{"id":1381,"date":"2018-06-17T15:30:52","date_gmt":"2018-06-17T07:30:52","guid":{"rendered":"https:\/\/damogame.cn:15443\/wordpress\/?p=1381"},"modified":"2018-06-17T15:30:52","modified_gmt":"2018-06-17T07:30:52","slug":"%e5%9c%a8%e5%85%b1%e4%ba%ab%e5%86%85%e5%ad%98%e5%ae%9e%e7%8e%b0-redis%ef%bc%88%e4%b8%8a%ef%bc%89","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/1381","title":{"rendered":"\u5728\u5171\u4eab\u5185\u5b58\u5b9e\u73b0 Redis\uff08\u4e0a\uff09"},"content":{"rendered":"<h1 class=\"col-article-title\">\u5728\u5171\u4eab\u5185\u5b58\u5b9e\u73b0 Redis\uff08\u4e0a\uff09<\/h1>\n<div class=\"col-markdown-nav absolute\">\n<h2 class=\"nav-title\">\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff1a<\/h2>\n<ul class=\"col-markdown-nav-list\">\n<li><a title=\"\u80cc\u666f\" data-key=\"2.1\">\u80cc\u666f<\/a><\/li>\n<li><a title=\"\u9700\u6c42\" data-key=\"2.2\">\u9700\u6c42<\/a><\/li>\n<li><a title=\"\u5185\u5b58\u7ba1\u7406\u673a\u5236\" 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class=\"image-block\"><img decoding=\"async\" class=\"\" src=\"https:\/\/blog-10039692.file.myqcloud.com\/1504768981644_9255_1504768981982.jpg\" \/><\/div>\n<\/figure>\n<p>\u5982\u56fe\u662f\u4e00\u5757\u5171\u4eab\u5185\u5b58\u7a7a\u95f4\uff0c\u5176\u4e2d\u7684\u683c\u5b50\u4e3a\u56fa\u5b9a\u5927\u5c0fBlock\uff0cD\u8868\u793a\u5b58\u653e\u7740\u6570\u636e\uff0c\u53ef\u4ee5\u770b\u5230\uff0cFreelist\u53ef\u4ee5\u5c06\u7a7a\u95f2\u7684Block\u4e32\u5728\u4e00\u8d77\uff0c\u4f46\u662f\u4ec5\u5305\u542bReached\u6307\u9488\u4e4b\u524d\u7684\u7a7a\u95f2\u5757\uff0cReached\u6307\u9488\u8868\u793a\u76ee\u524d\u7684\u5185\u5b58\u6700\u591a\u7528\u5230\u7684\u4f4d\u7f6e\uff0c\u5176\u4e4b\u540e\u7684\u5185\u5b58\u5757\u53ef\u80fd\u662f\u65b0\u6269\u5bb9\u51fa\u6765\u6216\u4ece\u4e0a\u6b21\u521b\u5efa\u5c31\u4ece\u6765\u6ca1\u7528\u5230\u7684\uff0c\u5168\u90e8\u662f\u7a7aBlock<\/p>\n<p>\u5f53\u7533\u8bf7\u4e00\u4e2aBlock\u65f6\u91c7\u7528\u5982\u4e0b\u6b65\u9aa4\uff1a<\/p>\n<p>1 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\u5426\u5219\uff0c\u8bf4\u660e\u672c\u5185\u5b58\u533a\u5df2\u88ab\u7528\u6ee1\uff0c\u6b64\u65f6\u5982\u679c\u5141\u8bb8\u6269\u5bb9\uff0c\u5219\u4f7f\u7528\u524d\u8ff0\u6269\u5bb9\u65b9\u6cd5\uff0c\u6269\u5145\u5171\u4eab\u5185\u5b58\u5927\u5c0f\uff0c\u7136\u540e\u6267\u884c\u7b2c2\u6b65\u9aa4\uff0c\u5373\u53ef\u7533\u8bf7\u6210\u529f<\/p>\n<p>4 \u5982\u679c\u65e0\u6cd5\u6269\u5bb9\uff0c\u5219\u8fd4\u56de\u65e0\u6cd5\u7533\u8bf7\u8d44\u6e90\u7684\u9519\u8bef<\/p>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u5f15\u5165Reached\u6307\u9488\u662f\u4e3a\u4e86\u51cf\u5c11\u6269\u5bb9\u7684\u6d88\u8017\uff0c\u5426\u5219\u7684\u8bdd\uff0c\u6bcf\u6b21\u6269\u5bb9\u9700\u8981\u5c06\u65b0\u7684\u4e00\u6279Block\u987a\u5e8f\u52a0\u5165Freelist\uff0c\u4ece\u800c\u662fO(N)\u7684\u65f6\u95f4\uff0c\u5f15\u5165Reached\u6307\u9488\u5219\u53ef\u5c06\u8fd9\u4e2a\u8fc7\u7a0b\u53d8\u6210\u8fd1\u4f3cO(1)\uff08\u5982\u4e0a\u6240\u8ff0\uff0c\u65b0\u6269\u5bb9\u91c7\u7528truncate 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class=\"image-block\"><img decoding=\"async\" class=\"\" src=\"https:\/\/blog-10039692.file.myqcloud.com\/1504769008151_9847_1504769008289.jpg\" \/><\/div>\n<\/figure>\n<p>\u5982\u56fe\uff0c\u5047\u8bbe\u6b64\u65f6\u6211\u4eec\u9700\u8981\u7f29\u5bb9\u8fd9\u5757\u5185\u5b58\uff0c\u5373\u91c7\u7528\u6269\u5bb9\u7684\u53cd\u5411\u52a8\u4f5c\uff1a<\/p>\n<p>1 Reached\u6307\u9488\u524d\u79fb<\/p>\n<p>2 \u901a\u8fc7\u524d\u8ff0\u6269\u7f29\u6b65\u9aa4\uff0c\u7f29\u5c0f\u5185\u5b58\u5230\u76ee\u6807\u5927\u5c0f\uff08\u5373truncate\u8fd9\u4e2a\u6587\u4ef6\uff09<\/p>\n<p>\u4e3b\u8981\u95ee\u9898\u6765\u81ea\u4e8e\u7b2c1\u6b65\uff0c\u7531\u4e8eReached\u6307\u9488\u524d\u9762\u7684Block\u8981\u4e48\u662f\u5b58\u653e\u6570\u636e\uff0c\u8981\u4e48\u662fFreelist\u4e2d\uff0c\u56e0\u6b64\u9700\u8981\u5148\u5c06\u5176\u53d8\u6210\u6ca1\u6709\u4efb\u4f55\u5730\u65b9\u5f15\u7528\u7684Block\uff0c\u5373\u81ea\u7531\u7a7a\u95f2Block\uff0c\u624d\u80fd\u524d\u79fb\uff0c\u5177\u4f53\u7684\u505a\u6cd5\uff1a<\/p>\n<p>1 \u6240\u6709\u7684\u5757\u6709\u4e00\u4e2a\u6807\u8bb0\uff0c\u8868\u793a\u81ea\u5df1\u5f53\u524d\u662f\u4ec0\u4e48\u7c7b\u578b\uff08\u5728Freelist\u4e2d\uff0c\u6216\u8005\u662f\u5728\u67d0\u79cd\u6570\u636e\u7ed3\u6784\u4e2d\uff09<\/p>\n<p>2 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class=\"image-block\"><img decoding=\"async\" class=\"\" src=\"https:\/\/blog-10039692.file.myqcloud.com\/1504769037012_7411_1504769037147.jpg\" \/><\/div>\n<\/figure>\n<p>\u53cc\u5411\u94fe\u8868<\/p>\n<figure>\n<div class=\"image-block\"><img decoding=\"async\" class=\"\" src=\"https:\/\/blog-10039692.file.myqcloud.com\/1504769055820_6116_1504769055977.jpg\" \/><\/div>\n<\/figure>\n<p>\u5982\u56fe\uff0c\u6bcf\u4e2a\u77e9\u5f62\u4e3a\u4e00\u4e2aBlock\uff0c\u82e5\u5e72Block\u6784\u6210\u4e00\u4e2a\u53cc\u5411\u94fe\u8868\uff0cBlock\u5185\u90e8\u6709\u4e00\u4e2a\u72ec\u7acb\u7684Head\uff0c\u7528\u4e8e\u5b58\u653e\u7c7b\u578b\u3001\u524d\u540e\u6307\u9488\u4ee5\u53ca\u5176\u4ed6\u4e00\u4e9b\u5143\u4fe1\u606f\uff0c\u5176\u4e2d\u6bcf\u4e2aBlock\u5b58\u653e\u4e00\u4e2a\u6216\u591a\u4e2a\u6570\u636e\uff0c\u4e14\u6570\u636e\u5728Block\u5185\u90e8\u6309\u5e8f\u7d27\u51d1\u6392\u5217