* Re: xattr limits
[not found] ` <31BF914D-D406-428E-8671-0005901E10E6@inktank.com>
@ 2013-10-04 11:16 ` Christoph Hellwig
0 siblings, 0 replies; only message in thread
From: Christoph Hellwig @ 2013-10-04 11:16 UTC (permalink / raw)
To: David Zafman; +Cc: Loic Dachary, ceph-devel@vger.kernel.org, xfs
Might be good to send the crash report to the XFS list..
On Thu, Oct 03, 2013 at 11:54:29PM -0700, David Zafman wrote:
>
> Here is the test script:
>
>
> David Zafman
> Senior Developer
> http://www.inktank.com
>
>
>
>
> On Oct 3, 2013, at 11:02 PM, Loic Dachary <loic@dachary.org> wrote:
>
> > Hi David,
> >
> > Would you mind attaching the script to the mail for completness ? It's a useful thing to have :-)
> >
> > Cheers
> >
> > On 04/10/2013 01:21, David Zafman wrote:
> >>
> >> I want to record with the ceph-devel archive results from testing limits of xattrs for Linux filesystems used with Ceph.
> >>
> >> Script that creates xattrs with name user.test1, user.test2, ?. on a single file
> >> 3.10 linux kernel
> >>
> >> ext4
> >> value bytes number of entries
> >> 1 148
> >> 16 103
> >> 256 14
> >> 512 7
> >> 1024 3
> >> 4036 1
> >> Beyond this immediately get ENOSPC
> >>
> >> btrfs
> >> value bytes number of entries
> >> 8 10k
> >> 16 10k
> >> 32 10k
> >> 64 10k
> >> 128 10k
> >> 256 10k
> >> 512 10k slow but worked 1,000,000 got completely hung for minutes at a time during removal strace showed no forward progress
> >> 1024 10k
> >> 2048 10k
> >> 3096 10k
> >> Beyond this you start getting ENOSPC after fewer entries
> >>
> >> xfs (limit entries due to xfs crash with 10k entries)
> >> value bytes number of entries
> >> 1 1k
> >> 8 1k
> >> 16 1k
> >> 32 1k
> >> 64 1k
> >> 128 1k
> >> 256 1k
> >> 512 1k
> >> 1024 1k
> >> 2048 1k
> >> 4096 1k
> >> 8192 1k
> >> 16384 1k
> >> 32768 1k
> >> 65536 1k
> >>
> >> --
> >> 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
> >>
> >
> > --
> > Lo?c Dachary, Artisan Logiciel Libre
> > All that is necessary for the triumph of evil is that good people do nothing.
> >
>
---end quoted text---
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