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Xargin 2018-07-09 23:16:10 +08:00
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ch6-cloud/ch6-07-dist-id.md
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@ -127,9 +127,9 @@ Epoch 就是本节开头讲的起始时间，NodeBits 指的是机器编号的
sonyflake 是 Sony 公司的一个开源项目，基本思路和 snowflake 差不多，不过位分配上稍有不同：
```
+--------------------------------------------------------------------------+
+-----------------------------------------------------------------------------+
| 1 Bit Unused | 39 Bit Timestamp | 8 Bit Sequence ID | 16 Bit Machine ID |
+--------------------------------------------------------------------------+
+-----------------------------------------------------------------------------+
```
这里的时间只用了 39 个 bit，但时间的单位变成了 10ms，所以理论上比 41 位表示的时间还要久(174 years)。