\uff0c\u4f8b\u5982\u4e0a\u9762\u7684\u7ed3\u6784\u5c31\u76f8\u5f53\u4e8e\u5728\u666e\u901a\u7684\u79c1\u6709\u5185\u5b58\u4e2d\uff0c\u7528\u4e00\u4e2a\u67099\u4e2a\u8282\u70b9\u7684\u53cc\u5411\u94fe\u8868\u7ba1\u7406Elem1\u5230Elem9\u4e00\u6837\uff0c\u4e8c\u8005\u7b49\u4ef7<\/p>\n<p>\u5982\u679c\u4e00\u4e2a\u6570\u636e\u6bd4\u8f83\u5927\uff0c\u5c31\u7b97\u5355\u72ec\u5360\u7528\u4e00\u4e2aBlock\u8282\u70b9\u4e5f\u65e0\u6cd5\u5b58\u653e\uff0c\u5219\u9700\u8981\u5c06\u5176\u62c6\u4e3a\u82e5\u5e72\u4efd\uff0c\u6bd4\u5982\u4e00\u4e2a\u8d85\u957f\u7684\u5b57\u7b26\u4e32\uff0c\u5982\u56fe\uff08\u5047\u8bbe\u8fd9\u4e2a\u5b57\u7b26\u4e32\u662f\u76f4\u63a5\u96b6\u5c5e\u4e8edb\uff09\uff1a<\/p>\n<figure>\n<div class=\"image-block\"><img decoding=\"async\" class=\"\" src=\"https:\/\/blog-10039692.file.myqcloud.com\/1504769071539_4817_1504769071674.jpg\" \/><\/div>\n<\/figure>\n<p>\u5982\u679c\u4e00\u4e2a\u94fe\u8868\u4e2d\u7684\u6570\u636e\u5b58\u5728\u8d85\u957f\u5b57\u7b26\u4e32\uff0c\u5219\u94fe\u8868\u672c\u8eab\u53ef\u4ee5\u53ea\u8bb0\u5f55\u5176\u6307\u9488\uff0c\u5c06\u5b57\u7b26\u4e32\u53e6\u5916\u5b58\u653e\u5728Block\u94fe\u8868\u4e2d\uff0c\u5982\u56fe\uff08\u5047\u8bbe\u8fd9\u4e2aList\u662f\u76f4\u63a5\u96b6\u5c5e\u4e8edb\uff09\uff0cElem2\u7531\u4e8e\u8fc7\u5927\uff0c\u662f\u5355\u72ec\u7528Block\u94fe\u8868\u5b58\u50a8\uff0c\u7136\u540eList\u5bf9\u8c61\u4e2d\u5b58\u50a8\u5176\u6307\u9488\uff0c\u5373\u5e26\u65b9\u6846\u7684Elem2\uff1a<\/p>\n<p>\u8fd9\u91cc\uff0c\u6240\u6709\u7684\u5b9e\u73b0\u90fd\u662f\u53cc\u5411\u94fe\u8868\uff0c\u4e0d\u80fd\u5b9e\u73b0\u4e3a\u5355\u5411\uff0c\u56e0\u4e3a\u5982\u4e0a\u9762\u7f29\u5bb9\u7b97\u6cd5\u6240\u8ff0\uff0c\u9700\u8981\u4ece\u4efb\u610f\u8282\u70b9\u5f97\u5230\u5176\u524d\u9a71\u540e\u7ee7\uff0c\u7528\u6765\u505aBlock\u7684\u8fc1\u79fb<\/p>\n<h3>\u94fe\u8868\u64cd\u4f5c<\/h3>\n<p>1\uff09\u67e5\u8be2\u6570\u636e<\/p>\n<p>\u8fd9\u91cc\u53ea\u8ba8\u8bba\u4e00\u822c\u7684\u67e5\u8be2\u7b2cK\u4e2a\u6570\u636e\uff0c\u4ece\u94fe\u8868\u7b2c\u4e00\u4e2aBlock\u5f00\u59cb\u904d\u5386\uff0cHead\u4e2d\u5b58\u653e\u4e86\u672cBlock\u7684\u6570\u636e\u6570\u91cf\uff0c\u56e0\u6b64\u904d\u5386\u65f6\u53ef\u4ee5\u5feb\u901f\u8df3\u6570\u91cf\uff08\u5982\u679cHead\u4e2d\u6ca1\u6709\u5b58\u653e\uff0c\u5219\u9700\u8981\u5206\u6790\u672cBlock\u6570\u636e\uff09\uff0c\u5f53\u627e\u5230\u7b2cK\u4e2a\u6570\u636e\u6240\u5728\u7684Block\u540e\uff0c\u7528K\u51cf\u53bb\u5df2\u8df3\u8fc7\u7684\u6570\u91cf\uff0c\u5219\u4e3a\u672cBlock\u4e2d\u7684\u76f8\u5bf9\u4f4d\u7f6e\uff0c\u5206\u6790\u672cBlock\u7684\u7d27\u51d1\u6570\u636e\uff0c\u53d6\u51faElem\u5373\u53ef\uff1b\u9488\u5bf