{"id":10007984,"date":"2023-06-25T15:00:03","date_gmt":"2023-06-25T07:00:03","guid":{"rendered":"https:\/\/ityet.com\/?p=10007984"},"modified":"2023-06-25T15:00:03","modified_gmt":"2023-06-25T07:00:03","slug":"%e4%b8%80%e7%af%87%e6%96%87%e7%ab%a0%e5%91%8a%e8%af%89%e4%bd%a0%e4%bb%80%e4%b9%88%e6%98%afbloomfilter","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10007984","title":{"rendered":"\u4e00\u7bc7\u6587\u7ae0\u544a\u8bc9\u4f60\u4ec0\u4e48\u662fBloomFilter"},"content":{"rendered":"<h2>\u4ec0\u4e48\u662f BloomFilter<\/h2>\n<p><strong>\u5e03\u9686\u8fc7\u6ee4\u5668<\/strong>\uff08\u82f1\u8bed\uff1aBloom Filter\uff09\u662f 1970 \u5e74\u7531\u5e03\u9686\u63d0\u51fa\u7684\u3002\u5b83\u5b9e\u9645\u4e0a\u662f\u4e00\u4e2a\u5f88\u957f\u7684\u4e8c\u8fdb\u5236\u5411\u91cf\u548c\u4e00\u7cfb\u5217\u968f\u673a\u6620\u5c04\u51fd\u6570\u3002\u4e3b\u8981\u7528\u4e8e\u5224\u65ad\u4e00\u4e2a\u5143\u7d20\u662f\u5426\u5728\u4e00\u4e2a\u96c6\u5408\u4e2d\u3002<\/p>\n<p>\u901a\u5e38\u6211\u4eec\u4f1a\u9047\u5230\u5f88\u591a\u8981\u5224\u65ad\u4e00\u4e2a\u5143\u7d20\u662f\u5426\u5728\u67d0\u4e2a\u96c6\u5408\u4e2d\u7684\u4e1a\u52a1\u573a\u666f\uff0c\u4e00\u822c\u60f3\u5230\u7684\u662f\u5c06\u96c6\u5408\u4e2d\u6240\u6709\u5143\u7d20\u4fdd\u5b58\u8d77\u6765\uff0c\u7136\u540e\u901a\u8fc7\u6bd4\u8f83\u786e\u5b9a\u3002\u94fe\u8868\u3001\u6811\u3001\u6563\u5217\u8868\uff08\u53c8\u53eb\u54c8\u5e0c\u8868\uff0cHash table\uff09\u7b49\u7b49\u6570\u636e\u7ed3\u6784\u90fd\u662f\u8fd9\u79cd\u601d\u8def\u3002\u4f46\u662f\u968f\u7740\u96c6\u5408\u4e2d\u5143\u7d20\u7684\u589e\u52a0\uff0c\u6211\u4eec\u9700\u8981\u7684\u5b58\u50a8\u7a7a\u95f4\u4e5f\u4f1a\u5448\u73b0\u7ebf\u6027\u589e\u957f\uff0c\u6700\u7ec8\u8fbe\u5230\u74f6\u9888\u3002\u540c\u65f6\u68c0\u7d22\u901f\u5ea6\u4e5f\u8d8a\u6765\u8d8a\u6162\uff0c\u4e0a\u8ff0\u4e09\u79cd\u7ed3\u6784\u7684\u68c0\u7d22\u65f6\u95f4\u590d\u6742\u5ea6\u5206\u522b\u4e3a$O(n)$\uff0c$O(logn)$\uff0c$O(1)$\u3002<\/p>\n<p>\u8fd9\u4e2a\u65f6\u5019\uff0c\u5e03\u9686\u8fc7\u6ee4\u5668\uff08Bloom Filter\uff09\u5c31\u5e94\u8fd0\u800c\u751f\u3002<\/p>\n<h2>\u5e03\u9686\u8fc7\u6ee4\u5668\u539f\u7406<\/h2>\n<p>\u4e86\u89e3\u5e03\u9686\u8fc7\u6ee4\u5668\u539f\u7406\u4e4b\u524d\uff0c\u5148\u56de\u987e\u4e0b Hash \u51fd\u6570\u539f\u7406\u3002<\/p>\n<h3>\u54c8\u5e0c\u51fd\u6570<\/h3>\n<p>\u54c8\u5e0c\u51fd\u6570\u7684\u6982\u5ff5\u662f\uff1a\u5c06\u4efb\u610f\u5927\u5c0f\u7684\u8f93\u5165\u6570\u636e\u8f6c\u6362\u6210\u7279\u5b9a\u5927\u5c0f\u7684\u8f93\u51fa\u6570\u636e\u7684\u51fd\u6570\uff0c\u8f6c\u6362\u540e\u7684\u6570\u636e\u79f0\u4e3a\u54c8\u5e0c\u503c\u6216\u54c8\u5e0c\u7f16\u7801\uff0c\u4e5f\u53eb\u6563\u5217\u503c\u3002\u4e0b\u9762\u662f\u4e00\u5e45\u793a\u610f\u56fe\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000024566950\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u6240\u6709\u6563\u5217\u51fd\u6570\u90fd\u6709\u5982\u4e0b\u57fa\u672c\u7279\u6027\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u4e24\u4e2a\u6563\u5217\u503c\u662f\u4e0d\u76f8\u540c\u7684\uff08\u6839\u636e\u540c\u4e00\u51fd\u6570\uff09\uff0c\u90a3\u4e48\u8fd9\u4e24\u4e2a\u6563\u5217\u503c\u7684\u539f\u59cb\u8f93\u5165\u4e5f\u662f\u4e0d\u76f8\u540c\u7684\u3002\u8fd9\u4e2a\u7279\u6027\u662f\u6563\u5217\u51fd\u6570\u5177\u6709\u786e\u5b9a\u6027\u7684\u7ed3\u679c\uff0c\u5177\u6709\u8fd9\u79cd\u6027\u8d28\u7684\u6563\u5217\u51fd\u6570\u79f0\u4e3a<strong>\u5355\u5411\u6563\u5217\u51fd\u6570<\/strong>\u3002<\/li>\n<li>\u6563\u5217\u51fd\u6570\u7684\u8f93\u5165\u548c\u8f93\u51fa\u4e0d\u662f\u552f\u4e00\u5bf9\u5e94\u5173\u7cfb\u7684\uff0c\u5982\u679c\u4e24\u4e2a\u6563\u5217\u503c\u76f8\u540c\uff0c\u4e24\u4e2a\u8f93\u5165\u503c\u5f88\u53ef\u80fd\u662f\u76f8\u540c\u7684\uff0c\u4f46\u4e5f\u53ef\u80fd\u4e0d\u540c\uff0c\u8fd9\u79cd\u60c5\u51b5\u79f0\u4e3a\u201c<strong>\u6563\u5217\u78b0\u649e<\/strong>\uff08collision\uff09\u201d\u3002<\/li>\n<\/ul>\n<p>\u4f46\u662f\u7528 