From: "Luis R. Rodriguez" <mcgrof@kernel.org>
To: Eric Sandeen <sandeen@sandeen.net>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>,
"swadmin - levigo.de" <swadmin@levigo.de>,
linux-xfs@vger.kernel.org
Subject: Re: Mounting xfs filesystem takes long time
Date: Thu, 21 Jun 2018 21:15:35 +0200 [thread overview]
Message-ID: <20180621191535.GI7508@wotan.suse.de> (raw)
In-Reply-To: <e9a7c539-1dea-1050-19bc-b0eb7e788b33@sandeen.net>
On Tue, Jun 19, 2018 at 02:21:15PM -0500, Eric Sandeen wrote:
> On 6/19/18 11:18 AM, Darrick J. Wong wrote:
> > On Tue, Jun 19, 2018 at 02:27:29PM +0200, swadmin - levigo.de wrote:
> >> Hi @all
> >> I have a problem with mounting a large XFS filesystem which takes about
> >> 8-10 minutes.
> >>
> >>
> >>
> >> :~# df -h /graylog_data
> >> Filesystem Size Used Avail Use% Mounted on
> >> /dev/mapper/vgdata-graylog_data 11T 5.0T 5.1T 50% /graylog_data
> >>
> >> ----
> >>
> >> :~# xfs_info /dev/mapper/vgdata-graylog_data
> >> meta-data=/dev/mapper/vgdata-graylog_data isize=512 agcount=40805,
> >> agsize=65792 blks
> >
> > 41,000 AGs is a lot of metadata to load. Did someone growfs a 1G fs
> > into a 11T fs?
>
> <answer: yes, they did>
>
> Let me state that a little more clearly: this is a badly mis-administered
> filesystem; 40805 x 256MB AGs is nearly unusable, as you've seen.
>
> If at all possible I would start over with a rationally-created filesystem
> and migrate the data.
Considering *a lot* of folks may typically follow the above "trap", wouldn't it
be wise for userspace to complain or warn when the user may want to do
something stupid like this? Otherwise I cannot see how we could possibly
conceive that this is badly administered filesystem.
Luis
next prev parent reply other threads:[~2018-06-21 19:15 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-19 12:27 Mounting xfs filesystem takes long time swadmin - levigo.de
2018-06-19 16:00 ` Emmanuel Florac
2018-06-19 16:18 ` Darrick J. Wong
2018-06-19 19:21 ` Eric Sandeen
2018-06-21 19:15 ` Luis R. Rodriguez [this message]
2018-06-21 19:19 ` Eric Sandeen
2018-06-21 21:50 ` Chris Murphy
2018-06-21 22:19 ` Dave Chinner
2018-06-22 3:19 ` Chris Murphy
2018-06-22 4:02 ` Dave Chinner
2018-06-27 23:23 ` Luis R. Rodriguez
2018-06-27 23:37 ` Eric Sandeen
2018-06-28 2:05 ` Dave Chinner
2018-06-28 8:19 ` Carlos Maiolino
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