[sheepdog] sheepdog replica number question

[Liu Yuan]

On Mon, May 05, 2014 at 02:44:24PM +0800, Ruoyu wrote:
> I think the user wants to change the existing replica number of
> cluster or vdi.
> 
> We also got the requirement and already achieved it. Currently, only
> changing replica number is permitted. Changing erasure code is not
> implemented.
> 
> Some examples are as below.
> 
> $ dog cluster copies 2
>     __
>    ()'`;
>    /\|`  Caution! Changing the # of replica will affect
>   /  |   all the VDIs to be created later.
> (/_)_|_  Are you sure you want to continue? [yes/no]: yes
> set the cluster's replica success.

So this doesn't change the copy number of exsiting vdis?

> 
> $ dog cluster info -s
> Cluster status: running, auto-recovery enabled
> Cluster store: plain with 2 redundancy policy
> 
> Cluster created at Mon May  5 14:28:02 2014
> 
> Epoch Time           Version
> 2014-05-05 14:28:02      1 [127.0.0.1:7000, 127.0.0.1:7001, 127.0.0.1:7002]
> 
> $ dog vdi copies test 3
>     __
>    ()'`;
>    /\|`  Caution! Changing the # of replica will affect
>   /  |   the specified VDI and trigger recovery.
> (/_)_|_  Are you sure you want to continue? [yes/no]: yes
> set the vdi's replica success.
> 
> $ dog vdi list
>   Name        Id    Size    Used  Shared    Creation time   VDI id
> Copies  Tag
>   test         0   12 MB   12 MB  0.0 MB 2014-05-05 14:29 7c2b25      3
> 
> I think this feature sometimes is useful. If you think it is worth
> to do it, I am glad to contribute the patch.
>

I agree. Feel free to submit the patch the mailing list.

Thanks
Yuan