{"id":201594,"date":"2025-05-10T10:48:19","date_gmt":"2025-05-10T02:48:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201594\/"},"modified":"2025-05-10T10:48:19","modified_gmt":"2025-05-10T02:48:19","slug":"redis%e4%bd%bf%e7%94%a8bitmap%e7%9a%84%e6%96%b9%e6%b3%95%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201594\/","title":{"rendered":"Redis\u4f7f\u7528Bitmap\u7684\u65b9\u6cd5\u5b9e\u73b0"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>Redis\u4f7f\u7528Bitmap\u7684\u65b9\u6cd5\u5b9e\u73b0<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u4eca\u65e5\u4e0d\u80af\u57cb\u5934\uff0c\u660e\u65e5\u4f55\u4ee5\u62ac\u5934\uff01\u6bcf\u65e5\u4e00\u53e5\u52aa\u529b\u81ea\u5df1\u7684\u8bdd\u54c8\u54c8~\u54c8\u55bd\uff0c\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7<span style=\"color: #FF6600;font-family:\">\u300aRedis\u4f7f\u7528Bitmap\u7684\u65b9\u6cd5\u5b9e\u73b0\u300b<\/span>\uff0c\u4e3b\u8981\u5185\u5bb9\u662f\u8bb2\u89e3<span style=\"color: #FF6600;font-family:\">redisbitmap<\/span>\u7b49\u7b49\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u6536\u85cf\u6216\u8005\u6709\u66f4\u597d\u7684\u5efa\u8bae\u5728\u8bc4\u8bba\u63d0\u51fa\uff0c\u6211\u90fd\u4f1a\u8ba4\u771f\u770b\u7684\uff01\u5927\u5bb6\u4e00\u8d77\u8fdb\u6b65\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n<h2>1. Bitmap \u662f\u4ec0\u4e48<\/h2>\n<p>Bitmap(\u4e5f\u79f0\u4e3a\u4f4d\u6570\u7ec4\u6216\u8005\u4f4d\u5411\u91cf\u7b49)\u662f\u4e00\u79cd\u5b9e\u73b0\u5bf9\u4f4d\u7684\u64cd\u4f5c\u7684&#8217;\u6570\u636e\u7ed3\u6784&#8217;\uff0c\u5728\u6570\u636e\u7ed3\u6784\u52a0\u5f15\u53f7\u4e3b\u8981\u56e0\u4e3a\uff1a<\/p>\n<ul>\n<li>Bitmap \u672c\u8eab\u4e0d\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5e95\u5c42\u5b9e\u9645\u4e0a\u662f\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u501f\u52a9\u5b57\u7b26\u4e32\u8fdb\u884c\u4f4d\u64cd\u4f5c\u3002<\/li>\n<li>Bitmap \u5355\u72ec\u63d0\u4f9b\u4e86\u4e00\u5957\u547d\u4ee4\uff0c\u6240\u4ee5\u4e0e\u4f7f\u7528\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u4e0d\u592a\u76f8\u540c\u3002\u53ef\u4ee5\u628a Bitmaps \u60f3\u8c61\u6210\u4e00\u4e2a\u4ee5\u4f4d\u4e3a\u5355\u4f4d\u7684\u6570\u7ec4\uff0c\u6570\u7ec4\u7684\u6bcf\u4e2a\u5355\u5143\u53ea\u80fd\u5b58\u50a8 0 \u548c 1\uff0c\u6570\u7ec4\u7684\u4e0b\u6807\u5728 Bitmap \u4e2d\u53eb\u505a\u504f\u79fb\u91cf offset\u3002<\/li>\n<\/ul>\n<h2>2. \u5360\u7528\u5b58\u50a8\u7a7a\u95f4<\/h2>\n<p>\u5982\u4e0a\u6211\u4eec\u77e5\u9053 Bitmap \u672c\u8eab\u4e0d\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5e95\u5c42\u5b9e\u9645\u4e0a\u4f7f\u7528\u5b57\u7b26\u4e32\u6765\u5b58\u50a8\u3002\u7531\u4e8e Redis \u4e2d\u5b57\u7b26\u4e32\u7684\u6700\u5927\u957f\u5ea6\u662f 512 MB\u5b57\u8282\uff0c\u6240\u4ee5 BitMap \u7684\u504f\u79fb\u91cf offset \u503c\u4e5f\u662f\u6709\u4e0a\u9650\u7684\uff0c\u5176\u6700\u5927\u503c\u662f\uff1a8 * 1024 * 1024 * 512 = 2^32\u3002\u7531\u4e8e C \u8bed\u8a00\u4e2d\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u90fd\u8981\u5b58\u50a8\u4e00\u4f4d\u5206\u9694\u7b26\uff0c\u6240\u4ee5\u5b9e\u9645\u4e0a BitMap \u7684\u504f\u79fb\u91cf offset \u503c\u4e0a\u9650\u662f\uff1a2^32-1\u3002Bitmap \u5b9e\u9645\u5360\u7528\u5b58\u50a8\u7a7a\u95f4\u53d6\u51b3\u4e8e BitMap \u504f\u79fb\u91cf offset \u7684\u6700\u5927\u503c\uff0c\u5360\u7528\u5b57\u8282\u6570\u53ef\u4ee5\u7528 (max_offset \/ 8) + 1 \u516c\u5f0f\u6765\u8ba1\u7b97\u6216\u8005\u76f4\u63a5\u501f\u52a9\u5e95\u5c42\u5b57\u7b26\u4e32\u51fd\u6570 strlen \u6765\u8ba1\u7b97\uff1a<\/p>\n<pre>127.0.0.1:6379&gt; setbit login:20220515 0 1\n(integer) 0\n# (0 \/ 8) + 1 = 1\n127.0.0.1:6379&gt; strlen login:20220515\n(integer) 1\n127.0.0.1:6379&gt; setbit login:20220515 8 1\n(integer) 0\n# (8 \/ 8) + 1 = 2\n127.0.0.1:6379&gt; strlen login:20220515\n(integer) 2<\/pre>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728957563f968670833d.png\" class=\"aligncenter\"><\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728\u7b2c\u4e00\u6b21\u521d\u59cb\u5316 Bitmap \u65f6\uff0c\u5047\u5982\u504f\u79fb\u91cf offset \u975e\u5e38\u5927\uff0c\u7531\u4e8e\u9700\u8981\u5206\u914d\u6240\u9700\u8981\u7684\u5185\u5b58\uff0c\u6574\u4e2a\u521d\u59cb\u5316\u8fc7\u7a0b\u6267\u884c\u4f1a\u6bd4\u8f83\u6162\uff0c\u53ef\u80fd\u4f1a\u9020\u6210 Redis \u7684\u963b\u585e\u3002\u5728 2010 \u6b3e MacBook Pro \u4e0a\uff0c\u8bbe\u7f6e\u7b2c 2^32-1 \u4f4d\uff0c\u7531\u4e8e\u9700\u8981\u5206\u914d 512MB \u5185\u5b58\uff0c\u6240\u4ee5\u5927\u7ea6\u9700\u8981 300 \u6beb\u79d2\uff1b\u8bbe\u7f6e\u7b2c 2^30-1 \u4f4d\uff08128 MB\uff09\u5927\u7ea6\u9700\u8981 80 \u6beb\u79d2\uff1b\u8bbe\u7f6e\u7b2c 2^28 -1 \u4f4d\uff0832MB\uff09\u9700\u8981\u7ea6 30 \u6beb\u79d2\uff1b\u8bbe\u7f6e\u7b2c 2^26 -1\uff088MB\uff09\u9700\u8981\u7ea6 8 \u6beb\u79d2\u3002\u4e00\u65e6\u5b8c\u6210\u7b2c\u4e00\u6b21\u5206\u914d\uff0c\u968f\u540e\u5bf9\u540c\u4e00 key \u518d\u8bbe\u7f6e\u5c06\u4e0d\u4f1a\u4ea7\u751f\u5206\u914d\u5f00\u9500\u3002<\/p>\n<h2>3. \u547d\u4ee4<\/h2>\n<p>\u4e0b\u9762\u793a\u4f8b\u4e2d\u6211\u4eec\u5c06\u767b\u5f55 App \u7684\u7528\u6237\u5b58\u653e\u5728 Bitmap \u4e2d\uff0c\u767b\u5f55\u7684\u7528\u6237\u8bb0\u505a 1\uff0c\u6ca1\u6709\u767b\u5f55\u7684\u7528\u6237\u8bb0\u505a 0\uff0c\u7528\u504f\u79fb\u91cf\u4f5c\u4e3a\u7528\u6237\u7684id\u3002<\/p>\n<h3>3.1 SETBIT<\/h3>\n<p>\u6700\u65e9\u53ef\u7528\u7248\u672c\uff1a2.2.0\u3002\u65f6\u95f4\u590d\u6742\u5ea6\uff1aO(1)\u3002<\/p>\n<p>\u8bed\u6cd5\u683c\u5f0f\uff1a<\/p>\n<pre>SETBIT key offset value<\/pre>\n<p>SETBIT \u7528\u6765\u8bbe\u7f6e key \u5bf9\u5e94\u7b2c offset \u4f4d\u7684\u503c\uff08offset \u4ece 0 \u5f00\u59cb\u7b97\uff09\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u4e3a 0 \u6216\u8005 1\u3002\u5f53\u6307\u5b9a\u7684 KEY \u4e0d\u5b58\u5728\u65f6\uff0c\u4f1a\u81ea\u52a8\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u503c\u3002\u5b57\u7b26\u4e32\u4f1a\u8fdb\u884c\u6269\u5c55\u4ee5\u786e\u4fdd\u53ef\u4ee5\u5c06 value \u4fdd\u5b58\u5728\u6307\u5b9a\u7684\u504f\u79fb\u91cf offset \u4e0a\u3002\u5f53\u5b57\u7b26\u4e32\u503c\u8fdb\u884c\u6269\u5c55\u65f6\uff0c\u7a7a\u767d\u4f4d\u7f6e\u7528 0 \u6765\u586b\u5145\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f offset \u9700\u8981\u5927\u4e8e\u6216\u7b49\u4e8e 0\uff0c\u5c0f\u4e8e 2 \u7684 32 \u6b21\u65b9\u3002<\/p>\n<p>\u5047\u8bbe\u73b0\u5728\u6709 10 \u4e2a\u7528\u6237\uff0c\u7528\u6237id\u4e3a 0\u30011\u30015\u30019 \u7684 4 \u4e2a\u7528\u6237\u5728 20220514 \u8fdb\u884c\u4e86\u767b\u5f55\uff0c\u90a3\u4e48\u5f53\u524d Bitmap \u521d\u59cb\u5316\u7ed3\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728957563f968676e951.png\" class=\"aligncenter\"><\/p>\n<p>\u5177\u4f53\u64cd\u4f5c\u8fc7\u7a0b\u5982\u4e0b\uff0clogin:20220514 \u4ee3\u8868 20220514 \u8fd9\u5929\u6240\u6709\u767b\u5f55\u7528\u6237\u7684 Bitmap\uff1a<\/p>\n<pre>127.0.0.1:6379&gt; setbit login:20220514 0 1\n(integer) 0\n127.0.0.1:6379&gt; setbit login:20220514 1 1\n(integer) 0\n127.0.0.1:6379&gt; setbit login:20220514 5 1\n(integer) 0\n127.0.0.1:6379&gt; setbit login:20220514 9 1\n(integer) 0<\/pre>\n<p>\u5047\u8bbe\u7528\u6237 uid \u4e3a 15 \u7684\u7528\u6237\u4e5f\u767b\u5f55\u4e86 App\uff0c\u90a3\u4e48 Bitmap \u7684\u7ed3\u6784\u53d8\u6210\u4e86\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u7b2c 10 \u4f4d\u5230\u7b2c 14 \u4f4d\u90fd\u7528 0 \u586b\u5145\uff0c\u7b2c 15 \u4f4d\u88ab\u7f6e\u4e3a 1\uff1a<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728957563f96867d0ec3.png\" class=\"aligncenter\"><\/p>\n<p>\u5f88\u591a\u5e94\u7528\u7684\u7528\u6237id\u4ee5\u4e00\u4e2a\u6307\u5b9a\u6570\u5b57\uff08\u4f8b\u5982 150000000000\uff09\u5f00\u5934\uff0c\u76f4\u63a5\u5c06\u7528\u6237id\u548c