From: Wido den Hollander <wido@widodh.nl>
To: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
Cc: "ceph-devel@vger.kernel.org" <ceph-devel@vger.kernel.org>
Subject: Re: mon disk access pattern
Date: Fri, 15 Jun 2012 11:51:35 +0200 [thread overview]
Message-ID: <4FDB05A7.3080202@widodh.nl> (raw)
In-Reply-To: <4FDACD90.2080807@profihost.ag>
Hi,
On 15-06-12 07:52, Stefan Priebe - Profihost AG wrote:
> Hello list,
>
> i read somewhere that the mon has "special" disk access patterns - even
> though it does not write much data.
"special"? Where did you read that? The monitor has about 1 ~ 2GB of
storage.
So if your monitor has something like 4GB ~ 8GB of RAM, your kernel
should cache almost all your monitor data.
>
> I'm using a patched debian squeeze with syncfs support (thanks to amon).
> Are there any recommandations where to put the mon data? (SSD? Raid?
> Which FS?)
>
Something like a regular disk with ext4 should be fine, but you can
always put in an SSD if you want that.
Wido
> Greets,
> Stefan
> --
> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2012-06-15 9:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-15 5:52 mon disk access pattern Stefan Priebe - Profihost AG
2012-06-15 9:51 ` Wido den Hollander [this message]
2012-06-15 11:34 ` Mark Nelson
2012-06-15 16:30 ` Sage Weil
2012-06-15 20:31 ` Stefan Priebe
2012-06-18 6:39 ` Stefan Priebe - Profihost AG
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4FDB05A7.3080202@widodh.nl \
--to=wido@widodh.nl \
--cc=ceph-devel@vger.kernel.org \
--cc=s.priebe@profihost.ag \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.