Re: clustered MD

Goldwyn Rodrigues
2015-06-14T22:19:42Z

On 06/12/2015 01:46 PM, David Teigland wrote:
> When a node fails, its dirty areas get special treatment from other nodes
> using the area_resyncing() function. Should the suspend_list be created
> before any reads or writes from the file system are processed by md? It
> seems to me that gfs journal recovery could read/write to dirty regions
> (from the failed node) before md was finished setting up the suspend_list.
> md could probably prevent that by using the recover_prep() dlm callback to
> set a flag that would block any i/o that arrived before the suspend_list
> was ready.
>
> .

Yes, we should call mddev_suspend() in recover_prep() and mddev_resume()
after suspend_list is created. Thanks for pointing it out.

--
Goldwyn