From: Wido den Hollander <wido@widodh.nl>
To: Eric_YH_Chen@wistron.com
Cc: ceph-devel@vger.kernel.org, Chris_YT_Huang@wistron.com,
Alex_KT_Lin@wistron.com
Subject: Re: Why only support odd number monitors in ceph cluster?
Date: Fri, 23 Dec 2011 10:34:11 +0100 [thread overview]
Message-ID: <4EF44B13.80301@widodh.nl> (raw)
In-Reply-To: <8512670932FB654F81AF0FEF1BE6D49DABFBE6@WHQBEMAIL1.whq.wistron>
Hi,
On 12/23/2011 08:21 AM, Eric_YH_Chen@wistron.com wrote:
> Hi, all:
>
> I am curious about why ceph cluster only support odd number monitors.
It doesn't only support a odd number. A even number of monitors works in
theory, but it's recommended to use a odd number to get a majority.
>
> If we lose 1 monitor (becomes odd number),
You shouldn't look to the number of online monitors, but to the number
of monitors in your monmap. That should be a odd number.
Wido
>
> would it cause any problem if we do not handle this situation in short time?
>
> Thanks!
>
> --
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next prev parent reply other threads:[~2011-12-23 9:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-23 7:21 Why only support odd number monitors in ceph cluster? Eric_YH_Chen
2011-12-23 9:34 ` Wido den Hollander [this message]
2011-12-23 15:48 ` Sage Weil
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