hash\u8868\u5b58\u50a8\u5927\u6570\u636e\u91cf\u65f6\uff0c\u7a7a\u95f4\u6548\u7387\u8fd8\u662f\u5f88\u4f4e\uff0c\u5f53\u53ea\u6709\u4e00\u4e2a hash \u51fd\u6570\u65f6\uff0c\u8fd8\u5f88\u5bb9\u6613\u53d1\u751f\u54c8\u5e0c\u78b0\u649e\u3002<\/p>\n<h3>\u5e03\u9686\u8fc7\u6ee4\u5668\u6570\u636e\u7ed3\u6784<\/h3>\n<p>BloomFilter \u662f\u7531\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u7684\u4e8c\u8fdb\u5236\u5411\u91cf\u6216\u8005\u4f4d\u56fe\uff08bitmap\uff09\u548c\u4e00\u7cfb\u5217\u6620\u5c04\u51fd\u6570\u7ec4\u6210\u7684\u3002<\/p>\n<p>\u5728\u521d\u59cb\u72b6\u6001\u65f6\uff0c\u5bf9\u4e8e\u957f\u5ea6\u4e3a m \u7684\u4f4d\u6570\u7ec4\uff0c\u5b83\u7684\u6240\u6709\u4f4d\u90fd\u88ab\u7f6e\u4e3a0\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000024566951\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u5f53\u6709\u53d8\u91cf\u88ab\u52a0\u5165\u96c6\u5408\u65f6\uff0c\u901a\u8fc7 K \u4e2a\u6620\u5c04\u51fd\u6570\u5c06\u8fd9\u4e2a\u53d8\u91cf\u6620\u5c04\u6210\u4f4d\u56fe\u4e2d\u7684 K \u4e2a\u70b9\uff0c\u628a\u5b83\u4eec\u7f6e\u4e3a 1\uff08\u5047\u5b9a\u6709\u4e24\u4e2a\u53d8\u91cf\u90fd\u901a\u8fc7 3 \u4e2a\u6620\u5c04\u51fd\u6570\uff09\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000024566952\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u67e5\u8be2\u67d0\u4e2a\u53d8\u91cf\u7684\u65f6\u5019\u6211\u4eec\u53ea\u8981\u770b\u770b\u8fd9\u4e9b\u70b9\u662f\u4e0d\u662f\u90fd\u662f 1 \u5c31\u53ef\u4ee5\u5927\u6982\u7387\u77e5\u9053\u96c6\u5408\u4e2d\u6709\u6ca1\u6709\u5b83\u4e86<\/p>\n<ul>\n<li>\u5982\u679c\u8fd9\u4e9b\u70b9\u6709\u4efb\u4f55\u4e00\u4e2a 0\uff0c\u5219\u88ab\u67e5\u8be2\u53d8\u91cf\u4e00\u5b9a\u4e0d\u5728\uff1b<\/li>\n<li>\u5982\u679c\u90fd\u662f 1\uff0c\u5219\u88ab\u67e5\u8be2\u53d8\u91cf\u5f88<strong>\u53ef\u80fd\u5b58\u5728<\/strong><\/li>\n<\/ul>\n<p>\u4e3a\u4ec0\u4e48\u8bf4\u662f\u53ef\u80fd\u5b58\u5728\uff0c\u800c\u4e0d\u662f\u4e00\u5b9a\u5b58\u5728\u5462\uff1f\u90a3\u662f\u56e0\u4e3a\u6620\u5c04\u51fd\u6570\u672c\u8eab\u5c31\u662f\u6563\u5217\u51fd\u6570\uff0c\u6563\u5217\u51fd\u6570\u662f\u4f1a\u6709\u78b0\u649e\u7684\u3002<\/p>\n<h3>\u8bef\u5224\u7387<\/h3>\n<p>\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u8bef\u5224\u662f\u6307\u591a\u4e2a\u8f93\u5165\u7ecf\u8fc7\u54c8\u5e0c\u4e4b\u540e\u5728\u76f8\u540c\u7684bit\u4f4d\u7f6e1\u4e86\uff0c\u8fd9\u6837\u5c31\u65e0\u6cd5\u5224\u65ad\u7a76\u7adf\u662f\u54ea\u4e2a\u8f93\u5165\u4ea7\u751f\u7684\uff0c\u56e0\u6b64\u8bef\u5224\u7684\u6839\u6e90\u5728\u4e8e\u76f8\u540c\u7684 bit \u4f4d\u88ab\u591a\u6b21\u6620\u5c04\u4e14\u7f6e 1\u3002<\/p>\n<p>\u8fd9\u79cd\u60c5\u51b5\u4e5f\u9020\u6210\u4e86\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u5220\u9664\u95ee\u9898\uff0c\u56e0\u4e3a\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u6bcf\u4e00\u4e2a bit \u5e76\u4e0d\u662f\u72ec\u5360\u7684\uff0c\u5f88\u6709\u53ef\u80fd\u591a\u4e2a\u5143\u7d20\u5171\u4eab\u4e86\u67d0\u4e00\u4f4d\u3002\u5982\u679c\u6211\u4eec\u76f4\u63a5\u5220\u9664\u8fd9\u4e00\u4f4d\u7684\u8bdd\uff0c\u4f1a\u5f71\u54cd\u5176\u4ed6\u7684\u5143\u7d20\u3002(\u6bd4\u5982\u4e0a\u56fe\u4e2d\u7684\u7b2c 3 \u4f4d)<\/p>\n<h3>\u7279\u6027<\/h3>\n<ul>\n<li><strong>\u4e00\u4e2a\u5143\u7d20\u5982\u679c\u5224\u65ad\u7ed3\u679c\u4e3a\u5b58\u5728\u7684\u65f6\u5019\u5143\u7d20\u4e0d\u4e00\u5b9a\u5b58\u5728\uff0c\u4f46\u662f\u5224\u65ad\u7ed3\u679c\u4e3a\u4e0d\u5b58\u5728\u7684\u65f6\u5019\u5219\u4e00\u5b9a\u4e0d\u5b58\u5728<\/strong>\u3002<\/li>\n<li><strong>\u5e03\u9686\u8fc7\u6ee4\u5668\u53ef\u4ee5\u6dfb\u52a0\u5143\u7d20\uff0c\u4f46\u662f\u4e0d\u80fd\u5220\u9664\u5143\u7d20<\/strong>\u3002\u56e0\u4e3a\u5220\u6389\u5143\u7d20\u4f1a\u5bfc\u81f4\u8bef\u5224\u7387\u589e\u52a0\u3002<\/li>\n<\/ul>\n<h3>\u6dfb\u52a0\u4e0e\u67e5\u8be2\u5143\u7d20\u6b65\u9aa4<\/h3>\n<h4>\u6dfb\u52a0\u5143\u7d20<\/h4>\n<ol>\n<li>\u5c06\u8981\u6dfb\u52a0\u7684\u5143\u7d20\u7ed9 k \u4e2a\u54c8\u5e0c\u51fd\u6570<\/li>\n<li>\u5f97\u5230\u5bf9\u5e94\u4e8e\u4f4d\u6570\u7ec4\u4e0a\u7684 k \u4e2a\u4f4d\u7f6e<\/li>\n<li>\u5c06\u8fd9k\u4e2a\u4f4d\u7f6e\u8bbe\u4e3a 1<\/li>\n<\/ol>\n<h4>\u67e5\u8be2\u5143\u7d20<\/h4>\n<ol>\n<li>\u5c06\u8981\u67e5\u8be2\u7684\u5143\u7d20\u7ed9k\u4e2a\u54c8\u5e0c\u51fd\u6570<\/li>\n<li>\u5f97\u5230\u5bf9\u5e94\u4e8e\u4f4d\u6570\u7ec4\u4e0a\u7684k\u4e2a\u4f4d\u7f6e<\/li>\n<li>\u5982\u679ck\u4e2a\u4f4d\u7f6e\u6709\u4e00\u4e2a\u4e3a 0\uff0c\u5219\u80af\u5b9a\u4e0d\u5728\u96c6\u5408\u4e2d<\/li>\n<li>\u5982\u679ck\u4e2a\u4f4d\u7f6e\u5168\u90e8\u4e3a 1\uff0c\u5219\u53ef\u80fd\u5728\u96c6\u5408\u4e2d<\/li>\n<\/ol>\n<h3>\u4f18\u70b9<\/h3>\n<p>\u76f8\u6bd4\u4e8e\u5176\u5b83\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5e03\u9686\u8fc7\u6ee4\u5668\u5728\u7a7a\u95f4\u548c\u65f6\u95f4\u65b9\u9762\u90fd\u6709\u5de8\u5927\u7684\u4f18\u52bf\u3002\u5e03\u9686\u8fc7\u6ee4\u5668\u5b58\u50a8\u7a7a\u95f4\u548c\u63d2\u5165\/\u67e5\u8be2\u65f6\u95f4\u90fd\u662f\u5e38\u6570 $O(K)$\uff0c\u53e6\u5916\uff0c\u6563\u5217\u51fd\u6570\u76f8\u4e92\u4e4b\u95f4\u6ca1\u6709\u5173\u7cfb\uff0c\u65b9\u4fbf\u7531\u786c\u4ef6\u5e76\u884c\u5b9e\u73b0\u3002\u5e03\u9686\u8fc7\u6ee4\u5668\u4e0d\u9700\u8981\u5b58\u50a8\u5143\u7d20\u672c\u8eab\uff0c\u5728\u67d0\u4e9b\u5bf9\u4fdd\u5bc6\u8981\u6c42\u975e\u5e38\u4e25\u683c\u7684\u573a\u5408\u6709\u4f18\u52bf\u3002<\/p>\n<p>\u5e03\u9686\u8fc7\u6ee4\u5668\u53ef\u4ee5\u8868\u793a\u5168\u96c6\uff0c\u5176\u5b83\u4efb\u4f55\u6570\u636e\u7ed3\u6784\u90fd\u4e0d\u80fd\uff1b<\/p>\n<h3>\u7f3a\u70b9<\/h3>\n<p>\u4f46\u662f\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u7f3a\u70b9\u548c\u4f18\u70b9\u4e00\u6837\u660e\u663e\u3002\u8bef\u7b97\u7387\u662f\u5176\u4e2d\u4e4b\u4e00\u3002\u968f\u7740\u5b58\u5165\u7684\u5143\u7d20\u6570\u91cf\u589e\u52a0\uff0c\u8bef\u7b97\u7387\u968f\u4e4b\u589e\u52a0\u3002\u4f46\u662f\u5982\u679c\u5143\u7d20\u6570\u91cf\u592a\u5c11\uff0c\u5219\u4f7f\u7528\u6563\u5217\u8868\u8db3\u77e3\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u4e00\u822c\u60c5\u51b5\u4e0b\u4e0d\u80fd\u4ece\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d\u5220\u9664\u5143\u7d20\u3002\u6211\u4eec\u5f88\u5bb9\u6613\u60f3\u5230\u628a\u4f4d\u6570\u7ec4\u53d8\u6210\u6574\u6570\u6570\u7ec4\uff0c\u6bcf\u63d2\u5165\u4e00\u4e2a\u5143\u7d20\u76f8\u5e94\u7684\u8ba1\u6570\u5668\u52a0 1, \u8fd9\u6837\u5220\u9664\u5143\u7d20\u65f6\u5c06\u8ba1\u6570\u5668\u51cf\u6389\u5c31\u53ef\u4ee5\u4e86\u3002\u7136\u800c\u8981\u4fdd\u8bc1\u5b89\u5168\u5730\u5220\u9664\u5143\u7d20\u5e76\u975e\u5982\u6b64\u7b80\u5355\u3002\u9996\u5148\u6211\u4eec\u5fc5\u987b\u4fdd\u8bc1\u5220\u9664\u7684\u5143\u7d20\u7684\u786e\u5728\u5e03\u9686\u8fc7\u6ee4\u5668\u91cc\u9762\u3002\u8fd9\u4e00\u70b9\u5355\u51ed\u8fd9\u4e2a\u8fc7\u6ee4\u5668\u662f\u65e0\u6cd5\u4fdd\u8bc1\u7684\u3002\u53e6\u5916\u8ba1\u6570\u5668\u56de\u7ed5\u4e5f\u4f1a\u9020\u6210\u95ee\u9898\u3002<\/p>\n<p>\u5728\u964d\u4f4e\u8bef\u7b97\u7387\u65b9\u9762\uff0c\u6709\u4e0d\u5c11\u5de5\u4f5c\uff0c\u4f7f\u5f97\u51fa\u73b0\u4e86\u5f88\u591a\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u53d8\u79cd\u3002<\/p>\n<h2>\u5e03\u9686\u8fc7\u6ee4\u5668\u4f7f\u7528\u573a\u666f\u548c\u5b9e\u4f8b<\/h2>\n<p>\u5728\u7a0b\u5e8f\u7684\u4e16\u754c\u4e2d\uff0c\u5e03\u9686\u8fc7\u6ee4\u5668\u662f\u7a0b\u5e8f\u5458\u7684\u4e00\u628a\u5229\u5668\uff0c\u5229\u7528\u5b83\u53ef\u4ee5\u5feb\u901f\u5730\u89e3\u51b3\u9879\u76ee\u4e2d\u4e00\u4e9b\u6bd4\u8f83\u68d8\u624b\u7684\u95ee\u9898\u3002<\/p>\n<p>\u5982\u7f51\u9875 