{"id":672,"date":"2021-01-13T14:39:49","date_gmt":"2021-01-13T06:39:49","guid":{"rendered":"http:\/\/blog.refusea.com\/?p=672"},"modified":"2021-01-13T14:39:49","modified_gmt":"2021-01-13T06:39:49","slug":"redis-%e5%86%85%e5%ad%98%e5%8d%a0%e7%94%a8%e4%bc%98%e5%8c%96%e5%ae%9e%e4%be%8b","status":"publish","type":"post","link":"https:\/\/refusea.com\/?p=672","title":{"rendered":"redis \u5185\u5b58\u5360\u7528\u4f18\u5316\u5b9e\u4f8b"},"content":{"rendered":"<h2>\u80cc\u666f<\/h2>\n<p>adx \u5728\u5904\u7406\u66dd\u5149\/\u70b9\u51fb\u4e0a\u62a5\u65f6\uff0c\u4f7f\u7528 redis \u7684 <code>setnx<\/code> \u547d\u4ee4\u53bb\u91cd\uff0c\u5176\u903b\u8f91\u5982\u4e0b<\/p>\n<ol>\n<li>\u6784\u9020\u4e00\u4e2a\u5f62\u5982 <code>s:track:%d:%s:%s<\/code> \u7684 key\uff0c\u53c2\u6570\u5206\u522b\u662f\u4e0a\u62a5\u7c7b\u578b(\u66dd\u5149 or \u70b9\u51fb)\uff0c\u8bf7\u6c42 id\uff0c\u5e7f\u544a\u4f4d id<\/li>\n<li><code>setnx(redisKey, timestamp)<\/code>\n<ol>\n<li>\u82e5\u8fd4\u56de\u503c\u4e0d\u4e3a 1\uff0c\u8bf4\u660e\u672c\u6b21\u4e0a\u62a5\u4e3a\u91cd\u590d\u4e0a\u62a5<\/li>\n<li>\u82e5\u8fd4\u56de\u503c\u4e3a 1\uff0c\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u4e3a 24 \u5c0f\u65f6<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<p>\u73b0\u5728\u7684\u9700\u6c42\u5c31\u662f\u51cf\u5c11\u6b64\u9879\u53bb\u91cd\u4e1a\u52a1\u6240\u5360\u7528\u7684 redis \u5185\u5b58<\/p>\n<h2>\u6280\u672f\u65b9\u6848<\/h2>\n<h3>\u65b9\u6848\u4e00<\/h3>\n<ol>\n<li>value \u7f6e\u4e3a 0\uff0c\u8fd9\u6837\u6bcf\u4e2a key \u8282\u7ea6\u4e86 8 \u5b57\u8282<br \/>\n\u8bf4\u660e\uff1a\u867d\u7136\u65f6\u95f4\u6233\u662f 10 \u4f4d\u6570\u5b57\uff0c\u4f46 redis \u4f1a\u4ee5 8 \u5b57\u8282\u6574\u6570\u5f62\u5f0f\u8fdb\u884c\u5b58\u50a8\uff1b\u800c 0 \u5728 redis \u5185\u90e8\u662f\u5171\u4eab\u7684\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u5355\u4f8b\u6a21\u5f0f<\/li>\n<li>\u7b80\u5316 key\uff0c\u76ee\u524d key \u7684\u524d\u7f00\u592a\u957f\uff0c\u53ef\u4ee5\u7b80\u5316\u4e3a <code>te\/tc<\/code>\uff0c\u8868\u793a\u66dd\u5149\/\u70b9\u51fb\u4e0a\u62a5<\/li>\n<li>\u7528\u5e7f\u544a\u5e8f\u53f7\u6765\u6784\u9020 key\uff0c\u800c\u4e0d\u662f\u7528\u5e7f\u544a\u4f4d id \u6784\u9020 