636e\u65e9\u5c31\u7a81\u7834\u4e86\u5343\u4e07\u7ea7\u522b\u4e86\uff0c\u867d\u7136\u4f1a\u5b9a\u65f6\u8fc1\u79fb\u6570\u636e\uff0c\u7136\u800c\u8ba2\u5355\u91cf\u7a81\u7834\u5343\u4e07\u5927\u5173\u7684\u5468\u671f\u8d8a\u6765\u8d8a\u77ed\u2026\u2026\uff08\u5206\u5e93\u5206\u8868\u65b9\u6848\u662f\u65f6\u5019\u63d0\u4e0a\u8bae\u7a0b\u4e86\uff0c\u6b64\u6b21\u573a\u666f\u6682\u4e0d\u8ba8\u8bba\u5206\u5e93\u5206\u8868\u7684\u5185\u5bb9\uff09\u800c\u7528\u6237 ID \u867d\u7136\u662f\u7d22\u5f15\uff0c\u4f46\u6bd5\u7adf\u4e0d\u662f\u552f\u4e00\u7d22\u5f15\u3002\u56e0\u6b64\u67e5\u8be2\u6548\u7387\u76f8\u6bd4\u4e8e\u5176\u4ed6\u903b\u8f91\u8981\u66f4\u8017\u65f6\u3002<\/p>\n
\u901a\u8fc7\u7b80\u5355\u5206\u6790\u53ef\u4ee5\u77e5\u9053\uff0c\u5176\u5b9e\u53ea\u9700\u8981\u77e5\u9053\u8fd9\u4e2a\u7528\u6237\u662f\u5426\u6709\u652f\u4ed8\u6210\u529f\u7684\u8ba2\u5355\uff0c\u81f3\u4e8e\u652f\u4ed8\u6210\u529f\u4e86\u51e0\u5355\u6211\u4eec\u5e76\u4e0d\u5173\u5fc3\u3002<\/p>\n
\u56e0\u6b64\u6b64\u573a\u666f\u663e\u7136\u9002\u5408\u4f7f\u7528 Redis \u7684 BitMap \u6570\u636e\u7ed3\u6784\u6765\u89e3\u51b3\u3002\u5728\u652f\u4ed8\u6210\u529f\u65b9\u6cd5\u7684\u903b\u8f91\u4e2d\uff0c\u6211\u4eec\u7b80\u5355\u52a0\u4e00\u884c\u4ee3\u7801\u6765\u8bbe\u7f6e BitMap\uff1a<\/p>\n
\/\/ \u8bf4\u660e\uff1akey\u8868\u793a\u7528\u6237\u662f\u5426\u5b58\u5728\u652f\u4ed8\u6210\u529f\u7684\u8ba2\u5355\u6807\u8bb0\n\/\/ userId\u662flong\u7c7b\u578b\nString key = "order:f:paysucc"; \nredisTemplate.opsForValue().setBit(key, userId, true);<\/code><\/pre>\n
\u901a\u8fc7\u8fd9\u4e00\u756a\u6539\u9020\uff0c\u5728\u4e0b\u5355\u65f6\u3010\u5224\u65ad\u662f\u5426\u662f\u65b0\u7528\u6237\u3011\u7684\u6838\u5fc3\u4ee3\u7801\u5c31\u4e0d\u9700\u8981\u67e5\u5e93\u4e86\uff0c\u800c\u662f\u6539\u4e3a\uff1a<\/p>\n
Boolean paySuccFlag = redisTemplate.opsForValue().getBit(key, userId);\nif (paySuccFlag != null && paySuccFlag) {\n    \/\/ \u4e0d\u662f\u65b0\u7528\u6237,\u4e1a\u52a1\u5f02\u5e38\n}<\/code><\/pre>\n
\u4fee\u6539\u4e4b\u540e\uff0c\u5728\u6d4b\u8bd5\u73af\u5883\u7684\u6d4b\u8bd5\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
StopWatch '\u65b0\u4eba\u62fc\u56e2\u8ba2\u5355StopWatch': running time = 82207200 ns\n---------------------------------------------\nns         %     Task name\n---------------------------------------------\n014113100  017%  \u8c03\u7528\u98ce\u63a7\u7cfb\u7edf\u63a5\u53e3\n010193800  012%  \u83b7\u53d6\u62fc\u56e2\u6d3b\u52a8\u4fe1\u606f\n013965900  017%  \u83b7\u53d6\u7528\u6237\u57fa\u672c\u4fe1\u606f\n014532800  018%  \u5224\u65ad\u662f\u5426\u662f\u65b0\u7528\u6237\n029401600  036%  \u751f\u6210\u8ba2\u5355\u5e76\u5165\u5e93<\/code><\/pre>\n