URL \u53bb\u91cd\u3001\u5783\u573e\u90ae\u4ef6\u8bc6\u522b\u3001\u5927\u96c6\u5408\u4e2d\u91cd\u590d\u5143\u7d20\u7684\u5224\u65ad\u548c\u7f13\u5b58\u7a7f\u900f\u7b49\u95ee\u9898\u3002<\/p>\n<p>\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u5178\u578b\u5e94\u7528\u6709\uff1a<\/p>\n<ul>\n<li>\u6570\u636e\u5e93\u9632\u6b62\u7a7f\u5e93\u3002 Google Bigtable\uff0cHBase \u548c Cassandra \u4ee5\u53ca Postgresql \u4f7f\u7528BloomFilter\u6765\u51cf\u5c11\u4e0d\u5b58\u5728\u7684\u884c\u6216\u5217\u7684\u78c1\u76d8\u67e5\u627e\u3002\u907f\u514d\u4ee3\u4ef7\u9ad8\u6602\u7684\u78c1\u76d8\u67e5\u627e\u4f1a\u5927\u5927\u63d0\u9ad8\u6570\u636e\u5e93\u67e5\u8be2\u64cd\u4f5c\u7684\u6027\u80fd\u3002<\/li>\n<li>\u4e1a\u52a1\u573a\u666f\u4e2d\u5224\u65ad\u7528\u6237\u662f\u5426\u9605\u8bfb\u8fc7\u67d0\u89c6\u9891\u6216\u6587\u7ae0\uff0c\u6bd4\u5982\u6296\u97f3\u6216\u5934\u6761\uff0c\u5f53\u7136\u4f1a\u5bfc\u81f4\u4e00\u5b9a\u7684\u8bef\u5224\uff0c\u4f46\u4e0d\u4f1a\u8ba9\u7528\u6237\u770b\u5230\u91cd\u590d\u7684\u5185\u5bb9\u3002<\/li>\n<li>\u7f13\u5b58\u5b95\u673a\u3001\u7f13\u5b58\u51fb\u7a7f\u573a\u666f\uff0c\u4e00\u822c\u5224\u65ad\u7528\u6237\u662f\u5426\u5728\u7f13\u5b58\u4e2d\uff0c\u5982\u679c\u5728\u5219\u76f4\u63a5\u8fd4\u56de\u7ed3\u679c\uff0c\u4e0d\u5728\u5219\u67e5\u8be2db\uff0c\u5982\u679c\u6765\u4e00\u6ce2\u51b7\u6570\u636e\uff0c\u4f1a\u5bfc\u81f4\u7f13\u5b58\u5927\u91cf\u51fb\u7a7f\uff0c\u9020\u6210\u96ea\u5d29\u6548\u5e94\uff0c\u8fd9\u65f6\u5019\u53ef\u4ee5\u7528\u5e03\u9686\u8fc7\u6ee4\u5668\u5f53\u7f13\u5b58\u7684\u7d22\u5f15\uff0c\u53ea\u6709\u5728\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d\uff0c\u624d\u53bb\u67e5\u8be2\u7f13\u5b58\uff0c\u5982\u679c\u6ca1\u67e5\u8be2\u5230\uff0c\u5219\u7a7f\u900f\u5230db\u3002\u5982\u679c\u4e0d\u5728\u5e03\u9686\u5668\u4e2d\uff0c\u5219\u76f4\u63a5\u8fd4\u56de\u3002<\/li>\n<li>WEB\u62e6\u622a\u5668\uff0c\u5982\u679c\u76f8\u540c\u8bf7\u6c42\u5219\u62e6\u622a\uff0c\u9632\u6b62\u91cd\u590d\u88ab\u653b\u51fb\u3002\u7528\u6237\u7b2c\u4e00\u6b21\u8bf7\u6c42\uff0c\u5c06\u8bf7\u6c42\u53c2\u6570\u653e\u5165\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d\uff0c\u5f53\u7b2c\u4e8c\u6b21\u8bf7\u6c42\u65f6\uff0c\u5148\u5224\u65ad\u8bf7\u6c42\u53c2\u6570\u662f\u5426\u88ab\u5e03\u9686\u8fc7\u6ee4\u5668\u547d\u4e2d\u3002\u53ef\u4ee5\u63d0\u9ad8\u7f13\u5b58\u547d\u4e2d\u7387\u3002Squid \u7f51\u9875\u4ee3\u7406\u7f13\u5b58\u670d\u52a1\u5668\u5728 cache digests \u4e2d\u5c31\u4f7f\u7528\u4e86\u5e03\u9686\u8fc7\u6ee4\u5668\u3002Google Chrome\u6d4f\u89c8\u5668\u4f7f\u7528\u4e86\u5e03\u9686\u8fc7\u6ee4\u5668\u52a0\u901f\u5b89\u5168\u6d4f\u89c8\u670d\u52a1<\/li>\n<li>Venti \u6587\u6863\u5b58\u50a8\u7cfb\u7edf\u4e5f\u91c7\u7528\u5e03\u9686\u8fc7\u6ee4\u5668\u6765\u68c0\u6d4b\u5148\u524d\u5b58\u50a8\u7684\u6570\u636e\u3002<\/li>\n<li>SPIN \u6a21\u578b\u68c0\u6d4b\u5668\u4e5f\u4f7f\u7528\u5e03\u9686\u8fc7\u6ee4\u5668\u5728\u5927\u89c4\u6a21\u9a8c\u8bc1\u95ee\u9898\u65f6\u8ddf\u8e2a\u53ef\u8fbe\u72b6\u6001\u7a7a\u95f4\u3002<\/li>\n<\/ul>\n<h2>Coding~<\/h2>\n<p>\u77e5\u9053\u4e86\u5e03\u9686\u8fc7\u6ee4\u53bb\u7684\u539f\u7406\u548c\u4f7f\u7528\u573a\u666f\uff0c\u6211\u4eec\u53ef\u4ee5\u81ea\u5df1\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u7684\u5e03\u9686\u8fc7\u6ee4\u5668<\/p>\n<h3>\u81ea\u5b9a\u4e49\u7684 