[sheepdog] [PATCH 1/3] collie: add delay_recovery {start|stop} command

[Yunkai Zhang]

On Mon, Jul 30, 2012 at 4:24 PM, Liu Yuan <namei.unix at gmail.com> wrote:
> On 07/30/2012 04:17 PM, Yunkai Zhang wrote:
>> Can you show more information to me? it works well in my testing, and
>
> What kind of information? I just asked, if your patch set can work with
> following situation:
>
>   while you do the manual recovery (be it group join or group kill),
> some of other nodes fails unexpectedly, then what the result of it? For e.g
>   0 we have 3 nodes  with 2 copies (d0,d1,d2)
>   1 start manual group add, add node x1,x2
>   2 some nodes d1,d2 goes down meantime <-- no membership event
> propagate to cluster? If no, what do we handle the IO routed to failed
> nodes x1, x2?

Good question, in order to simplify these patchset, I'll let sheep continue
to process LEAVE event even if we have start delay recovery.

>   3 stop manual group add.
>
> the expected result is (d0, x1, x2), how is the epoch looks like? like
> follwoing?
>
>  epoch 1: (d0, d1, d2)
>  epoch 2: (d0, x1, x3)
>
> Thanks,
> Yuan



-- 
Yunkai Zhang
Work at Taobao