9\u957f\u5b57\u7b26\u4e32\u7684\u67e5\u627e\u7b2cK\u5b57\u8282\u4e5f\u662f\u7c7b\u4f3c\u505a\u6cd5\uff1b\u7531\u4e8e\u662f\u53cc\u5411\u94fe\u8868\uff0c\u5012\u6570\u7b2cK\u4e2a\u6570\u636e\u4e5f\u53ef\u4ece\u5c3e\u8282\u70b9\u5f00\u59cb\u5f80\u524d\u7528\u540c\u6837\u7684\u7b97\u6cd5\u8fdb\u884c<\/p>\n<p>\u67e5\u627e\u662f\u5426\u5b58\u5728\u503c\u4e3a\u6307\u5b9a\u503c\u7684\u6570\u636e\uff0c\u5219\u9700\u8981\u987a\u5e8f\u904d\u5386\u6240\u6709Block\u7684\u6240\u6709\u6570\u636e\u8fdb\u884c\u6bd4\u8f83\uff0c\u4e5f\u662f\u901a\u8fc7\u904d\u5386\u8fdb\u884c\uff0c\u4e0d\u518d\u8d58\u8ff0<\/p>\n<p>2\uff09\u63d2\u5165\u6570\u636e<\/p>\n<p>\u901a\u8fc71\uff09\u4e2d\u7684\u67e5\u8be2\u7b97\u6cd5\u627e\u5230\u8981\u63d2\u5165\u7684\u4f4d\u7f6e\uff0c\u63d2\u5165\u6570\u636e\u5e76\u91cd\u65b0\u7ec4\u7ec7Block\u6570\u636e\uff0c\u82e5Block\u56e0\u4e3a\u8fd9\u6b21\u63d2\u5165\u800c\u65e0\u6cd5\u5b58\u4e0b\u65b0\u7ec4\u7ec7\u7684\u6570\u636e\uff0c\u5219\u9700\u8981\u4e00\u6b21\u5206\u88c2\u8fc7\u7a0b\uff1a<\/p>\n<figure>\n<div class=\"image-block\"><img decoding=\"async\" class=\"\" src=\"https:\/\/blog-10039692.file.myqcloud.com\/1504769096204_850_1504769096340.jpg\" 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class=\"image-block\"><img decoding=\"async\" class=\"\" src=\"https:\/\/blog-10039692.file.myqcloud.com\/1504769123374_3159_1504769123501.jpg\" \/><\/div>\n<\/figure>\n<p>\u5982\u56fe\uff0c\u4eceList\u4e2d\u5220\u9664Elem6\u540e\uff0c\u68c0\u6d4b\u5230\u5de6\u8fb9\u8282\u70b9\u7531\u4e8e\u6570\u636e\u91cf\u53d8\u5c0f\uff0c\u53ef\u4ee5\u548c\u5176\u540e\u7ee7\uff08\u53f3\u8fb9\u8282\u70b9\uff09\u5408\u5e76\uff0c\u4e8e\u662f\u5c06\u53f3\u8fb9\u8282\u70b9\u7684\u6570\u636e\uff08Elem7\u548c8\uff09\u8fc1\u79fb\u8fc7\u6765\uff0c\u5e76\u5c06\u53f3\u8fb9\u8282\u70b9\u4eceList\u4e2d\u5220\u9664\uff0c\u91ca\u653e\u7a7a\u95f4<\/p>\n<p>\u5408\u5e76\u8fc7\u7a0b\u7684\u4e00\u4e9b\u5173\u952e\u95ee\u9898\uff1a<\/p>\n<p>1\uff09\u6570\u636e\u5408\u5e76\u65f6\u673a\uff0c\u53ef\u4ee5\u91c7\u7528\u6bcf\u6b21\u5220\u9664\u65f6\u5019\u90fd\u89e6\u53d1\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u540e\u53f0\u4efb\u52a1\u6e10\u8fdb\u5f0f\u904d\u5386\u68c0\u67e5\u6765\u8fdb\u884c\uff0c\u524d\u8005\u5b9e\u65f6\u6027\u597d\u4e9b<\/p>\n<p>2\uff09\u5408\u5e76\u64cd\u4f5c\u89e6\u53d1\u7684Block\u6570\u636e\u5927\u5c0f\u9608\u503c\uff0c\u5982\u679c\u4e24\u4e2aBlock\u53ef\u4ee5\u5408\u5e76\uff0c\u4f46\u662f\u5408\u5e76\u540e\u6bd4\u8f83\u6ee1\uff0c\u5219\u5f88\u53ef\u80fd\u5728\u4e0b\u6b21\u63d2\u5165\u6570\u636e\u65f6\u53c8\u91cd\u65b0\u5206\u88c2\uff0c\u6240\u4ee5\u53ef\u4ee5\u5b9a\u4e00\u4e2a\u9608\u503c\