BloomFilter<\/h3>\n<pre><code class=\"java\">public class MyBloomFilter {\n\n    \/**\n     * \u4e00\u4e2a\u957f\u5ea6\u4e3a10 \u4ebf\u7684\u6bd4\u7279\u4f4d\n     *\/\n    private static final int DEFAULT_SIZE = 256 &lt;&lt; 22;\n\n    \/**\n     * \u4e3a\u4e86\u964d\u4f4e\u9519\u8bef\u7387\uff0c\u4f7f\u7528\u52a0\u6cd5hash\u7b97\u6cd5\uff0c\u6240\u4ee5\u5b9a\u4e49\u4e00\u4e2a8\u4e2a\u5143\u7d20\u7684\u8d28\u6570\u6570\u7ec4\n     *\/\n    private static final int[] seeds = {3, 5, 7, 11, 13, 31, 37, 61};\n\n    \/**\n     * \u76f8\u5f53\u4e8e\u6784\u5efa 8 \u4e2a\u4e0d\u540c\u7684hash\u7b97\u6cd5\n     *\/\n    private static HashFunction[] functions = new HashFunction[seeds.length];\n\n    \/**\n     * \u521d\u59cb\u5316\u5e03\u9686\u8fc7\u6ee4\u5668\u7684 bitmap\n     *\/\n    private static BitSet bitset = new BitSet(DEFAULT_SIZE);\n\n    \/**\n     * \u6dfb\u52a0\u6570\u636e\n     *\n     * @param value \u9700\u8981\u52a0\u5165\u7684\u503c\n     *\/\n    public static void add(String value) {\n        if (value != null) {\n            for (HashFunction f : functions) {\n                \/\/\u8ba1\u7b97 hash \u503c\u5e76\u4fee\u6539 bitmap \u4e2d\u76f8\u5e94\u4f4d\u7f6e\u4e3a true\n                bitset.set(f.hash(value), true);\n            }\n        }\n    }\n\n    \/**\n     * \u5224\u65ad\u76f8\u5e94\u5143\u7d20\u662f\u5426\u5b58\u5728\n     * @param value \u9700\u8981\u5224\u65ad\u7684\u5143\u7d20\n     * @return \u7ed3\u679c\n     *\/\n    public static boolean contains(String value) {\n        if (value == null) {\n            return false;\n        }\n        boolean ret = true;\n        for (HashFunction f : functions) {\n            ret = bitset.get(f.hash(value));\n            \/\/\u4e00\u4e2a hash \u51fd\u6570\u8fd4\u56de false \u5219\u8df3\u51fa\u5faa\u73af\n            if (!ret) {\n                break;\n            }\n        }\n        return ret;\n    }\n\n    \/**\n     * \u6a21\u62df\u7528\u6237\u662f\u4e0d\u662f\u4f1a\u5458\uff0c\u6216\u7528\u6237\u5728\u4e0d\u5728\u7ebf\u3002\u3002\u3002\n     *\/\n    public static void main(String[] args) {\n\n        for (int i = 0; i &lt; seeds.length; i++) {\n            functions[i] = new HashFunction(DEFAULT_SIZE, seeds[i]);\n        }\n\n        \/\/ \u6dfb\u52a01\u4ebf\u6570\u636e\n        for (int i = 0; i &lt; 100000000; i++) {\n            add(String.valueOf(i));\n        }\n        String id = &quot;123456789&quot;;\n        add(id);\n\n        System.out.println(contains(id));   \/\/ true\n        System.out.println(&quot;&quot; + contains(&quot;234567890&quot;));  \/\/false\n    }\n}\n\nclass HashFunction {\n\n    private int size;\n    private int seed;\n\n    public HashFunction(int size, int seed) {\n        this.size = size;\n        this.seed = seed;\n    }\n\n    public int hash(String value) {\n        int result = 0;\n        int len = value.length();\n        for (int i = 0; i &lt; len; i++) {\n            result = seed * result + value.charAt(i);\n        }\n        int r = (size - 1) &amp; result;\n        return (size - 1) &amp; result;\n    }\n}<\/code><\/pre>\n<blockquote>\n<p>What\uff1f\u6211\u4eec\u5199\u7684\u8fd9\u4e9b\u65e9\u6709\u5927\u725b\u5e2e\u6211\u4eec\u5b9e\u73b0\uff0c\u8fd8\u9020\u8f6e\u5b50\uff0c\u771f\u662f\u6d6a\u8d39\u65f6\u95f4\uff0cNo\uff0cNo\uff0cNo\uff0c\u6211\u4eec\u5b66\u4e60\u8fc7\u7a0b\u4e2d\u662f\u53ef\u4ee5\u9020\u8f6e\u5b50\u7684\uff0c\u9020\u8f6e\u5b50\u672c\u8eab\u5c31\u662f\u6211\u4eec\u81ea\u5df1\u5bf9\u8bbe\u8ba1\u548c\u5b9e\u73b0\u7684\u5177\u4f53\u843d\u5730\u8fc7\u7a0b\uff0c\u4e0d\u4ec5\u80fd\u63d0\u9ad8\u6211\u4eec\u7684\u7f16\u7a0b\u80fd\u529b\uff0c\u5728\u9020\u8f6e\u5b50\u7684\u8fc7\u7a0b\u4e2d\u80af\u5b9a\u4f1a\u9047\u5230\u5f88\u591a\u6211\u4eec\u6ca1\u6709\u601d\u8003\u8fc7\u7684\u95ee\u9898\uff0c\u6210\u957f\u770b\u7684\u89c1~~<\/p>\n<p>\u5b9e\u9645\u9879\u76ee\u4f7f\u7528\u7684\u65f6\u5019\uff0c\u9886\u5bfc\u548c\u6211\u8bf4\u9879\u76ee\u4e00\u5b9a\u8981\u7a33\u5b9a\u8fd0\u884c\uff0c\u6ca1\u81ea\u4fe1\u7684\u6211\u653e\u5f03\u4e86\u81ea\u5df1\u7684\u8f6e\u5b50\u3002<\/p>\n<\/blockquote>\n<h3>Guava \u4e2d\u7684 BloomFilter<\/h3>\n<pre><code class=\"xml\">&lt;dependency&gt;\n    &lt;groupId&gt;com.google.guava&lt;\/groupId&gt;\n    &lt;artifactId&gt;guava&lt;\/artifactId&gt;\n    &lt;version&gt;23.0&lt;\/version&gt;\n&lt;\/dependency&gt;<\/code><\/pre>\n<pre><code class=\"java\">public class GuavaBloomFilterDemo {\n\n    public static void main(String[] args) {\n        \/\/\u540e\u8fb9\u4e24\u4e2a\u53c2\u6570\uff1a\u9884\u8ba1\u5305\u542b\u7684\u6570\u636e\u91cf\uff0c\u548c\u5141\u8bb8\u7684\u8bef\u5dee\u503c\n        BloomFilter&lt;Integer&gt; bloomFilter = BloomFilter.create(Funnels.integerFunnel(), 100000, 0.01);\n        for (int i = 0; i &lt; 100000; i++) {\n            bloomFilter.put(i);\n        }\n        System.out.println(bloomFilter.mightContain(1));\n        System.out.println(bloomFilter.mightContain(2));\n        System.out.println(bloomFilter.mightContain(3));\n        System.out.println(bloomFilter.mightContain(100001));\n\n        \/\/bloomFilter.writeTo();\n    }\n}<\/code><\/pre>\n<p>\u5206\u5e03\u5f0f\u73af\u5883\u4e2d\uff0c\u5e03\u9686\u8fc7\u6ee4\u5668\u80af\u5b9a\u8fd8\u9700\u8981\u8003\u8651\u662f\u53ef\u4ee5\u5171\u4eab\u7684\u8d44\u6e90\uff0c\u8fd9\u65f6\u5019\u6211\u4eec\u4f1a\u60f3\u5230 Redis\uff0c\u662f\u7684\uff0cRedis \u4e5f\u5b9e\u73b0\u4e86\u5e03\u9686\u8fc7\u6ee4\u5668\u3002<\/p>\n<p><strong>\u5f53\u7136\u6211\u4eec\u4e5f\u53ef\u4ee5\u628a\u5e03\u9686\u8fc7\u6ee4\u5668\u901a\u8fc7 <code>bloomFilter.writeTo()<\/code> \u5199\u5165\u4e00\u4e2a\u6587\u4ef6\uff0c\u653e\u5165OSS\u3001S3\u8fd9\u7c7b\u5bf9\u8c61\u5b58\u50a8\u4e2d\u3002<\/strong><\/p>\n<h3>Redis \u4e2d\u7684 BloomFilter<\/h3>\n<p>Redis \u63d0\u4f9b\u7684 bitMap \u53ef\u4ee5\u5b9e\u73b0\u5e03\u9686\u8fc7\u6ee4\u5668\uff0c\u4f46\u662f\u9700\u8981\u81ea\u5df1\u8bbe\u8ba1\u6620\u5c04\u51fd\u6570\u548c\u4e00\u4e9b\u7ec6\u8282\uff0c\u8fd9\u548c\u6211\u4eec\u81ea\u5b9a\u4e49\u6ca1\u5565\u533a\u522b\u3002<\/p>\n<p>Redis \u5b98\u65b9\u63d0\u4f9b\u7684\u5e03\u9686\u8fc7\u6ee4\u5668\u5230\u4e86 Redis 4.0 \u63d0\u4f9b\u4e86\u63d2\u4ef6\u529f\u80fd\u4e4b\u540e\u624d\u6b63\u5f0f\u767b\u573a\u3002\u5e03\u9686\u8fc7\u6ee4\u5668\u4f5c\u4e3a\u4e00\u4e2a\u63d2\u4ef6\u52a0\u8f7d\u5230 Redis Server \u4e2d\uff0c\u7ed9 Redis \u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5e03\u9686\u53bb\u91cd\u529f\u80fd\u3002<\/p>\n<p>\u5728\u5df2\u5b89\u88c5 Redis \u7684\u524d\u63d0\u4e0b\uff0c\u5b89\u88c5 RedisBloom\uff0c\u6709\u4e24\u79cd\u65b9\u5f0f<\/p>\n<p><strong>\u76f4\u63a5\u7f16\u8bd1\u8fdb\u884c\u5b89\u88c5<\/strong><\/p>\n<pre><code class=\"shell\">git clone https:\/\/github.com\/RedisBloom\/RedisBloom.git\ncd RedisBloom\nmake     #\u7f16\u8bd1 \u4f1a\u751f\u6210\u4e00\u4e2arebloom.so\u6587\u4ef6\nredis-server --loadmodule \/path\/to\/rebloom.so   #\u8fd0\u884credis\u65f6\u52a0\u8f7d\u5e03\u9686\u8fc7\u6ee4\u5668\u6a21\u5757\nredis-cli    # \u542f\u52a8\u8fde\u63a5\u5bb9\u5668\u4e2d\u7684 redis \u5ba2\u6237\u7aef\u9a8c\u8bc1<\/code><\/pre>\n<p><strong>\u4f7f\u7528Docker\u8fdb\u884c\u5b89\u88c5<\/strong><\/p>\n<pre><code class=\"shell\">docker pull redislabs\/rebloom:latest # \u62c9\u53d6\u955c\u50cf\ndocker run -p 6379:6379 --name