[sheepdog-users] Time to get a node info or md info

[Liu Yuan]

On Fri, Aug 09, 2013 at 11:32:34PM +0200, Valerio Pachera wrote:
> 2013/8/9 Liu Yuan <namei.unix at gmail.com>:
> > The long wait time doesn't attribute to how sheepdog get the disk usage, but how
> > busy sheep daemon is. In the recovery, sheep main loop is saturated by recovery
> > requests and the 'md info' get kind of starved.
> 
> Ok, clear.
> During recovery sheep was using no more than 20% of cpu and disks are
> busy between 30% and 60% (on the weak server).
> With no recovery and no guests running, it takes 30 seconds.
> 
> root at sheepdog001:~# collie node recovery
> Nodes In Recovery:
>   Id   Host:Port         V-Nodes       Zone       Progress
> 
> root at sheepdog001:~# time collie node md info --all
> Id      Size    Used    Avail   Use%    Path
> Node 0:
>  0      166 GB  154 GB  12 GB    92%    /mnt/sheep/dsk01/obj
>  1      465 GB  319 GB  147 GB   68%    /mnt/sheep/dsk02
>  2      1.8 TB  1.1 TB  716 GB   61%    /mnt/sheep/dsk03
> Node 1:
>  0      166 GB  84 GB   82 GB    50%    /mnt/sheep/dsk01/obj
>  1      465 GB  299 GB  166 GB   64%    /mnt/sheep/dsk02
>  2      1.8 TB  1.2 TB  667 GB   64%    /mnt/sheep/dsk03
> Node 2:
>  0      2.7 TB  1.9 TB  873 GB   68%    /mnt/sheep/dsk02
> Node 3:
>  0      465 GB  215 GB  250 GB   46%    /mnt/sheep/dsk03
>  1      1.8 TB  1.4 TB  449 GB   75%    /mnt/sheep/dsk04
> 
> real    0m30.504s
> user    0m0.000s
> sys     0m0.012s
> 
> Correct me if I'm wrong but md info is calculated one after the other,
> not in parallel right?

No, not in parallel as you guessed. Collie's performance will be enhanced in
the later version.

Thanks
Yuan