uff0c\u5f53\u5408\u5e76\u540e\u6570\u636e\u5360Block\u5927\u5c0f\u4ecd\u7136\u5c0f\u4e8e\u4e00\u5b9a\u6bd4\u7387\uff0c\u624d\u8ba4\u4e3a\u5408\u5e76\u64cd\u4f5c\u662f\u6709\u4ef7\u503c\u7684<\/p>\n<p>3\uff09\u524d\u5411\u548c\u540e\u5411\u5408\u5e76\uff0c\u4e24\u4e2aBlock\u5b58\u5728\u524d\u9a71\u548c\u540e\u7ee7\u7684\u5173\u7cfb\uff0c\u4ece\u54ea\u4e2aBlock\u5411\u53e6\u4e00\u4e2a\u5408\u5e76\uff0c\u4e5f\u662f\u9700\u8981\u8003\u8651\u7684\u95ee\u9898\uff0c\u4f46\u5728\u94fe\u8868\u7ed3\u6784\u4e2d\u8fd9\u4e2a\u95ee\u9898\u4e0d\u4e25\u91cd<\/p>\n<p>P.S.\u5982\u679c\u4e0d\u662f\u5220\u9664Elem\uff0c\u800c\u662f\u4fee\u6539Block\u4e2d\u67d0\u4e2aElem\u6570\u636e\uff0c\u4f7f\u5f97\u5176\u6570\u636e\u957f\u5ea6\u53d8\u77ed\uff0c\u8fdb\u800c\u6574\u4e2aBlock\u7684\u6570\u636e\u6253\u5305\u540e\u53d8\u77ed\uff0c\u53ef\u4ee5\u548c\u524d\u9a71\u6216\u540e\u7ee7\u5408\u5e76\u7684\u65f6\u5019\uff0c\u4e5f\u9002\u7528\u5408\u5e76\u64cd\u4f5c\uff0c\u5f53\u7136\uff0c\u5982\u679cElem\u6570\u636e\u88ab\u4fee\u6539\u540e\u53d8\u957f\uff0c\u4e5f\u53ef\u80fd\u9700\u8981\u5206\u88c2\u64cd\u4f5c<\/p>\n<h3>Block\u6570\u636e\u5206\u644a\u8fc1\u79fb<\/h3>\n<p>\u4e0a\u9762\u63d0\u5230\uff0c\u94fe\u8868\u64cd\u4f5c\u5728\u63d2\u5165\u7684\u65f6\u5019\uff0c\u5982\u679c\u7531\u4e8e\u63d2\u5165\u5bfc\u81f4\u88ab\u5904\u7406\u7684Block\u7684\u65b0\u7684\u6570\u636e\u5927\u5c0f\u8d85\u51faBlock\u9650\u5236\uff0c\u5219\u9700\u8981\u5206\u88c2\u8282\u70b9\uff0c\u4f46\u662f\u5728\u6709\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4e0d\u7528\u5206\u88c2\u8282\u70b9\uff0c\u800c\u662f\u901a\u8fc7\u5c06\u6570\u636e\u5411\u8fd9\u4e2aBlock\u7684\u524d\u9a71\u6216\u540e\u7ee7\u79fb\u52a8\u6765\u5b9e\u73b0<\/p>\n<figure>\n<div class=\"image-block\"><img decoding=\"async\" class=\"\" src=\"https:\/\/blog-10039692.file.myqcloud.com\/1504769152992_3263_1504769153135.jpg\" \/><\/div>\n<\/figure>\n<p>\u5982\u56fe\uff0c\u548c\u4e0a\u9762\u63d2\u5165\u7684\u4f8b\u5b50\u7c7b\u4f3c\uff0c\u7531\u4e8e\u63d2\u5165\u4e86Elem6\uff0c\u5bfc\u81f4\u5de6\u8fb9Block\u7684\u6570\u636e\u8d85\u51fa\u7a7a\u95f4\u5927\u5c0f\uff0c\u4e0e\u4e0a\u9762\u63cf\u8ff0\u7684\u7533\u8bf7\u65b0\u8282\u70b9\u5206\u88c2Elem7\u548c8\u7684\u65b9\u6cd5\u4e0d\u540c\uff0c\u8fd9\u91cc\u662f\u5c06\u8fd9\u4e24\u4e2a\u6570\u636e\u8fc1\u79fb\u81f3\u540e\u7ee7\u8282\u70b9\uff08\u5047\u8bbe\u540e\u7ee7\u8282\u70b9\u7a7a\u95f4\u8db3\u591f\uff09\uff0c\u4ece\u800c\u5f62\u6210\u4e86\u4e0b\u9762\u7684\u6570\u636e\u5e03\u5c40\uff0c\u4e0d\u7528\u7533\u8bf7\u65b0\u7684Block<\/p>\n<p>\u5206\u644a\u8fc1\u79fb\u7684\u65f6\u673a\u53ef\u5728\u6bcf\u6b21\u9700\u8981\u5206\u88c2\u65f6\u