From: Mark Kirkwood <mark.kirkwood@catalyst.net.nz>
To: Sage Weil <sage@inktank.com>
Cc: ceph-devel@vger.kernel.org
Subject: Re: Osd placement rule questions
Date: Thu, 05 Jul 2012 16:55:05 +1200 [thread overview]
Message-ID: <4FF51E29.3000205@catalyst.net.nz> (raw)
In-Reply-To: <Pine.LNX.4.64.1207042055350.6931@cobra.newdream.net>
On 05/07/12 15:57, Sage Weil wrote:
> On Thu, 5 Jul 2012, Mark Kirkwood wrote:
>
>> 2/ Also I would like to be able to say make my number of copies 3, but if I
>> lose datacenter0 (where 2 copies are), don't try to have 3 copies at
>> datacenter1 (so run degraded in that case). Is that possible?
> That is what you get now. Doing the opposite (2 copies in DC1, 1 in DC2,
> but if DC2 is down 3 in DC1) is not currently possible with the crush
> rules.
>
Ah, right - excellent and thanks for clarifying! I guess I was
unconsciously (and incorrectly) thinking that the crush rule would be
modified when (say) datacenter0 was not available.
Cheers
Mark
prev parent reply other threads:[~2012-07-05 4:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-05 3:45 Osd placement rule questions Mark Kirkwood
2012-07-05 3:57 ` Sage Weil
2012-07-05 4:55 ` Mark Kirkwood [this message]
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