

dedid/README.chs.md at master · dekuan/dedid · GitHub
source link: https://github.com/dekuan/dedid/blob/master/README.chs.md?
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.

dekuan/dedid
一种为分布式数据库而设计的全局唯一 ID(主键)生成器。 本算法的实现参考了 Twitter Snowflake,但是在最后的 12 位您不仅仅可以使用随机数字,也可以通过指定字符串来获取哈希值。
结构体概况
本算法使用一个 64 位的 int 值作为 ID 的载体。
0 xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx x xxxxxx xxxxxx xx xxxxxxxx
结构体说明
位置 | 长度 | 用途 | 备注 |
---|---|---|---|
0 | 1 | 保留位 | 一直都是 0 |
1~41 | 41 | 以毫秒为单位的流淌时间 | 0~69 年,即本 ID 算法最多可以使用 69 年 |
42~46 | 5 | 数据中心编号 | 编号范围 0~31,最多可容纳 32 个数据中心 |
47~51 | 5 | 数据中心下属数据节点编号 | 编号范围 0~31,每个数据中心最多可容纳 32 个数据节点。所以整个系统最多可容纳 1024 个数据节点 |
52~63 | 12 | 随机数/哈希值 | 取值范围 0~4095 |
数据中心编号
0 00000000 00000000 00000000 00000000 00000000 0 11111 00000 0000 00000000
00000000 00000000 00000000 00000000 00000000 00111110 00000000 00000000
00 00 00 00 00 3E 00 00
数据节点编号
0 00000000 00000000 00000000 00000000 00000000 0 00000 11111 0000 00000000
00000000 00000000 00000000 00000000 00000000 00000001 11110000 00000000
00 00 00 00 00 01 F0 00
0 11111111 11111111 11111111 11111111 11111111 1 00000 00000 0000 00000000
01111111 11111111 11111111 11111111 11111111 11000000 00000000 00000000
7F FF FF FF FF C0 00 00
随机数/哈希值
0 00000000 00000000 00000000 00000000 00000000 0 00000 00000 1111 11111111
00000000 00000000 00000000 00000000 00000000 00000000 00001111 11111111
00 00 00 00 00 00 0F FF
创建一个普通的随机数 ID
$cDId = CDId::getInstance();
$nCenter = 0;
$nNode = 1;
$arrD = [];
$nNewId = $cDId->createId( $nCenter, $nNode, null, $arrD );
echo "new id = " . $nNewId . "\r\n";
print_r( $arrD );
new id = 114654484990270790
Array
(
[center] => 0
[node] => 1
[time] => 27335759399
[rand] => 3398
)
指定字符串,创建一个带有哈希值的 ID
$cDId = CDId::getInstance();
$nCenter = 0;
$nNode = 15;
$sSrc = "dekuan";
$arrD = [];
$nNewId = $cDId->createId( $nCenter, $nNode, $sSrc, $arrD );
echo "new id = " . $nNewId . "\r\n";
print_r( $arrD );
new id = 114654631304370386
Array
(
[center] => 0
[node] => 1
[time] => 27335794283
[rand] => 2258
)
解析 ID 获取详细信息
$cDId = CDId::getInstance();
$arrId = $cDId->parseId( 114654631304370386 );
print_r( $arrId );
Array
(
[center] => 0
[node] => 1
[time] => 27335794283
[rand] => 2258
)
# composer require dekuan/dedid
了解更多信息,敬请访问 https://packagist.org/packages/dekuan/dedid
Recommend
-
234
35 lines (22 sloc) 746 Bytes speed-test Test your internet connection speed and ping using
-
228
A Vue.js project 效果预览: 源码地址:
-
197
gost - A Simple Tool of Go to help you manage GOPATHs and run Go commands.
-
151
Permalink master...
-
149
erpc-doc/README.md at master · andeya/erpc-doc · GitHub
-
174
-
109
mocha - ☕️ simple, flexible, fun javascript test framework for node.js & the browser
-
138
jsnes - A JavaScript NES emulator.
-
102
GitHub is where people build software. More than 27 million people use GitHub to discover, fork, and contribute to over 80 million projects.
-
95
GitHub is where people build software. More than 27 million people use GitHub to discover, fork, and contribute to over 80 million projects.
About Joyk
Aggregate valuable and interesting links.
Joyk means Joy of geeK