8fdb\u884c\u5224\u65ad\uff0c\u5c3d\u53ef\u80fd\u51cf\u5c11Block\u7684\u5206\u88c2\uff0c\u4ece\u800c\u63d0\u9ad8\u5185\u5b58\u4f7f\u7528\u7387\uff1b\u540c\u4e0a\u8ff0\u5408\u5e76\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u5411\u524d\u9a71\u6216\u540e\u7ee7\u8fc1\u79fb\uff0c\u5177\u4f53\u5982\u4f55\u505a\u5219\u770b\u5177\u4f53\u9700\u6c42\u548c\u7b97\u6cd5\u4e86<\/p>\n<p>\u5982\u679c\u662f\u4fee\u6539Block\u4e2d\u7684\u6570\u636e\uff0c\u6570\u636e\u957f\u5ea6\u53d8\u957f\u7684\u60c5\u51b5\uff0c\u4e5f\u9002\u7528\u672c\u64cd\u4f5c<\/p>\n<h3>\u5e73\u8861\u6811<\/h3>\n<p>\u548c\u53cc\u5411\u94fe\u8868\u7c7b\u4f3c\uff0c\u7528Block\u505a\u8282\u70b9\uff0c\u6bcf\u4e2a\u8282\u70b9\u5185\u90e8\u6709\u591a\u4e2a\u6570\u636e\uff08\u65b9\u4fbf\u8d77\u89c1\u8fd9\u91cc\u53ea\u63cf\u8ff0Key\uff0cValue\u5219\u53ef\u4ee5\u770b\u505aKey\u7684\u4e00\u4e2a\u9644\u5c5e\u6570\u636e\uff09\uff1a<\/p>\n<figure>\n<div class=\"image-block\"><img decoding=\"async\" class=\"\" src=\"https:\/\/blog-10039692.file.myqcloud.com\/1504769170801_7711_1504769170939.jpg\" \/><\/div>\n<\/figure>\n<p>\u5982\u56fe\uff0c\u6bcf\u4e2aKey\u540e\u9762\u7684\u5b57\u6bcd\u53ef\u770b\u505a\u662fKey\u7684\u503c\uff0c\u53ef\u4ee5\u770b\u5230\u6574\u4e2a\u5e73\u8861\u6811\u4e2d\u6570\u636e\u662f\u6709\u5e8f\u6392\u5217\uff0c\u53ea\u662f\u6bcf\u4e2a\u8282\u70b9\u53ef\u80fd\u5b58\u653e\uff08\u8fde\u7eed\u7684\uff09\u591a\u4e2aKey<\/p>\n<p>\u540c\u65f6\uff0c\u5e73\u8861\u6811\u4e2d\u6bcf\u4e2a\u8282\u70b9\u8fd8\u6709\u4e00\u4e2aSize\u5c5e\u6027\uff0c\u7528\u6765\u8bb0\u5f55\u8fd9\u4e2a\u8282\u70b9\u4e3a\u6839\u7684\u5b50\u6811\u4e2d\u7684Key\u7684\u6570\u91cf\uff0c\u901a\u8fc7\u8fd9\u4e2a\u5c5e\u6027\u53ef\u4ee5\u5bf9\u6811\u4e2d\u7684\u6570\u636e\u6c42\u5176\u6392\u884c\uff0c\u6216\u8005\u6c42\u7b2cK\u4e2a\u6570\u636e\uff0c\u4e5f\u80fd\u65b9\u4fbf\u5b9e\u73b0Redis\u7684randomkey\u4e4b\u7c7b\u7684\u64cd\u4f5c<\/p>\n<p>\u5e73\u8861\u6811\u4e2d\u5355\u4e2a\u8282\u70b9\u7684\u6570\u636e\u5b58\u653e\uff0c\u4ee5\u53ca\u5b58\u653e\u8d85\u957f\u5b57\u7b26\u4e32\u7684\u65b9\u6848\u540c\u53cc\u5411\u94fe\u8868\uff0c\u4e0d\u518d\u8d58\u8ff0<\/p>\n<h3>\u5e73\u8861\u6811\u7c7b\u522b\u7684\u9009\u62e9<\/h3>\n<p>\u7531\u4e8e\u6b64\u5904\u4f7f\u7528\u7684\u5e73\u8861\u6811\u662f\u4ee5Block\u4e3a\u8282\u70b9\uff0c\u56e0\u6b64\u548c\u666e\u901a\u7684\u4e8c\u53c9\u5e73\u8861\u6811\u6ca1\u6709\u4ec0\u4e48\u533a\u522b\uff0c\u53ef\u4ee5\u4efb\u610f\u9009\u7528\uff0c\u6bd4\u5982AVL\uff0c\u7ea2\u9ed1\u6811\uff0cTreap\u7b49\u90fd\u53ef\u4ee5\uff0c\u5177\u4f53\u7684\u9009\u62e9\u53ef\u80fd\u5728\u6548\u7387\u3001\u5b9e\u73b0\u96be\u5ea6\u4ee5\u53ca\u4e00\u4e