Bitmap \u7684\u504f\u79fb\u91cf\u5bf9\u5e94\u52bf\u5fc5\u4f1a\u9020\u6210\u4e00\u5b9a\u7684\u6d6a\u8d39\uff0c\u901a\u5e38\u7684\u505a\u6cd5\u662f\u6bcf\u6b21\u505a setbit \u64cd\u4f5c\u65f6\u5c06\u7528\u6237id\u51cf\u53bb\u8fd9\u4e2a\u6307\u5b9a\u6570\u5b57\u3002\u5728\u7b2c\u4e00\u6b21\u521d\u59cb\u5316 Bitmap \u65f6\uff0c\u5047\u5982\u504f\u79fb\u91cf\u975e\u5e38\u5927\uff0c\u90a3\u4e48\u6574\u4e2a\u521d\u59cb\u5316\u8fc7\u7a0b\u6267\u884c\u4f1a\u6bd4\u8f83\u6162\uff0c\u53ef\u80fd\u4f1a\u9020\u6210 Redis \u7684\u963b\u585e\u3002<\/p>\n<h3>3.2 GETBIT<\/h3>\n<p>\u6700\u65e9\u53ef\u7528\u7248\u672c\uff1a2.2.0\u3002\u65f6\u95f4\u590d\u6742\u5ea6\uff1aO(1)\u3002<\/p>\n<p>\u8bed\u6cd5\u683c\u5f0f\uff1a<\/p>\n<pre>GETBIT key offset<\/pre>\n<p>\u83b7\u53d6 key \u5bf9\u5e94\u7b2c offset \u4f4d\u7684\u503c\uff08offset \u4ece 0 \u5f00\u59cb\u7b97\uff09\u3002\u5f53 offset \u8d85\u8fc7\u5b57\u7b26\u4e32\u957f\u5ea6\u65f6\uff0c\u5b57\u7b26\u4e32\u5047\u5b9a\u4e3a\u4e00\u4e2a 0 \u4f4d\u7684\u8fde\u7eed\u7a7a\u95f4\u3002\u5f53\u6307\u5b9a\u7684 key \u4e0d\u5b58\u5728\u65f6\uff0c\u5047\u5b9a\u4e3a\u4e00\u4e2a\u7a7a\u5b57\u7b26\u4e32\uff0coffset \u80af\u5b9a\u662f\u8d85\u51fa\u5b57\u7b26\u4e32\u957f\u5ea6\u8303\u56f4\uff0c\u56e0\u6b64\u8be5\u503c\u4e5f\u88ab\u5047\u5b9a\u4e3a 0 \u4f4d\u7684\u8fde\u7eed\u7a7a\u95f4\uff0c\u90fd\u4f1a\u8fd4\u56de 0\u3002<\/p>\n<p>\u4e0b\u9762\u83b7\u53d6\u7528\u6237id\u4e3a 4 \u7684\u7528\u6237\u662f\u5426\u5728 20220514 \u8fd9\u5929\u767b\u5f55\u8fc7\uff0c\u8fd4\u56de 0 \u8bf4\u660e\u6ca1\u6709\u8bbf\u95ee\u8fc7\uff1a<\/p>\n<pre>127.0.0.1:6379&gt; getbit login:20220514 4\n(integer) 0<\/pre>\n<p>\u4e0b\u9762\u83b7\u53d6\u7528\u6237id\u4e3a 5 \u7684\u7528\u6237\u662f\u5426\u5728 20220514 \u8fd9\u5929\u767b\u5f55\u8fc7\uff0c\u8fd4\u56de 1 \u8bf4\u660e\u8bbf\u95ee\u8fc7\uff1a<\/p>\n<pre>127.0.0.1:6379&gt; getbit login:20220514 5\n(integer) 1<\/pre>\n<p>\u4e0b\u9762\u83b7\u53d6\u7528\u6237id\u4e3a 20 \u7684\u7528\u6237\u662f\u5426\u5728 20220514 \u8fd9\u5929\u767b\u5f55\u8fc7\uff0c\u56e0\u4e3a offset 20 \u6839\u672c\u5c31\u4e0d\u5b58\u5728\uff0c\u6240\u4ee5\u8fd4\u56de\u7ed3\u679c\u4e5f\u662f 0\uff1a<\/p>\n<pre>127.0.0.1:6379&gt; getbit login:20220514 20\n(integer) 1<\/pre>\n<h3>3.3 BITCOUNT<\/h3>\n<p>\u6700\u65e9\u53ef\u7528\u7248\u672c\uff1a2.6.0\u3002\u65f6\u95f4\u590d\u6742\u5ea6\uff1aO(N)\u3002<\/p>\n<p>\u8bed\u6cd5\u683c\u5f0f\uff1a<\/p>\n<pre>BITCOUNT key [ start end [ BYTE | BIT]]<\/pre>\n<p>\u7528\u6765\u8ba1\u7b97\u6307\u5b9a key \u5bf9\u5e94\u5b57\u7b26\u4e32\u4e2d\uff0c\u88ab\u8bbe\u7f6e\u4e3a 1 \u7684 bit \u4f4d\u7684\u6570\u91cf\u3002\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u5b57\u7b26\u4e32\u4e2d\u6240\u6709 bit \u4f4d\u90fd\u4f1a\u53c2\u4e0e\u8ba1\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 start \u6216 end \u53c2\u6570\u6765\u6307\u5b9a\u4e00\u5b9a\u8303\u56f4\u5185\u88ab\u8bbe\u7f6e\u4e3a 1 \u7684 bit \u4f4d\u7684\u6570\u91cf\u3002start \u548c end \u53c2\u6570\u7684\u8bbe\u7f6e\u548c GETRANGE \u547d\u4ee4\u7c7b\u4f3c\uff0c\u90fd\u53ef\u4ee5\u4f7f\u7528\u8d1f\u6570\uff1a\u6bd4\u5982 -1 \u8868\u793a\u6700\u540e\u4e00\u4e2a\u4f4d\uff0c\u800c -2 \u8868\u793a\u5012\u6570\u7b2c\u4e8c\u4e2a\u4f4d\u7b49\u3002<\/p>\n<p>\u4ece Redis 7.0.0 \u5f00\u59cb\u652f\u6301 BYTE \u6216\u8005 BIT \u9009\u9879<\/p>\n<p>\u4e0b\u9762\u8ba1\u7b97 20220514 \u8fd9\u5929\u6240\u6709\u767b\u5f55\u7528\u6237\u6570\u91cf\uff1a<\/p>\n<pre>127.0.0.1:6379&gt; bitcount login:20220514\n(integer) 5<\/pre>\n<h3>3.4 BITOP<\/h3>\n<p>\u6700\u65e9\u53ef\u7528\u7248\u672c\uff1a2.6.0\u3002\u65f6\u95f4\u590d\u6742\u5ea6\uff1aO(N)\u3002<\/p>\n<p>\u8bed\u6cd5\u683c\u5f0f\uff1a<\/p>\n<pre>BITOP operation destkey key [key ...]<\/pre>\n<p>BITOP \u662f\u4e00\u4e2a\u590d\u5408\u64cd\u4f5c\uff0c\u652f\u6301\u5728\u591a\u4e2a key \u4e4b\u95f4\u6267\u884c\u6309\u4f4d\u8fd0\u7b97\u5e76\u5c06\u7ed3\u679c\u5b58\u50a8\u5728 destkey \u6307\u5b9a\u7684 key \u4e2d\u3002BITOP \u547d\u4ee4\u652f\u6301\u56db\u79cd\u6309\u4f4d\u8fd0\u7b97\uff1aAND(\u4ea4\u96c6)\u3001OR(\u5e76\u96c6)\u3001XOR(\u5f02\u6216) \u548c NOT(\u975e)\uff1a<\/p>\n<pre>BITOP AND destkey srckey1 srckey2 srckey3 ... srckeyN\nBITOP OR destkey srckey1 srckey2 srckey3 ... srckeyN\nBITOP XOR destkey srckey1 srckey2 srckey3 ... srckeyN\nBITOP NOT destkey srckey<\/pre>\n<p>\u5982\u4e0a\u6240\u89c1\uff0cNOT \u5f88\u7279\u6b8a\uff0c\u56e0\u4e3a\u5b83\u53ea\u9700\u8981\u4e00\u4e2a\u8f93\u5165 key\uff0c\u56e0\u4e3a\u5b83\u6267\u884c\u4f4d\u53cd\u8f6c\uff0c\u56e0\u6b64\u5b83\u4ec5\u4f5c\u4e3a\u4e00\u5143\u8fd0\u7b97\u7b26\u624d\u6709\u610f\u4e49\u3002<\/p>\n<p>\u5047\u8bbe 20220513 \u767b\u5f55 App \u7684\u7528\u6237id\u4e3a 1\u30013\u30015\u30017\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728957663f968684af1d.png\" class=\"aligncenter\"><\/p>\n<p>\u5982\u679c\u60f3\u7b97\u51fa 20220513 \u548c 20220514 \u4e24\u5929\u90fd\u767b\u5f55\u8fc7\u7684\u7528\u6237\u6570\u91cf\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728957663f96868d3189.png\" class=\"aligncenter\"><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528 