Re: [gentoo-user] XFS FileSystem - Slow Writes

[Mark Kirkwood <markir@paradise.net.nz>]

Mark Kirkwood wrote:
> Ow Mun Heng wrote:
>>
>> I've already updated it to the latest based on the suspend2 version.
>> $uname -r
>> 2.6.17-suspend2-r4
>>
>> $eix xfsprogs
>>      Available versions:  2.7.3 2.7.11 2.8.10
>>      Installed:           2.8.10
>>
>>
>> If not mistaken, the issue, (or barriers if not mistaken) was introduced
>> in the 2.6.17 kernel series.
>> the 2.6.16 series wasn't affected. (I could be wrong, I don't have net
>> access so, I can't verify)
>>
> 
> Right - as it happens I'm doing an update today, so will let you know if 
>   I see any write performance change.
> 


FWIW, I've updated to 2.6.17 and I don't see any change in performance 
at all (215Mb/s reads and 100Mb/s writes).

Now I'm on the standard source tree:

$ uname -r
2.6.17-gentoo-r7

$ eix xfsprogs
      Available versions:  2.7.3 2.7.11 ~2.8.10
      Installed:           2.7.11

which may be a factor.

The other thing I notice is that my filesystems are all under 50%, 
whereas your troublesome one was at 80%or so:

$ df -m
Filesystem           1M-blocks      Used Available Use% Mounted on
/dev/md/2                  529       134       395  26% /
/dev/md/0                  129        10       120   8% /boot
/dev/md/3                 3911        32      3880   1% /tmp
/dev/md/4                 3911       175      3737   5% /var
/dev/md/5                19537      3008     16530  16% /usr
/dev/md/6                19537      2668     16870  14% /home
/dev/md/7               104841     25682     79160  25% /data0

I might try writing a few big files to fill one of 'em up and see if it 
makes any difference!

Cheers

Mark
-- 
gentoo-user@gentoo.org mailing list