From: Stan Hoeppner <stan@hardwarefreak.com>
To: Martin Steigerwald <Martin@lichtvoll.de>
Cc: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>, xfs@oss.sgi.com
Subject: Re: suddenly slow writes on XFS Filesystem
Date: Mon, 07 May 2012 11:44:12 -0500 [thread overview]
Message-ID: <4FA7FBDC.9070308@hardwarefreak.com> (raw)
In-Reply-To: <201205071021.14478.Martin@lichtvoll.de>
On 5/7/2012 3:21 AM, Martin Steigerwald wrote:
> Am Montag, 7. Mai 2012 schrieb Stefan Priebe - Profihost AG:
>> after deleting 400GB it was faster. Now there are still 300GB free but
>> it is slow as hell again ;-(
>
> Well, before you had 200 GB free, now you have 300 GB free. Thats not that
> much more. You have 5 AGs, so if distributed evenly it would be 40 to 60
> GB free space per AG.
>
> The 10% Dave recommended of 4,6 TB would be 460 GB.
As I mentioned, increasing the size of the free space pool will only
help for a short duration. Most of the files Stefan is deleting are
small files. Thus he's simply punching out small holes of free space,
which is the problem he already has. Now if he could delete a handful
of large files (10GB+) that are mostly contiguous now, that would help
quite a bit, as the resulting free space wouldn't be horribly fragmented.
So the takeaway is that simply deleting files to get more space isn't
the right way to go. Deleting larger files that are currently
contiguous is the way to go. At least for some temporary breathing
room. The "permanent" solution I described in another reply.
--
Stan
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
next prev parent reply other threads:[~2012-05-07 16:44 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-06 9:01 suddenly slow writes on XFS Filesystem Stefan Priebe
2012-05-06 10:31 ` Martin Steigerwald
2012-05-06 10:33 ` Martin Steigerwald
2012-05-06 15:45 ` Stan Hoeppner
2012-05-06 19:25 ` Stefan Priebe
2012-05-07 1:39 ` Dave Chinner
2012-05-06 21:43 ` Martin Steigerwald
2012-05-07 6:40 ` Stefan Priebe - Profihost AG
2012-05-07 1:34 ` Dave Chinner
2012-05-07 6:39 ` Stefan Priebe - Profihost AG
2012-05-07 7:17 ` Dave Chinner
2012-05-07 7:22 ` Stefan Priebe - Profihost AG
2012-05-07 16:36 ` Stan Hoeppner
2012-05-07 19:08 ` Martin Steigerwald
2012-05-07 20:05 ` Stefan Priebe
2012-05-09 6:57 ` Stan Hoeppner
2012-05-09 7:04 ` Dave Chinner
2012-05-09 7:36 ` Stefan Priebe - Profihost AG
2012-05-09 7:49 ` Stan Hoeppner
2013-02-15 15:06 ` 32bit apps and inode64 Stefan Priebe - Profihost AG
2013-02-15 21:46 ` Ben Myers
2013-02-16 10:24 ` Stefan Priebe - Profihost AG
2013-02-17 21:33 ` Dave Chinner
2013-02-18 8:12 ` Stefan Priebe - Profihost AG
2013-02-18 22:06 ` Dave Chinner
2013-02-17 8:13 ` Jeff Liu
2013-02-19 19:11 ` Ben Myers
2012-05-07 23:42 ` suddenly slow writes on XFS Filesystem Dave Chinner
2012-05-07 8:21 ` Martin Steigerwald
2012-05-07 16:44 ` Stan Hoeppner [this message]
2012-05-07 8:31 ` Martin Steigerwald
2012-05-07 13:57 ` Stefan Priebe - Profihost AG
2012-05-07 14:32 ` Martin Steigerwald
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=4FA7FBDC.9070308@hardwarefreak.com \
--to=stan@hardwarefreak.com \
--cc=Martin@lichtvoll.de \
--cc=s.priebe@profihost.ag \
--cc=xfs@oss.sgi.com \
/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.