\u6d4b\u8bd5\u73af\u5883\u4e0b\u5355\u65f6\u95f4\u53d8\u6210\u4e86 0.82s\uff0c\u4e3b\u8981\u6027\u80fd\u635f\u8017\u5728\u751f\u6210\u8ba2\u5355\u5165\u5e93\u6b65\u9aa4\uff0c\u8fd9\u91cc\u6d89\u53ca\u5230\u4e8b\u52a1\u548c\u6570\u636e\u5e93\u63d2\u5165\u6570\u636e\uff0c\u56e0\u6b64\u662f\u5408\u7406\u7684\u3002\u63a5\u53e3\u54cd\u5e94\u65f6\u957f\u7f29\u77ed\u4e86 31%\uff01\u76f8\u6bd4\u751f\u4ea7\u73af\u5883\u7684\u6027\u80fd\u6548\u679c\u66f4\u660e\u663e\u2026\u2026\u63a5\u7740\u821e\uff01<\/p>\n
\u6674\u5929\u9739\u96f3<\/h2>\n
\u8fd9\u6b21\u7684\u4f18\u5316\u6548\u679c\u5341\u5206\u660e\u663e\uff0c\u60f3\u7740 CTO \u8be5\u7ed9\u6211\u52a0\u70b9\u7ee9\u6548\u4e86\u5427\uff0c\u4e0d\u7136\u6211\u5de5\u8d44\u8981\u88ab\u6263\u5b8c\u4e86\u5440~<\/p>\n
\u4e00\u8fb9\u8fd9\u6837\u60f3\u7740\uff0c\u4e00\u8fb9\u51c6\u5907\u751f\u4ea7\u73af\u5883\u7070\u5ea6\u53d1\u5e03\u3002\u53d1\u5b8c\u7248\u4e4b\u540e\uff0c\u51c6\u5907\u6765\u4e2a\u845b\u4f18\u8eba\u597d\u597d\u4f11\u606f\u4e00\u4e0b\uff0c\u7b49\u7740\u6d4b\u8bd5\u59b9\u5b50\u9a8c\u8bc1\u5b8c\u5c31\u4e0b\u73ed\u8d70\u4eba\u3002<\/p>\n
\u7136\u800c\u5728\u6211\u8eba\u4e0b\u4e0d\u5230 1 \u5206\u949f\u7684\u65f6\u95f4\uff0c\u6d4b\u8bd5\u59b9\u5b50\u8fc7\u6765\u7d27\u5f20\u7684\u8ddf\u6211\u8bf4\uff1a\u201c\u63a5\u53e3\u62a5\u9519\u4e86\uff0c\u4f60\u5feb\u770b\u770b\uff01\u201dWhat?<\/p>\n
\u5f53\u6211\u6253\u5f00\u65e5\u5fd7\u4e00\u770b\uff0c\u7acb\u9a6c\u50bb\u773c\u4e86\u3002\u62a5\u9519\u65e5\u5fd7\u5982\u4e0b\uff1a<\/p>\n
io.lettuce.core.RedisCommandExecutionException: ERR bit offset is not an integer or out of range\nat io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:135) ~[lettuce-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]\nat io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:108) ~[lettuce-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]\nat io.lettuce.core.protocol.AsyncCommand.completeResult(AsyncCommand.java:120) ~[lettuce-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]\nat io.lettuce.core.protocol.AsyncCommand.complete(AsyncCommand.java:111) ~[lettuce-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]\nat io.lettuce.core.protocol.CommandHandler.complete(CommandHandler.java:654) ~[lettuce-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]\nat io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:614) ~[lettuce-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]\n\u2026\u2026\u2026\u2026<\/code><\/pre>\n
bit offset is not an integer or out of range<\/code>\u3002\u8fd9\u4e2a\u9519\u8bef\u63d0\u793a\u5df2\u7ecf\u5f88\u660e\u663e\uff1a\u6211\u4eec\u7684 offset \u53c2\u6570 out of range\u3002<\/p>\n