9b\u64cd\u4f5c\u7ec6\u8282\u4e0a\u6709\u5dee\u522b\uff0c\u9700\u8981\u770b\u60c5\u51b5\u800c\u5b9a<\/p>\n<p>\u4e3a\u4e86\u80fd\u652f\u6301\u524d\u9762\u4e00\u8282\u8bbe\u8ba1\u7684\u5185\u5b58\u7f29\u5bb9\u6574\u7406\u7b97\u6cd5\uff0c\u5fc5\u987b\u80fd\u4ece\u6811\u4e2d\u4efb\u610f\u4e00\u4e2a\u8282\u70b9\u5f97\u5230\u548c\u5176\u76f8\u5173\u7684\u8282\u70b9\uff0c\u56e0\u6b64\u8282\u70b9\u5fc5\u987b\u6709\u4e00\u4e2a\u7236\u6307\u9488\u6307\u5411\u7236\u8282\u70b9\uff0c\u8fd9\u6837\u4e5f\u53ef\u4ee5\u907f\u514d\u76f8\u5173\u64cd\u4f5c\u5728\u7f16\u7a0b\u4e0a\u7684\u9012\u5f52\u65b9\u5f0f<\/p>\n<h3>\u5e73\u8861\u6811\u7684\u64cd\u4f5c<\/h3>\n<p>1\uff09\u6839\u636eKey\u67e5\u627e\u6570\u636e<\/p>\n<p>\u7c7b\u4f3c\u666e\u901a\u5e73\u8861\u6811\u7684\u67e5\u627e\u65b9\u5f0f\uff0c\u4f46\u662f\u7531\u4e8e\u6bcf\u4e2a\u8282\u70b9\u53ef\u80fd\u6709\u591a\u4e2a\u6570\u636e\uff0c\u800c\u4e14\u6211\u4eec\u5e0c\u671b\u5728\u67e5\u627e\u5931\u8d25\u65f6\u5e76\u4e0d\u4ec5\u4ec5\u544a\u77e5\u5931\u8d25\uff0c\u80fd\u540c\u65f6\u544a\u77e5\u8fd9\u4e2aKey\u9700\u8981\u88ab\u63d2\u5165\u7684\u4f4d\u7f6e\uff0c\u4ee5\u4fbf\u4e8e\u63a5\u4e0b\u6765\u7684\u64cd\u4f5c<\/p>\n<p>\u56e0\u6b64\u5728\u505a\u67d0\u4e2a\u8282\u70b9\u6570\u636e\u548c\u5f85\u67e5\u8be2\u6570\u636e\u6bd4\u5bf9\u65f6\uff0c\u91c7\u7528\u9650\u5b9a\u8303\u56f4\u7684\u65b9\u5f0f\uff0c\u8303\u56f4\u91c7\u7528[a,b)\u7684\u5de6\u95ed\u53f3\u5f00\u7a7a\u95f4\u6765\u8868\u793a\uff0c\u5176\u4e2da\u548cb\u90fd\u662fBlock\uff0c\u8868\u793aKey\u53ef\u80fd\u5728\u8fd9\u4e24\u4e2aBlock\u6240\u8868\u793a\u7684\u533a\u95f4\u4e2d\uff0c\u663e\u7136a\u5e94\u8be5\u662fb\u7684\u524d\u9a71\uff08\u76f4\u63a5\u6216\u95f4\u63a5\uff09<\/p>\n<p>\u4e00\u5f00\u59cb\u67e5\u627e\u65f6\uff0c\u5c06\u533a\u95f4\u8bbe\u7f6e\u4e3a[begin,end)\uff0cbegin\u548cend\u662f\u4e24\u4e2a\u7279\u6b8a\u503c\uff0c\u7c7b\u4f3c\u6570\u5b66\u4e2d\u7684\u6b63\u8d1f\u65e0\u7a77\uff0c\u8868\u793a\u5230\u6811\u7684\u5f00\u5934Block\u548c\u865a\u62df\u7684\u7ed3\u675fBlock\uff08\u5373\u6700\u540e\u4e00\u4e2aBlock\u4e4b\u540e\u7684\u4e00\u4e2a\u5047\u60f3\u7684\u8282\u70b9\uff09\uff0c\u4ece\u6811\u6839\u5f00\u59cb\u67e5\u627e\uff1a<\/p>\n<p>a\uff09\u82e5Key\u5c0f\u4e8e\u5f53\u524d\u8282\u70b9\u7684\u7b2c\u4e00\u4e2a\u6570\u636e\uff0c\u5219\u533a\u95f4\u4e2d\u7684b\u66f4\u65b0\u4e3a\u672c\u8282\u70b9\uff0c\u4e4b\u540e\u5728\u5de6\u5b50\u6811\u9012\u5f52\u67e5\u627e<\/p>\n<p>b\uff09\u82e5Key\u5927\u4e8e\u5f53\u524d\u8282\u70b9\u7684\u7b2c\u4e00\u4e2a\u6570\u636e\uff0c\u5219\u533a\u95f4\u4e2d\u7684a\u66f4\u65b0\u4e3a\u672c\u8282\u70b9\uff0c\u4e4b\u540e\u5728\u53f3\u5b50\u6811\u9012\u5f52\u67e5\u627e<\