转自http://blog.youkuaiyun.com/hengyunabc/article/details/19025973
前言
数据在分片时,典型的是分库分表,就有一个全局ID生成的问题。单纯的生成全局ID并不是什么难题,但是生成的ID通常要满足分片的一些要求:
- 不能有单点故障。
- 以时间为序,或者ID里包含时间。这样一是可以少一个索引,二是冷热数据容易分离。
- 可以控制ShardingId。比如某一个用户的文章要放在同一个分片内,这样查询效率高,修改也容易。
- 不要太长,最好64bit。使用long比较好操作,如果是96bit,那就要各种移位相当的不方便,还有可能有些组件不能支持这么大的ID。
先来看看老外的做法,以时间顺序:
flickr
flickr巧妙地使用了mysql的自增ID,及replace into语法,十分简洁地实现了分片ID生成功能。
首先,创建一个表:
- CREATE TABLE `Tickets64` (
- `id` bigint(20) unsigned NOT NULL auto_increment,
- `stub` char(1) NOT NULL default '',
- PRIMARY KEY (`id`),
- UNIQUE KEY `stub` (`stub`)
- ) ENGINE=MyISAM
使用上面的sql可以得到一个ID:
- REPLACE INTO Tickets64 (stub) VALUES ('a');
- SELECT LAST_INSERT_ID();
- +-------------------+------+
- | id | stub |
- +-------------------+------+
- | 72157623227190423 | a |
- +-------------------+------+
很简单,利用mysql的自增ID即可。比如有两台ID生成服务器,设置成下面即可:
- TicketServer1:
- auto-increment-increment = 2
- auto-increment-offset = 1
- TicketServer2:
- auto-increment-increment = 2
- auto-increment-offset = 2
简单可靠。
缺点:
ID只是一个ID,没有带入时间,shardingId等信息。
twitter利用zookeeper实现了一个全局ID生成的服务snowflake,https://github.com/twitter/snowflake,可以生成全局唯一的64bit ID。
生成的ID的构成:
- 时间--用前面41 bit来表示时间,精确到毫秒,可以表示69年的数据
- 机器ID--用10 bit来表示,也就是说可以部署1024台机器
- 序列数--用12 bit来表示,意味着每台机器,每毫秒最多可以生成4096个ID
充分把信息保存到ID里。
缺点:
结构略复杂,要依赖zookeeper。
分片ID不能灵活生成。
instagram参考了flickr的方案,再结合twitter的经验,利用Postgres数据库的特性,实现了一个更简单可靠的ID生成服务。
instagram是这样设计它们的ID的:
- 使用41 bit来存放时间,精确到毫秒,可以使用41年。
- 使用13 bit来存放逻辑分片ID。
- 使用10 bit来存放自增长ID,意味着每台机器,每毫秒最多可以生成1024个ID
假定时间是September 9th, 2011, at 5:00pm,则毫秒数是1387263000(直接使用系统得到的从1970年开始的毫秒数)。那么先把时间数据放到ID里:
id = 1387263000 << (64-41)
再把分片ID放到时间里,假定用户ID是31341,有2000个逻辑分片,则分片ID是31341 % 2000 -> 1341:
id |= 1341 << (64-41-13)
最后,把自增序列放ID里,假定前一个序列是5000,则新的序列是5001:
id |= (5001 % 1024)
这样就得到了一个全局的分片ID。
下面列出instagram使用的Postgres schema的sql:
- REATE OR REPLACE FUNCTION insta5.next_id(OUT result bigint) AS $$
- DECLARE
- our_epoch bigint := 1314220021721;
- seq_id bigint;
- now_millis bigint;
- shard_id int := 5;
- BEGIN
- SELECT nextval('insta5.table_id_seq') %% 1024 INTO seq_id;
- SELECT FLOOR(EXTRACT(EPOCH FROM clock_timestamp()) * 1000) INTO now_millis;
- result := (now_millis - our_epoch) << 23;
- result := result | (shard_id << 10);
- result := result | (seq_id);
- END;
- $$ LANGUAGE PLPGSQL;
- CREATE TABLE insta5.our_table (
- "id" bigint NOT NULL DEFAULT insta5.next_id(),
- ...rest of table schema...