\u4e3a\u4ec0\u4e48\u4f1a\u8fd9\u6837\u5462\uff1f\u6211\u4e0d\u7981\u5f00\u59cb\u601d\u7d22\u8d77\u6765\uff1aRedis BitMap \u7684\u5e95\u5c42\u6570\u636e\u7ed3\u6784\u5b9e\u9645\u4e0a\u662f String \u7c7b\u578b\uff0cRedis \u5bf9\u4e8e String \u7c7b\u578b\u6709\u6700\u5927\u503c\u9650\u5236\u4e0d\u5f97\u8d85\u8fc7 512M\uff0c\u5373 2^32 \u6b21\u65b9 byte\u2026\u2026\u2026\u2026\u6211\u9760\uff01\uff01\uff01<\/p>\n
\u604d\u7136\u5927\u609f<\/h2>\n
\u7531\u4e8e\u6d4b\u8bd5\u73af\u5883\u5386\u53f2\u539f\u56e0\uff0cuserId \u7684\u957f\u5ea6\u90fd\u662f 8 \u4f4d\u7684\uff0c\u6700\u5927\u503c 99999999\uff0c\u5047\u8bbe offset \u5c31\u53d6\u8fd9\u4e2a\u6700\u5927\u503c\u3002<\/p>\n
\u90a3\u4e48\u5728 Bitmap \u4e2d\uff0cbitarray=999999999=2^29byte<\/code>\u3002\u56e0\u6b64 setbit \u6ca1\u6709\u62a5\u9519\u3002<\/p>\n
\u800c\u751f\u4ea7\u73af\u5883\u7684 userId\uff0c\u7ecf\u8fc7\u6392\u67e5\u53d1\u73b0\u7528\u6237\u4e2d\u5fc3\u751f\u6210 ID \u7684\u89c4\u5219\u53d8\u4e86\uff0c\u5bfc\u81f4\u4ee5\u524d\u5f88\u8001\u7684\u7528\u6237\u7684 id \u957f\u5ea6\u662f 8 \u4f4d\u7684\uff0c\u65b0\u6ce8\u518c\u7684\u7528\u6237 id \u90fd\u662f 18 \u4f4d\u7684\u3002<\/p>\n
\u4ee5\u6d4b\u8bd5\u59b9\u5b50\u7684\u8d26\u53f7 id \u4e3a\u4f8b\uff1a652024209997893632=2^59byte<\/code>\uff0c\u8fd9\u663e\u7136\u8d85\u51fa\u4e86 Redis \u7684\u6700\u5927\u503c\u8981\u6c42\u3002\u4e0d\u62a5\u9519\u624d\u602a\uff01<\/p>\n
\u7d27\u6025\u56de\u9000\u7248\u672c\uff0c\u7070\u5ea6\u53d1\u5e03\u5931\u8d25\uff0c\u8fd8\u597d\uff0cCTO \u5ff5\u6211\u4e0d\u77e5\u9053\u4ee5\u524d\u7684\u8fd9\u4e9b\u4e1a\u52a1\u89c4\u5219\uff0c\u653e\u4e86\u6211\u4e00\u9a6c~ \u8be5\u6b7b\uff0c\u8fd8\u60f3\u7740\u52a0\u7ee9\u6548\uff0c\u6ca1\u6709\u6263\u7ee9\u6548\u5c31\u662f\u4e07\u5e78\u7684\u4e86\uff01<\/p>\n
\u672c\u6b21\u4e8b\u4ef6\u66b4\u9732\u51fa\u51e0\u4e2a\u975e\u5e38\u503c\u5f97\u6ce8\u610f\u7684\u95ee\u9898\uff0c\u503c\u5f97\u53cd\u601d\uff1a<\/p>\n
\u2460 \u61c2\u6280\u672f\u4f53\u7cfb\uff0c\u8fd8\u8981\u61c2\u4e1a\u52a1\u4f53\u7cfb<\/strong><\/p>\n
\u5bf9\u4e8e BitMap \u7684\u4f7f\u7528\uff0c\u6211\u4eec\u662f\u975e\u5e38\u719f\u6089\u7684\uff0c\u5bf9\u4e8e\u591a\u6570\u9ad8\u7ea7\u5f00\u53d1\u4eba\u5458\u800c\u8a00\uff0c\u4ed6\u4eec\u7684\u6280\u672f\u6c34\u5e73\u4e5f\u4e0d\u5dee\uff0c\u4f46\u662f\u56e0\u4e3a\u4e0d\u540c\u4e1a\u52a1\u4f53\u7cfb\u7684\u53d8\u8fc1\u800c\u65e0\u6cd5\u8bc4\u4f30\u51fa\u7cbe\u51c6\u7684\u5f71\u54cd\u8303\u56f4\uff0c\u5bfc\u81f4\u65e0\u5f62\u7684\u5b89\u5168\u9690\u60a3\u3002<\/p>\n