/p>\n<p>c\uff09\u82e5Key\u7b49\u4e8e\u5f53\u524d\u8282\u70b9\u7684\u7b2c\u4e00\u4e2a\u6570\u636e\uff0c\u5219\u7acb\u5373\u8fd4\u56de\u67e5\u627e\u6210\u529f\uff0c\u4ee5\u53ca\u672c\u8282\u70b9<\/p>\n<p>d\uff09\u6b65\u9aa4a\u548cb\u4e2d\uff0c\u82e5\u88ab\u9012\u5f52\u7684\u5b50\u6811\u4e3a\u7a7a\uff0c\u5219\u5224\u65ad\u5f53\u524d\u533a\u95f4\uff0c\u5728\u533a\u95f4\u5185\u90e8\u7684Block\u7684\u6240\u6709\u6570\u636e\u4e2d\u4f9d\u6b21\u627eKey\uff08\u6b64\u65f6\u533a\u95f4\u4e2d\u7684Block\u6570\u91cf\u6700\u591a\u4e3a1\uff09\uff0c\u82e5\u627e\u5230\u5219\u6309c\u6b65\u9aa4\u8fdb\u884c\u8fd4\u56de\uff0c\u5426\u5219\u8fd4\u56de\u67e5\u627e\u5931\u8d25\uff0c\u4ee5\u53ca\u53ef\u4ee5Key\u53ef\u4ee5\u63d2\u5165\u7684Block\u8282\u70b9<\/p>\n<p>\u4e3e\u4f8b\u8bf4\u660e\uff1a<\/p>\n<fi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class=\"image-block\"><img decoding=\"async\" class=\"\" src=\"https:\/\/blog-10039692.file.myqcloud.com\/1504769497787_8406_1504769498164.jpg\" \/><\/div>\n<\/figure>\n<p>\u5982\u56fe\uff0c\u5047\u8bbe\u6211\u4eec\u8981\u5728\u8fd9\u4e2a\u5e73\u8861\u6811\u4e2d\u67e5\u627eKey H\uff0c\u6b65\u9aa4\uff1a<\/p>\n<p>A\uff09\u521d\u59cb\u5316\u533a\u95f4\u4e3a[begin,end)<\/p>\n<p>B\uff09\u548c\u6839\u8282\u70b9NodeD\u7684\u7b2c\u4e00\u4e2a\u6570\u636eKey M\u6bd4\u8f83\uff0c\u7531\u4e8e<code>H&lt;M\uff0c\u66f4\u65b0\u533a\u95f4\u4e3a[begin, NodeD)<\/code><\/p>\n<p>C\uff09\u5728NodeD\u7684\u5de6\u5b50\u6811\u67e5\u627e\uff0c\u548c\u5de6\u5b50\u6811\u7684\u6839\u8282\u70b9NodeB\u7684\u7b2c\u4e00\u4e2a\u6570\u636eKey G\u6bd4\u8f83\uff0c\u7531\u4e8eH&gt;G\uff0c\u66f4\u65b0\u533a\u95f4\u4e3a[NodeB, NodeD)<\/p>\n<p>D\uff09\u5728NodeB\u7684\u53f3\u5b50\u6811\u67e5\u627e\uff0c\u548c\u53f3\u5b50\u6811\u6839\u8282\u70b9NodeC\u7b2c\u4e00\u4e2a\u6570\u636eKey J\u6bd4\u8f83\uff0c\u7531\u4e8e<code>H&lt;J\uff0c\u66f4\u65b0\u533a\u95f4\u4e3a[NodeB,NodeC)<\/code><\/p>\n<p>E\uff09\u5728NodeC\u7684\u5de6\u5b50\u6811\u67e5\u627e\uff0c\u7531\u4e8e\u5de6\u5b50\u6811\u4e3a\u7a7a\uff0c\u5219\u533a\u95f4\u7ed3\u679c\u5c31\u662f[NodeB,NodeC)\uff0c\u8fd9\u4e2a\u533a\u95f4\u4ec5\u5305\u542bNodeB\u4e00\u4e2a\u8282\u70b9\uff0c\u5728\u8fd9\u4e2aBlock\u4e2d\u987a\u5e8f\u67e5\u627eKey H\uff0c\u627e\u5230\u540e\u8fd4\u56de\uff1b\u82e5Key H\u5e76\u4e0d\u5b58\u5728\u4e8e\u4e0a\u9762\u8fd9\u68f5\u6811\uff0c\u5219E\u6b65\u9aa4\u8fd4\u56deNodeB\uff0c\u8868\u793aKey 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class=\"image-block\"><img decoding=\"async\" class=\"\" src=\"https:\/\/blog-10039692.file.myqcloud.com\/1504769694452_8446_1504769694692.jpg\" 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