Recommendation to safely avoid problems with osd-failure

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See the anti-cephalopod thread on this ML.

On Mon, 28 Jul 2014 12:23:02 +0200 Josef Johansson wrote:

> Hi,
> 
> I'm trying to compile a strategy to avoid performance problems if osds
> or osd hosts fails.
> 
> If I encounter a re-balance of one OSD during mid-day, there'll be
> problems with performance right now, if I could see the issue and let it
> re-balance during evening, that would be great.
> 
> I.e. if two OSD hosts dies around the same time I suspect that the
> clients would suffer greatly.
> 
> Currently the osd has the following settings
> 
>      osd max backfills = 1
>      osd recovery max active = 1
> 
> Is there any general guidance or recommendation for unexpected outages?
> 
> Cheers,
> Josef Johansson
> _______________________________________________
> ceph-users mailing list
> ceph-users at lists.ceph.com
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> 


-- 
Christian Balzer        Network/Systems Engineer                
chibi at gol.com   	Global OnLine Japan/Fusion Communications
http://www.gol.com/


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