\u672c\u6b21\u4e8b\u4ef6\u5c31\u662f\u56e0\u4e3a\u6ca1\u6709\u4e86\u89e3\u5230\u7528\u6237\u4e2d\u5fc3\u7684 ID \u89c4\u5219\u53d8\u5316\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u8981\u53d8\u5316\u4ece\u800c\u5bfc\u81f4\u95ee\u9898\u53d1\u751f\u3002<\/p>\n
\u2461 \u9884\u751f\u4ea7\u73af\u5883\u7684\u5fc5\u8981\u6027\u548c\u91cd\u8981\u6027<\/strong><\/p>\n
\u5bfc\u81f4\u672c\u6b21\u95ee\u9898\u7684\u53e6\u4e00\u4e2a\u539f\u56e0\uff0c\u5c31\u662f\u56e0\u4e3a\u6ca1\u6709\u9884\u751f\u4ea7\u73af\u5883\uff0c\u5bfc\u81f4\u65e0\u6cd5\u771f\u6b63\u6a21\u62df\u751f\u4ea7\u73af\u5883\u7684\u771f\u5b9e\u573a\u666f\uff0c\u5982\u679c\u80fd\u6709\u9884\u751f\u4ea7\u73af\u5883\uff0c\u90a3\u4e48\u81f3\u5c11\u53ef\u4ee5\u62e5\u6709\u751f\u4ea7\u73af\u5883\u7684\u57fa\u7840\u6570\u636e\uff1a\u7528\u6237\u6570\u636e\u3001\u6d3b\u52a8\u6570\u636e\u7b49\u3002<\/p>\n
\u5f88\u5927\u7a0b\u5ea6\u4e0a\u80fd\u591f\u63d0\u524d\u66b4\u9732\u95ee\u9898\u5e76\u89e3\u51b3\u3002\u4ece\u800c\u63d0\u5347\u6b63\u5f0f\u73af\u5883\u53d1\u7248\u7684\u6548\u7387\u548c\u8d28\u91cf\u3002<\/p>\n
\u2462 \u656c\u754f\u5fc3<\/strong><\/p>\n
\u8981\u77e5\u9053\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u5927\u578b\u7684\u9879\u76ee\u800c\u8a00\uff0c\u4efb\u4f55\u4e00\u884c\u4ee3\u7801\u5176\u80cc\u540e\u90fd\u6709\u5176\u5b58\u5728\u7684\u4ef7\u503c\uff1a\u6b63\u6240\u8c13\u5b58\u5728\u5373\u5408\u7406\u3002<\/p>\n
\u522b\u4eba\u4e0d\u4f1a\u65e0\u7f18\u65e0\u6545\u8fd9\u6837\u5199\u3002\u5982\u679c\u4f60\u89c9\u5f97\u4e0d\u5408\u7406\uff0c\u90a3\u4e48\u9700\u8981\u901a\u8fc7\u5145\u5206\u7684\u8c03\u7814\u548c\u4e86\u89e3\uff0c\u786e\u5b9a\u6bcf\u4e00\u4e2a\u53c2\u6570\u80cc\u540e\u7684\u610f\u4e49\u548c\u8bbe\u8ba1\u53d8\u66f4\u7b49\u3002\u4ee5\u5c3d\u53ef\u80fd\u964d\u4f4e\u72af\u9519\u7684\u51e0\u7387\u3002<\/p>\n
\u540e\u8bb0<\/h2>\n
\u901a\u8fc7\u6b64\u6b21\u4e8b\u4ef6\uff0c\u672c\u6765\u60f3\u7740\u4f18\u5316\u80fd\u591f\u63d0\u5347\u63a5\u53e3\u6548\u7387\uff0c\u4ece\u800c\u4e0d\u9700\u8981\u52a0\u670d\u52a1\u5668\u3002\u8fd9\u4e0b\u597d\u4e86\uff0c\u4e0d\u4ec5\u751f\u4ea7\u73af\u5883\u8981\u52a0 1 \u53f0\u670d\u52a1\u5668\u4ee5\u4e34\u65f6\u89e3\u51b3\u6027\u80fd\u6307\u6807\u4e0d\u8fbe\u6807\u7684\u95ee\u9898\uff0c\u8fd8\u8981\u53e6\u5916\u52a0 7 \u53f0\u670d\u52a1\u5668\u7528\u4e8e\u9884\u751f\u4ea7\u73af\u5883\u7684\u642d\u5efa\uff01<\/p>\n
\u56e0\u4e3a BitMap\uff0c\u642d\u8fdb\u53bb\u4e86 8 \u53f0\u670d\u52a1\u5668\u3002\u75db\u5e76\u503c\u5f97\u3002\u63a5\u7740\u594f\u4e50\uff0c\u63a5\u7740\u821e~~~<\/p>\n
\n
\u8f6c\u8f7d\u81f3\uff1ahttps:\/\/juejin.cn\/post\/6854573218322513933<\/a><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"
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