From: Wolfgang Hennerbichler <wolfgang.hennerbichler@risc-software.at>
To: Kelvin_Huang@wiwynn.com
Cc: ceph-devel@vger.kernel.org, Eric_YH_Chen@wiwynn.com
Subject: Re: Ceph availability test & recovering question
Date: Tue, 19 Mar 2013 06:17:44 +0100 [thread overview]
Message-ID: <5147F4F8.40505@risc-software.at> (raw)
In-Reply-To: <86F425174C7E4F418CCF4E62056152E593906F@GDC-CLDMBX-P01.whq.wistron>
On 03/17/2013 05:18 AM, Kelvin_Huang@wiwynn.com wrote:
> Hi, all
Hi,
> ...
> My question is:
> 1.The state of I/O pause is normal when ceph recovering ?
I have experienced the same issue. This works as designed, and is
probably because of the heartbeat-timeout in "osd heartbeat grace"
period set to 20 secs - see:
http://ceph.com/docs/master/rados/configuration/mon-osd-interaction/
> 2.The pause time of I/O that can not be avoided when ceph recovering ?
You can always lower the grace period and heartbeat time, though I don't
know if this is a wise idea. Short networking interruptions might mark
your OSD out very quickly then.
> 3.How to reduce the I/O pause time ?
see the link above, or this link here:
http://ceph.com/docs/master/rados/configuration/osd-config-ref/#monitor-osd-interaction
>
> Thanks!!
> --
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--
DI (FH) Wolfgang Hennerbichler
Software Development
Unit Advanced Computing Technologies
RISC Software GmbH
A company of the Johannes Kepler University Linz
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Softwarepark 35
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Phone: +43 7236 3343 245
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wolfgang.hennerbichler@risc-software.at
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prev parent reply other threads:[~2013-03-19 5:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-17 4:18 Ceph availability test & recovering question Kelvin_Huang
[not found] ` <86F425174C7E4F418CCF4E62056152E593906F-UIpX7S6nw9GOBoeAmZP4UcGhad3MGN0iN1zbfrtuF1Y@public.gmane.org>
2013-03-18 15:41 ` Andrey Korolyov
2013-03-19 5:17 ` Wolfgang Hennerbichler [this message]
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