- )
缺点:
貌似真的没啥缺点。
优点:
充分把信息保存到ID里。
充分利用数据库自身的机制,程序完全不用额外处理,直接插入到对应的分片的表即可。
Redis实现分片的分局ID
项目地址
https://github.com/hengyunabc/redis-id-generator
基于redis的分布式ID生成器。
准备
首先,要知道redis的EVAL,EVALSHA命令:
http://redis.readthedocs.org/en/latest/script/eval.html
http://redis.readthedocs.org/en/latest/script/evalsha.html
原理
利用redis的lua脚本执行功能,在每个节点上通过lua脚本生成唯一ID。
生成的ID是64位的:
- 使用41 bit来存放时间,精确到毫秒,可以使用41年。
- 使用12 bit来存放逻辑分片ID,最大分片ID是4095
- 使用10 bit来存放自增长ID,意味着每个节点,每毫秒最多可以生成1024个ID
比如GTM时间 Fri Mar 13 10:00:00 CST 2015
,它的距1970年的毫秒数是 1426212000000
,假定分片ID是53,自增长序列是4,则生成的ID是:
<code class="hljs fix has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-attribute" style="box-sizing: border-box;">5981966696448054276 </span>=<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;"> 1426212000000 << 22 + 53 << 10 + 4</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
redis提供了TIME命令,可以取得redis服务器上的秒数和微秒数。因些lua脚本返回的是一个四元组。
<code class="hljs livecodeserver has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">second</span>, microSecond, partition, seq</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
客户端要自己处理,生成最终ID。
<code class="hljs lisp has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-list" style="box-sizing: border-box;">(<span class="hljs-list" style="box-sizing: border-box;">(<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">second</span> <span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">* 1000 + microSecond / 1000) << (12 + 10)) + (shardId << 10) + seq;</span></span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
集群实现原理
假定集群里有3个节点,则节点1返回的seq是:
<code class="hljs r has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">3</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">9</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">12</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">...</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
节点2返回的seq是
<code class="hljs r has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">7</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">10</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">13</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">...</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
节点3返回的seq是
<code class="hljs r has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">8</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">11</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">14</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">...</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
这样每个节点返回的数据都是唯一的。
单个节点部署
下载redis-script-node1.lua,并把它load到redis上。
<code class="language-bash hljs has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">cd</span> redis-directory/ wget https://raw.githubusercontent.com/hengyunabc/redis-id-generator/master/redis-script-node1.lua ./redis-cli script load <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">$(cat redis-script-node1.lua)</span>"</span> </code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li></ul>
获取lua脚本的sha1值,可能是:
<code class="hljs bash has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">fce3758b2e0af6cbf8fea4d42b379<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">cd</span>0dc374418</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
在代码里,通过EVALSHA命令,传递这个sha1值,就可以得到生成的ID。
比如,通过命令行执行:
<code class="language-bash hljs has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">./redis-cli EVALSHA fce3758b2e0af6cbf8fea4d42b379<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">cd</span>0dc374418 <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span> test <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">123456789</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
结果可能是:
<code class="hljs livecodeserver has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span>) (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">integer</span>) <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1426238286</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>) (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">integer</span>) <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">130532</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">3</span>) (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">integer</span>) <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">277</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>) (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">integer</span>) <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul>
集群部署
假定集群是3个节点,则分别对三个节点执行:
<code class="language-bash hljs has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">./redis-cli -host node1 -p <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6379</span> script load <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">$(cat redis-script-node1.lua)</span>"</span> ./redis-cli -host node2 -p <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">7379</span> script load <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">$(cat redis-script-node2.lua)</span>"</span> ./redis-cli -host node3 -p <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">8379</span> script load <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">$(cat redis-script-node3.lua)</span>"</span> </code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li></ul>
性能
redis默认配置。
<code class="hljs css has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">单节点,单线程: <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">time</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:0</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:00</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:00</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.959</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">speed</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:10427</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.52867570386</span> 单节点,20线程: <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">time</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:0</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:00</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:06</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.710</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">speed</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:29806</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.259314456034</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li></ul>
结论:
- 单节点,qps约3w
- 可以线性扩展,3个结点足以满足绝大部分的应用
java客户端封装
在redis-id-generator-java目录下,有example和benchmark代码。
在调用时,要传入两个参数
- tag,即为哪一类服务生成ID
- shardId,即分片由哪个ID生成,比如一个用户的订单,则分片ID应该由userId来生成
<code class="language-java hljs has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">class</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Example</span> {</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">main</span>(String[] args) { String tab = <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"order"</span>; <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">long</span> userId = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">123456789</span>; IdGenerator idGenerator = IdGenerator.builder() .addHost(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"127.0.0.1"</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6379</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"fce3758b2e0af6cbf8fea4d42b379cd0dc374418"</span>) <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// .addHost("127.0.0.1", 7379, "1abc55928f37176cb934fc7a65069bf32282d817")</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// .addHost("127.0.0.1", 8379, "b056d20feb3f89483b10c81027440cbf6920f74f")</span> .build(); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">long</span> id = idGenerator.next(tab, userId); System.out.println(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"id:"</span> + id); List<Long> result = IdGenerator.parseId(id); System.out.println(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"miliSeconds:"</span> + result.get(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>) + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">", partition:"</span> + result.get(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span>) + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">", seq:"</span> + result.get(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>)); } }</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li></ul>
多语言客户端
只要支持redis evalsha命令就可以了。