Re: ceph recovery killing vms

[Karan Singh <ksingh@xxxxxx>]

Hello RZK

Would you like to share your experience on this problem and your way of solving it . This sounds interesting.

Regards
Karan Singh 

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From: "Rzk" <konoha.sharingan@xxxxxxxxx>
To: ceph-users@xxxxxxxxxxxxxx
Sent: Wednesday, 30 October, 2013 4:17:32 AM
Subject: Re: [ceph-users] ceph recovery killing vms

Thanks Guys,

after tested it in dev server, i have implemented the new config in prod system.

next i will upgrade the hard drive.. :)

thanks again All.

On Tue, Oct 29, 2013 at 11:32 PM, Kyle Bader <kyle.bader@xxxxxxxxx> wrote:

Recovering from a degraded state by copying existing replicas to other OSDs is going to cause reads on existing replicas and writes to the new locations. If you have slow media then this is going to be felt more acutely. Tuning the backfill options I posted is one way to lessen the impact, another option is to slowly lower the weight in CRUSH for the OSD(s) you want to remove. Hopefully that helps!

--

Kyle

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