key\uff0c\u8fd9\u6837\u8fd8\u80fd\u517c\u5bb9\u4e00\u4e2a\u5e7f\u544a\u4f4d\u586b\u5145\u591a\u4e2a\u5e7f\u544a\u7684\u60c5\u51b5<\/li>\n<li>\u7f29\u77ed\u8fc7\u671f\u65f6\u95f4<\/li>\n<\/ol>\n<h3>\u65b9\u6848\u4e8c<\/h3>\n<p>\u4e00\u6b21\u5e7f\u544a\u8bf7\u6c42\uff0c\u5b9e\u9645\u4e0a\u4f1a\u5bfc\u81f4\u591a\u6b21\u5e7f\u544a\u4e0a\u62a5<\/p>\n<ol>\n<li>\u53ef\u80fd\u8fd4\u56de\u4e86\u591a\u4e2a\u5e7f\u544a<\/li>\n<li>\u4e00\u4e2a\u5e7f\u544a\u53ef\u80fd\u4e0a\u62a5\u66dd\u5149\u548c\u70b9\u51fb<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e00\u6b21\u4e0b\u53d1\u4e86 10 \u4e2a\u5e7f\u544a\uff0c\u6bcf\u4e2a\u5e7f\u544a\u90fd\u4e0a\u62a5\u4e86\u66dd\u5149\u548c\u70b9\u51fb\uff0c\u5219\u8981\u5728 redis \u91cc\u521b\u5efa 20 \u4e2a key\uff0c\u8fd9 20 \u4e2a key \u7684\u8bf7\u6c42 id \u662f\u5b8c\u5168\u4e00\u6837\u7684<\/p>\n<p>\u8fd9\u79cd\u60c5\u51b5\u53ef\u4ee5\u7528 <code>hash<\/code> \u6765\u8282\u7ea6\u5185\u5b58<\/p>\n<ul>\n<li>\u4f7f\u7528\u8bf7\u6c42 id \u505a key<\/li>\n<li>\u4e0a\u62a5\u7c7b\u578b+\u5e7f\u544a\u5e8f\u53f7 \u505a field<\/li>\n<\/ul>\n<pre><code>hsetnx t:1ad72e9d0171ac12041c271000000000 e99 0<\/code><\/pre>\n<h3>\u65b9\u6848\u4e09<\/h3>\n<p>\u6211\u4eec\u6765\u8003\u5bdf\u4e00\u4e0b redis \u7684 set\uff0c\u901a\u8fc7 <code>sadd key member<\/code> \u65b9\u6cd5\u53ef\u4ee5\u5f80\u4e00\u4e2a\u96c6\u5408\u91cc\u6dfb\u52a0\u5143\u7d20\uff0c\u5982\u679c\u6dfb\u52a0\u6210\u529f\uff0c\u8fd4\u56de 1\uff0c\u6dfb\u52a0\u4e0d\u6210\u529f\uff0c\u8bf4\u660e\u5143\u7d20\u5df2\u5b58\u5728\uff0c\u8fd4\u56de 0\u3002\u53ef\u89c1\uff0cset \u4e5f\u53ef\u4ee5\u7528\u6765\u505a\u53bb\u91cd<br \/>\n\u5f53 set \u5143\u7d20\u4e0d\u591a\u4e14\u5143\u7d20\u503c\u4e3a\u6574\u6570\u65f6\uff0credis \u4f1a\u4f7f\u7528 <code>intset<\/code> \u6765\u5b9e\u73b0 set\uff1b\u5426\u5219\u4f7f\u7528 <code>hashtable<\/code><\/p>\n<p>\u65b9\u6848\u4e8c\u4f7f\u7528 <code>hash<\/code> \u7ed3\u6784\uff0c<code>field<\/code> \u662f <code>e\/c<\/code> \u62fc\u63a5\u5e7f\u544a\u5e8f\u53f7\uff1b\u6539\u9020\u6210\u6574\u6570\u7684\u8bdd\uff0c\u66dd\u5149\u53ef\u4ee5\u7528 <code>2*\u5e8f\u53f7<\/code>\uff0c\u70b9\u51fb\u53ef\u4ee5\u7528 <code>2*\u5e8f\u53f7+1<\/code>\uff0c\u4ece\u6027\u80fd\u8003\u8651\u4e5f\u53ef\u4ee5\u7528\u4f4d\u64cd\u4f5c<\/p>\n<p>\u4f8b\u5982\uff0c\u5e7f\u544a\u8bf7\u6c42 