redis-redisbloom redislabs\/rebloom:latest #\u8fd0\u884c\u5bb9\u5668\ndocker exec -it redis-redisbloom bash\nredis-cli     <\/code><\/pre>\n<p><strong>\u4f7f\u7528<\/strong><\/p>\n<p>\u5e03\u9686\u8fc7\u6ee4\u5668\u57fa\u672c\u6307\u4ee4\uff1a<\/p>\n<ul>\n<li>bf.add \u6dfb\u52a0\u5143\u7d20\u5230\u5e03\u9686\u8fc7\u6ee4\u5668<\/li>\n<li>bf.exists \u5224\u65ad\u5143\u7d20\u662f\u5426\u5728\u5e03\u9686\u8fc7\u6ee4\u5668<\/li>\n<li>bf.madd \u6dfb\u52a0\u591a\u4e2a\u5143\u7d20\u5230\u5e03\u9686\u8fc7\u6ee4\u5668\uff0cbf.add \u53ea\u80fd\u6dfb\u52a0\u4e00\u4e2a<\/li>\n<li>bf.mexists \u5224\u65ad\u591a\u4e2a\u5143\u7d20\u662f\u5426\u5728\u5e03\u9686\u8fc7\u6ee4\u5668<\/li>\n<\/ul>\n<pre><code>127.0.0.1:6379&gt; bf.add user Tom\n(integer) 1\n127.0.0.1:6379&gt; bf.add user John\n(integer) 1\n127.0.0.1:6379&gt; bf.exists user Tom\n(integer) 1\n127.0.0.1:6379&gt; bf.exists user Linda\n(integer) 0\n127.0.0.1:6379&gt; bf.madd user Barry Jerry Mars\n1) (integer) 1\n2) (integer) 1\n3) (integer) 1\n127.0.0.1:6379&gt; bf.mexists user Barry Linda\n1) (integer) 1\n2) (integer) 0<\/code><\/pre>\n<p>\u6211\u4eec\u53ea\u6709\u8fd9\u51e0\u4e2a\u53c2\u6570\uff0c\u80af\u5b9a\u4e0d\u4f1a\u6709\u8bef\u5224\uff0c\u5f53\u5143\u7d20\u9010\u6e10\u589e\u591a\u65f6\uff0c\u5c31\u4f1a\u6709\u4e00\u5b9a\u7684\u8bef\u5224\u4e86\uff0c\u8fd9\u91cc\u5c31\u4e0d\u505a\u8fd9\u4e2a\u5b9e\u9a8c\u4e86\u3002<\/p>\n<p>\u4e0a\u9762\u4f7f\u7528\u7684\u5e03\u9686\u8fc7\u6ee4\u5668\u53ea\u662f\u9ed8\u8ba4\u53c2\u6570\u7684\u5e03\u9686\u8fc7\u6ee4\u5668\uff0c\u5b83\u5728\u6211\u4eec\u7b2c\u4e00\u6b21 add \u7684\u65f6\u5019\u81ea\u52a8\u521b\u5efa\u3002<\/p>\n<p>Redis \u8fd8\u63d0\u4f9b\u4e86\u81ea\u5b9a\u4e49\u53c2\u6570\u7684\u5e03\u9686\u8fc7\u6ee4\u5668\uff0c<code>bf.reserve \u8fc7\u6ee4\u5668\u540d error_rate initial_size<\/code><\/p>\n<ul>\n<li>error_rate\uff1a\u5141\u8bb8\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u9519\u8bef\u7387\uff0c\u8fd9\u4e2a\u503c\u8d8a\u4f4e\u8fc7\u6ee4\u5668\u7684\u4f4d\u6570\u7ec4\u7684\u5927\u5c0f\u8d8a\u5927\uff0c\u5360\u7528\u7a7a\u95f4\u4e5f\u5c31\u8d8a\u5927<\/li>\n<li>initial_size\uff1a\u5e03\u9686\u8fc7\u6ee4\u5668\u53ef\u4ee5\u50a8\u5b58\u7684\u5143\u7d20\u4e2a\u6570\uff0c\u5f53\u5b9e\u9645\u5b58\u50a8\u7684\u5143\u7d20\u4e2a\u6570\u8d85\u8fc7\u8fd9\u4e2a\u503c\u4e4b\u540e\uff0c\u8fc7\u6ee4\u5668\u7684\u51c6\u786e\u7387\u4f1a\u4e0b\u964d<\/li>\n<\/ul>\n<p>\u4f46\u662f\u8fd9\u4e2a\u64cd\u4f5c\u9700\u8981\u5728 add \u4e4b\u524d\u663e\u5f0f\u521b\u5efa\u3002\u5982\u679c\u5bf9\u5e94\u7684 key \u5df2\u7ecf\u5b58\u5728\uff0cbf.reserve \u4f1a\u62a5\u9519<\/p>\n<pre><code>127.0.0.1:6379&gt; bf.reserve user 0.01 100\n(error) ERR item exists\n127.0.0.1:6379&gt; bf.reserve topic 0.01 1000\nOK<\/code><\/pre>\n<p>\u6211\u662f\u4e00\u540d Javaer\uff0c\u80af\u5b9a\u8fd8\u8981\u7528 Java \u6765\u5b9e\u73b0\u7684\uff0cJava \u7684 Redis \u5ba2\u6237\u7aef\u6bd4\u8f83\u591a\uff0c\u6709\u4e9b\u8fd8\u6ca1\u6709\u63d0\u4f9b\u6307\u4ee4\u6269\u5c55\u673a\u5236\uff0c\u7b14\u8005\u5df2\u77e5\u7684 Redisson \u548c lettuce \u662f\u53ef\u4ee5\u4f7f\u7528\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\uff0c\u6211\u4eec\u8fd9\u91cc\u7528 <a href=\"https:\/\/link.segmentfault.com\/?enc=aNx3v8K19zAIdRk3UglY4Q%3D%3D.XXjR%2FGDghLWBGfJAYUV4wvcWao2Gfkgk9yfAPIk6%2BMWXX2tZZjEmledDffKB%2BB1IJXRtpguyw04%2FobMf3%2FtMmmobqFhiQFrsrGuVSXRpyG%2B7uP%2BzRqJpSzH2NSz%2F1Y%2B6\" rel=\"nofollow\">Redisson<\/a><\/p>\n<pre><code class=\"java\">public class RedissonBloomFilterDemo {\n\n    public static void main(String[] args) {\n\n        Config config = new Config();\n        config.useSingleServer().setAddress(&quot;redis:\/\/127.0.0.1:6379&quot;);\n        