AND \u6c42\u4ea4\u96c6\uff0c\u5177\u4f53\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n<pre>127.0.0.1:6379&gt; bitop and login:20220513:and:20220514 login:20220513 login:20220514\n(integer) 2\n127.0.0.1:6379&gt; bitcount login:20220513:and:20220514\n(integer) 2\n127.0.0.1:6379&gt; getbit login:20220513:and:20220514 1\n(integer) 1\n127.0.0.1:6379&gt; getbit login:20220513:and:20220514 5\n(integer) 1<\/pre>\n<p>\u5982\u679c\u60f3\u7b97\u51fa 20220513 \u548c 20220514 \u4efb\u610f\u4e00\u5929\u767b\u5f55\u8fc7 App \u7684\u7528\u6237\u6570\u91cf\uff1a<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728957763f9686933a3a.png\" class=\"aligncenter\"><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528 OR \u6c42\u5e76\u96c6\uff0c\u5177\u4f53\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n<pre>127.0.0.1:6379&gt; bitop or login:20220513:or:20220514 login:20220513 login:20220514\n(integer) 2\n127.0.0.1:6379&gt; bitcount login:20220513:or:20220514\n(integer) 7\n127.0.0.1:6379&gt; getbit login:20220513:or:20220514 0\n(integer) 1\n127.0.0.1:6379&gt; getbit login:20220513:or:20220514 1\n(integer) 1<\/pre>\n<h3>3.5 BITPOS<\/h3>\n<p>\u6700\u65e9\u53ef\u7528\u7248\u672c\uff1a2.8.7\u3002\u65f6\u95f4\u590d\u6742\u5ea6\uff1aO(N)\u3002<\/p>\n<p>\u8bed\u6cd5\u683c\u5f0f\uff1a<\/p>\n<pre>BITPOS key bit [ start [ end [ BYTE | BIT]]]<\/pre>\n<p>\u7528\u6765\u8ba1\u7b97\u6307\u5b9a key \u5bf9\u5e94\u5b57\u7b26\u4e32\u4e2d\uff0c\u7b2c\u4e00\u4f4d\u4e3a 1 \u6216\u8005 0 \u7684 offset \u4f4d\u7f6e\u3002\u9664\u6b64\u4e4b\u5916\uff0cBITPOS \u4e5f\u6709\u4e24\u4e2a\u9009\u9879 start \u548c end\uff0c\u8ddf BITCOUNT \u4e00\u6837\u3002<\/p>\n<p>BYTE\u3001BIT \u8fd9\u4e24\u4e2a\u9009\u9879\u4ece 7.0.0 \u7248\u672c\u5f00\u59cb\u624d\u80fd\u4f7f\u7528\u3002<\/p>\n<p>\u4e0b\u9762\u8ba1\u7b97 20220514 \u767b\u5f55 App \u7684\u6700\u5c0f\u7528\u6237id\uff1a<\/p>\n<pre>127.0.0.1:6379&gt; bitpos login:20220513 1\n(integer) 1<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Redis\u4f7f\u7528Bitmap\u7684\u65b9\u6cd5&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201594","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201594","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=201594"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201594\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201594"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201594"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201594"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}