id = 0a80114e01717684281e000249ef\uff0c\u586b\u5145\u4e86 5 \u4e2a\u5e7f\u544a\uff0c\u5168\u90e8\u66dd\u5149\uff0c\u7b2c\u4e00\u4e2a\u5e7f\u544a\u70b9\u51fb\uff0c\u5219\u6709\u5982\u4e0b\u64cd\u4f5c<\/p>\n<pre><code class=\"language-java\">String reqid = &quot;0a80114e01717684281e000249ef&quot;;\nint member;\n\/\/ \u7b2c\u4e00\u4e2a\u5e7f\u544a\u66dd\u5149\nmember = 0 * 2;\nif (sadd(reqid, member) == 1) \/\/ \u66dd\u5149\u672a\u91cd\u590d;\n  do something...\n\/\/ \u7b2c\u4e00\u4e2a\u5e7f\u544a\u70b9\u51fb\nmember = 0 * 2 + 1;\nif (sadd(reqid, member) == 1) \/\/ \u70b9\u51fb\u672a\u91cd\u590d;\n  do something...\n\/\/ \u7b2c\u4e8c\u4e2a\u5e7f\u544a\u66dd\u5149\nmember = 1 * 2;\nif (sadd(reqid, member) == 1) \/\/ \u66dd\u5149\u672a\u91cd\u590d;\n  do something...\n\n......<\/code><\/pre>\n<p>\u4ed4\u7ec6\u7814\u7a76 <code>intset<\/code>\uff0c\u53ef\u4ee5\u53d1\u73b0\u548c\u6211\u4eec\u7684\u4e1a\u52a1\u9700\u6c42\u975e\u5e38\u7684\u5339\u914d<\/p>\n<ol>\n<li>\u5f53\u96c6\u5408\u5143\u7d20\u5168\u90e8\u662f\u6574\u6570\uff0c\u4e14\u6570\u91cf\u5c11\u4e8e <code>512<\/code>\uff08\u53ef\u901a\u8fc7 <code>set-max-intset-entries<\/code> \u914d\u7f6e\uff09 \u4e2a\uff0credis \u4f7f\u7528 <code>intset<\/code> \u800c\u4e0d\u662f <code>hashtable<\/code> \u6765\u5b9e\u73b0 set<\/li>\n<li><code>intset<\/code> \u4fdd\u5b58\u7684\u6574\u6570\u53ef\u4ee5\u662f 2 \u5b57\u8282\uff0c4 \u5b57\u8282\u6216\u8005 8 \u5b57\u8282\uff0c\u800c\u6211\u4eec\u7684\u5e7f\u544a\u4e1a\u52a1\u4e0b\u53d1\u7684\u5e7f\u544a\u6570\u91cf\u80af\u5b9a\u4e0d\u4f1a\u8d85\u8fc7 <code>65535<\/code> \u4e2a\uff0c\u4e5f\u5c31\u662f\u8bf4\u5728 redis \u91cc\u4fdd\u5b58\u5e7f\u544a\u5e8f\u53f7\u53ea\u9700\u8981\u7528 2 \u5b57\u8282\u7684\u6574\u6570<\/li>\n<li><code>intset<\/code> \u5224\u65ad\u5143\u7d20\u662f\u5426\u5b58\u5728\u4f7f\u7528\u4e8c\u5206\u67e5\u627e\u6cd5\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u662f <code>O(logn)<\/code>\uff0c<code>hashtable<\/code> \u7684\u65f6\u95f4\u590d\u6742\u5ea6\u57fa\u672c\u662f <code>O(1)<\/code>\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c<code>intset<\/code> \u867d\u7136\u5185\u5b58\u6d88\u8017\u4f4e\uff0c\u4f46\u662f\u54cd\u5e94\u4f1a\u6162\u4e00\u70b9\uff0c\u5bf9\u4e8e\u6211\u4eec\u7684\u4e1a\u52a1\u6765\u8bf4\uff0c\u4e00\u4e2a set \u91cc\u7684\u5143\u7d20\u5e73\u5747\u53ea\u6709 3-5 \u4e2a\uff0c\u7528\u4e8c\u5206\u67e5\u627e\u7684\u6027\u80fd\u5b8c\u5168\u53ef\u4ee5\u63a5\u53d7<\/li>\n<li>\u5373\u4fbf\u662f\u5bf9\u4e8e\u4e00\u4e9b\u586b\u5145\u4e86\u51e0\u5341\u4e2a\u521b\u610f\u7684\u5e7f\u544a\u8bf7\u6c42\uff0c\u5224\u65ad\u66dd\u5149\/\u70b9\u51fb\u662f\u5426\u91cd\u590d\u53ef\u80fd\u4f1a\u6162\u70b9\uff0c\u4f46\u662f\u6211\u4eec\u8fd9\u4e2a\u64cd\u4f5c\u672c\u8eab\u5c31\u662f\u5f02\u6b65\u7684\uff0c\u6162\u4e00\u70b9\u53ef\u4ee5\u63a5\u53d7<\/li>\n<\/ol>\n<h3>\u65b9\u6848\u56db<\/h3>\n<p>\u65e0\u8bba\u662f\u4f7f\u7528 hash \u8fd8\u662f set \uff0c\u90fd\u57fa\u4e8e\u4e00\u4e2a\u524d\u63d0\uff1a\u8ba4\u4e3a\u4e00\u6b21\u5e7f\u544a\u8bf7\u6c42\u4f1a\u4ea7\u751f\u591a\u6b21\u4e0a\u62a5\uff1b\u4f46\u8fd9\u4e2a\u524d\u63d0\u5e76\u975e\u7edd\u5bf9\uff0c\u5f88\u591a\u60c5\u51b5\u662f\u4e00\u6b21\u8bf7\u6c42\u53ea\u8fd4\u56de\u4e86\u4e00\u4e2a\u5e7f\u544a\uff0c\u6700\u7ec8\u53ea\u89e6\u53d1\u4e86\u66dd\u5149\uff0c\u6ca1\u6709\u89e6\u53d1\u70b9\u51fb\uff0c\u8fd9\u79cd\u60c5\u51b5\u4f7f\u7528 hash\/set \u662f\u4e0d\u662f\u53cd\u800c\u6d88\u8017\u4e86\u66f4\u591a\u5185\u5b58\u5462\uff1f<\/p>\n<p>\u6700\u7b80\u5355\u7684\u505a\u6cd5\u662f\uff0c\u5982\u679c\u672c\u6b21\u5e7f\u544a\u8bf7\u6c42\u53ea\u8fd4\u56de\u4e86\u4e00\u4e2a\u5e7f\u544a\uff0c\u6211\u4eec\u4f7f\u7528 <code>setnx<\/code> \u6765\u8bbe\u7f6e\u4e00\u4e2a key\u2014\u2014\u8f6c\u4e86\u4e00\u5708\u56de\u5230\u539f\u70b9\u4e86\u5417\uff1f\u5982\u679c\u53c8\u53d1\u751f\u4e86\u70b9\u51fb\u8be5\u600e\u4e48\u529e\uff1f<\/p>\n<p>\u5bf9\u4e8e\u8fd9\u79cd\u60c5\u51b5\uff0c\u6709\u6ca1\u6709\u4ec0\u4e48\u66f4\u597d\u7684\u65b9\u6848\u5462\uff1f\u6709\u6ca1\u6709\u4e00\u79cd\u65b9\u6848\uff0c\u53ef\u4ee5\u7528\u4e00\u4e2a value \u6765\u8868\u793a\u591a\u4e2a\u5e7f\u544a\u662f\u5426\u66dd\u5149\/\u70b9\u51fb\u8fc7\uff1f<\/p>\n<p>\u7ecf\u8fc7\u7814\u7a76\uff0c\u4f4d\u56fe\u4f3c\u4e4e\u662f\u4e2a\u4e0d\u9519\u7684\u65b9\u6848<\/p>\n<ul>\n<li>\u82e5\u5e7f\u544a\u5e8f\u53f7=n\uff0c\u4e00\u5171\u586b\u5145\u4e86 t \u4e2a\u5e7f\u544a\uff0c\u90a3\u4e48\u4f4d\u56fe\u7684\u7b2c n \u4f4d\u8868\u793a\u5e7f\u544a\u662f\u5426\u66dd\u5149\uff0c\u7b2c t + n \u4f4d\u8868\u793a\u5e7f\u544a\u662f\u5426\u70b9\u51fb<\/li>\n<\/ul>\n<p>\u4f8b\u5982: \u672c\u6b21\u4e0b\u53d1\u4e86 10 \u4e2a\u5e7f\u544a\uff0c\u5f53\u524d\u66dd\u5149\u7684\u5e7f\u544a\u5e8f\u53f7\u4e3a 2\uff0c\u8981\u5224\u65ad\u8be5\u5e7f\u544a\u662f\u5426\u66dd\u5149\u8fc7<\/p>\n<pre><code class=\"language-java\">\/\/ \u7b2c\u4e09\u4e2a\u5e7f\u544a\u66dd\u5149\uff0c\u5e7f\u544a\u5e8f\u53f7\u4e3a 2\nint offset = 2;\nboolean result = setbit(key, offset, true);\nif (result) {\n  \/\/ \u91cd\u590d\u66dd\u5149\n} else {\n  \/\/ \u9996\u6b21\u66dd\u5149\n}<\/code><\/pre>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u964d\u4f4e redis \u5185\u5b58\u5360\u7528\u7684\u65b9\u6cd5<\/p>\n<ul>\n<li>\u51cf\u5c11 key \u7684\u6570\u91cf\n<ul>\n<li>\u63d0\u53d6\u51fa key \u91cc\u7684\u76f8\u540c\u6570\u636e\uff0c\u4f7f\u7528 hash \u6765\u6620\u5c04 key \u91cc\u7684\u4e0d\u540c\u6570\u636e<\/li>\n<li>\u8981\u7279\u522b\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c hash \u7684\u5b57\u6bb5\u5f88\u591a\uff0c\u5c31\u8981\u8003\u8651\u8d1f\u8f7d\u5747\u8861\u7684\u95ee\u9898\uff1a\u56e0\u4e3a\u6211\u4eec\u7684 redis \u73af\u5883\u662f\u5206\u5e03\u5f0f\u7684\uff0c\u5982\u679c\u4e2a\u522b hash \u7684\u5b57\u6bb5\u592a\u591a\uff0c\u4f1a\u5bfc\u81f4\u8d1f\u8f7d\u96c6\u4e2d\u5230\u627f\u8f7d\u8be5 hash \u7684\u670d\u52a1\u5668<\/li>\n<\/ul>\n<\/li>\n<li>\u964d\u4f4e key \u672c\u8eab\u7684\u5185\u5b58\u5360\u7528\n<ul>\n<li>key \u7684\u6784\u9020\u65b9\u5f0f\u662f\u5426\u5b58\u5728\u4f18\u5316\u7a7a\u95f4<\/li>\n<\/ul>\n<\/li>\n<li>\u964d\u4f4e value \u7684\u5185\u5b58\u5360\u7528\n<ul>\n<li>\u5982\u679c value \u7684\u503c\u6ca1\u6709\u5b9e\u9645\u610f\u4e49\uff0c\u5efa\u8bae\u5b58\u4e3a 0<\/li>\n<li>\u5408\u7406\u7684\u9009\u62e9\u6570\u636e\u7ed3\u6784<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u80cc\u666f adx \u5728\u5904\u7406\u66dd\u5149\/\u70b9\u51fb\u4e0a\u62a5\u65f6\uff0c\u4f7f\u7528 redis \u7684 setnx \u547d\u4ee4\u53bb\u91cd\uff0c\u5176\u903b\u8f91\u5982\u4e0b \u6784\u9020\u4e00\u4e2a\u5f62\u5982 s 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