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更新 redis集群技术.md

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wxin 2024-08-14 21:30:29 +08:00
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redis集群技术.md
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@ -81,7 +81,7 @@ Out[15]: b'bar'
主从同步的机制：
<img src="https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/6.png?Expires=1723640610&OSSAccessKeyId=TMP.3KfeJz2GfydC5m533sXWc3x8M2AoBTEmroU3YwdYX4zeccmetAxNCv2ZYhrhNTFVWP6fUHFL3tEbZ2xPoj72x22vyq3ANJ&Signature=V3P0b1AU%2B8bSpqaS8gRDTELs5mI%3D" alt="image-20230526094614286" style="zoom:50%;" />
<img src="https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/6.png" alt="image-20230526094614286" style="zoom:50%;" />
​ 从服务器向主服务器发送 SYNC 命令
@ -97,11 +97,11 @@ Out[15]: b'bar'
​ 命令传播是一个持续的过程：只要复制仍在继续，命令传播就会一直进行，使得主从服务器的状态可以一直保持一致
![image-20230228220953326](https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/7.png?Expires=1723640462&OSSAccessKeyId=TMP.3KfeJz2GfydC5m533sXWc3x8M2AoBTEmroU3YwdYX4zeccmetAxNCv2ZYhrhNTFVWP6fUHFL3tEbZ2xPoj72x22vyq3ANJ&Signature=sVi%2BDrswiyckwFpBeY5kSlzczzk%3D)
![image-20230228220953326](https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/7.png)
#### 4.Redis复制一致性问题
![image-20230228221045012](https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/8.png?Expires=1723640475&OSSAccessKeyId=TMP.3KfeJz2GfydC5m533sXWc3x8M2AoBTEmroU3YwdYX4zeccmetAxNCv2ZYhrhNTFVWP6fUHFL3tEbZ2xPoj72x22vyq3ANJ&Signature=Rr8mKRyqUuD4YgLNkNquRsg2W%2BY%3D)
![image-20230228221045012](https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/8.png)
​ 在读写分离环境下，客户端向主服务器发送写命令 SET n 10086，主服务器在执行这个写命令之后，向客户端返回回复，并将这个写命令传播给从服务器
@ -419,7 +419,7 @@ Warning: Using a password with '-a' or '-u' option on the command line interface
​ Sentinel 是一个监视器，它可以根据被监视实例的身份和状态来判断应该执行何种动作
<img src="https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/9.png?Expires=1723640495&OSSAccessKeyId=TMP.3KfeJz2GfydC5m533sXWc3x8M2AoBTEmroU3YwdYX4zeccmetAxNCv2ZYhrhNTFVWP6fUHFL3tEbZ2xPoj72x22vyq3ANJ&Signature=24R2ysKzJP9xs05vBHHzgYbhsyo%3D" alt="image-20230526150237928" style="zoom:50%;" />
<img src="https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/9.png" alt="image-20230526150237928" style="zoom:50%;" />
#### 1.Redis Sentinel 功能
@ -445,7 +445,7 @@ Warning: Using a password with '-a' or '-u' option on the command line interface
​ 由一个或多个Sentinel实例组成的Sentinel系统可以监视任意多个主服务器，以及所有从服务器，并在被监视的主服务器进入下线状态时，自动将下线主服务器属下的某个从服务器升级为新的主服务器，然后由新的主服务器代替已下线的主服务器继续处理命令请求
<img src="https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/10.png?Expires=1723640510&OSSAccessKeyId=TMP.3KfeJz2GfydC5m533sXWc3x8M2AoBTEmroU3YwdYX4zeccmetAxNCv2ZYhrhNTFVWP6fUHFL3tEbZ2xPoj72x22vyq3ANJ&Signature=9AMtkpI4DXmROdYPv67LOliVP%2BE%3D" alt="image-20230228223209112" style="zoom:50%;" />
<img src="https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/10.png" alt="image-20230228223209112" style="zoom:50%;" />
​ Sentinel负责监控集群中的所有主、从Redis，当发现主故障时，Sentinel会在所有的从中选一个成为新的主。并且会把其余的从变为新主的从。同时那台有问题的旧主也会变为新主的从，也就是说当旧的主即使恢复时，并不会恢复原来的主身份，而是作为新主的一个从
@ -457,7 +457,7 @@ Warning: Using a password with '-a' or '-u' option on the command line interface
​ Sentinel 通过用户给定的配置文件来发现主服务器
<img src="https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/11.png?Expires=1723640521&OSSAccessKeyId=TMP.3KfeJz2GfydC5m533sXWc3x8M2AoBTEmroU3YwdYX4zeccmetAxNCv2ZYhrhNTFVWP6fUHFL3tEbZ2xPoj72x22vyq3ANJ&Signature=%2B0j77v9FHU7o4v%2F37Ri8EkUvkZI%3D" alt="image-20230228223309007" style="zoom:33%;" />
<img src="https://oss-wxin-resource.oss-cn-beijing.aliyuncs.com/%E5%9B%BE%E7%89%87/Redis/11.png" alt="image-20230228223309007" style="zoom:33%;" />
​ Sentinel 会与被监视的主服务器创建两个网络连接