RedissonClient redisson = Redisson.create(config);\n\n        RBloomFilter&lt;String&gt; bloomFilter = redisson.getBloomFilter(&quot;user&quot;);\n        \/\/ \u521d\u59cb\u5316\u5e03\u9686\u8fc7\u6ee4\u5668\uff0c\u9884\u8ba1\u7edf\u8ba1\u5143\u7d20\u6570\u91cf\u4e3a55000000\uff0c\u671f\u671b\u8bef\u5dee\u7387\u4e3a0.03\n        bloomFilter.tryInit(55000000L, 0.03);\n        bloomFilter.add(&quot;Tom&quot;);\n        bloomFilter.add(&quot;Jack&quot;);\n        System.out.println(bloomFilter.count());   \/\/2\n        System.out.println(bloomFilter.contains(&quot;Tom&quot;));  \/\/true\n        System.out.println(bloomFilter.contains(&quot;Linda&quot;));  \/\/false\n    }\n}<\/code><\/pre>\n<h2>\u6269\u5c55<\/h2>\n<p>\u4e3a\u4e86\u89e3\u51b3\u5e03\u9686\u8fc7\u6ee4\u5668\u4e0d\u80fd\u5220\u9664\u5143\u7d20\u7684\u95ee\u9898\uff0c\u5e03\u8c37\u9e1f\u8fc7\u6ee4\u5668\u6a2a\u7a7a\u51fa\u4e16\u3002\u8bba\u6587\u300aCuckoo Filter\uff1aBetter Than Bloom\u300b\u4f5c\u8005\u5c06\u5e03\u8c37\u9e1f\u8fc7\u6ee4\u5668\u548c\u5e03\u9686\u8fc7\u6ee4\u5668\u8fdb\u884c\u4e86\u6df1\u5165\u7684\u5bf9\u6bd4\u3002\u76f8\u6bd4\u5e03\u8c37\u9e1f\u8fc7\u6ee4\u5668\u800c\u8a00\u5e03\u9686\u8fc7\u6ee4\u5668\u6709\u4ee5\u4e0b\u4e0d\u8db3\uff1a\u67e5\u8be2\u6027\u80fd\u5f31\u3001\u7a7a\u95f4\u5229\u7528\u6548\u7387\u4f4e\u3001\u4e0d\u652f\u6301\u53cd\u5411\u64cd\u4f5c\uff08\u5220\u9664\uff09\u4ee5\u53ca\u4e0d\u652f\u6301\u8ba1\u6570\u3002<\/p>\n<p>\u7531\u4e8e\u4f7f\u7528\u8f83\u5c11\uff0c\u6682\u4e0d\u6df1\u5165\u3002<\/p>\n<h2>\u53c2\u8003\u4e0e\u611f\u8c22<\/h2>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=WWwRoUohv5GQ7CW%2F%2FH2UWQ%3D%3D.%2Bhn9t%2FxV3i9cnAJHKCk1yqUxbkMfYfsFe9hh467Y%2Bop0usFXURDlMiCc5%2FKl8%2FC%2BbZf0T2%2F%2BSe6XN52mn4vMfw%3D%3D\" rel=\"nofollow\">https:\/\/www.cs.cmu.edu\/~dga\/papers\/cuckoo-conext2014.pdf<\/a><\/p>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=wgme3xZhXl5IP6gxd%2FqgAA%3D%3D.IE0yOlNKVUT8N0eDOIMRmfVNw2Sgg3xgC%2F5UzBCW1UdurxkAQ2JQXnZh2D6euHIpYENn%2B44EKdh6WlFlgXgxtw%3D%3D\" rel=\"nofollow\">http:\/\/www.justdojava.com\/2019\/10\/22\/bloomfilter\/<\/a><\/p>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=Xxb%2FAb7xjXuLs8BVyNyP0w%3D%3D.w7WLbTX3K9nZMh%2F3SlSNZvjTblCb2ScoAqbItoEubVk4mfjQSoZ0DvtbloOvIZfW\" rel=\"nofollow\">https:\/\/www.cnblogs.com\/cpselvis\/p\/6265825.html<\/a><\/p>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=4Usgr6bOSDDx3S74J8sTlA%3D%3D.THqz7MztdQ5mBQZTizX7Hy9H2C5jz6tUmBKUZo2F2oZ6NCMItZgkoKhjbS4YFE6X\" rel=\"nofollow\">https:\/\/juejin.im\/post\/5cc5aa7ce51d456e431adac5<\/a><\/p>\n<p>\u672c\u6587\u7531<a href=\"https:\/\/link.segmentfault.com\/?enc=ziAobhAC%2F0hE1bu5zkwwJA%3D%3D.Qg9yiqpFDsD3lGnbCopTa4RUYs0t8o1jB%2BCxMW2%2FoWY%3D\" rel=\"nofollow\">mdnice<\/a>\u591a\u5e73\u53f0\u53d1\u5e03<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000043932169\">https:\/\/segmentfault.com\/a\/1190000043932169<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ec0\u4e48\u662f BloomFilter \u5e03\u9686\u8fc7\u6ee4\u5668\uff08\u82f1\u8bed\uff1aBloom Filter\uff09\u662f 1970 \u5e74\u7531\u5e03\u9686\u63d0\u51fa\u7684\u3002\u5b83\u5b9e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10007984","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10007984","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10007984"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10007984\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10007984"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10007984"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10007984"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}