redistribution engine, cache machine & rebuild logic -优快云博客

本文链接：https://blog.youkuaiyun.com/sh_danny/article/details/6579195

本文探讨了RAID6架构中重建与数据再分配的原理。重点分析了元数据分配块、缓存块及缓存状态机操作间的互动关系，并深入研究了再分配引擎与缓存状态机在代码实现层面的具体作用。

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Two problems from Dave's Reply:

1). Reply of Auto Rebuild(offline to online):

I hope while you are doing this you are following the logic and the data structure manipulation in the code. It is very important, as a uServer guy, that you understand the working relationships between the metadata allocation block, the cache block(s) and the cache state machine operations as provided below. That is the heart of the RAID6 construction, rebuild and recovery operations.

2). Reply of Remove Redistribution:

I hope you are beginning to understand the complex interactions between the redistribution engine, the

cache state machine and the RAID rebuild logic as you go through these examples. It is important that you can related the actions below to the framework with the source code.

It seems that to be an eligible server guy, it is urgent and significant to understand all these!!!

GO ON NOW! Little by little!

Questions:

1. What does framework means? It may mean the architecture of the code.

Important things:

1. From the code, redist start in function "CSRedistControl()". I think this is part of the "redistribution engine".

msScheduler()-->checkForRedistributionWork()-->sendRedistControl()-->

MSmessageDispatch()-->CSReditControl()