Re: XFS: Abysmal write performance because of excessive seeking (allocation groups to blame?)

Martin Steigerwald
2012-04-10T18:13:21Z

Am Dienstag, 10. April 2012 schrieb Stefan Ring:
> > And is XFS aligned to the RAID 6?
> >
> > What does xfs_info display on it?
>
> Yes, it’s aligned.
>
> meta-data=/dev/mapper/vg_data-lvhome isize=256 agcount=4,
> agsize=73233656 blks
> = sectsz=512 attr=2
> data = bsize=4096 blocks=292934624,
> imaxpct=5 = sunit=8 swidth=32 blks
> naming =version 2 bsize=4096 ascii-ci=0
> log =internal bsize=4096 blocks=143040, version=2
> = sectsz=512 sunit=8 blks,
> lazy-count=1 realtime =none extsz=4096 blocks=0,
> rtextents=0

Hmmm, so its not the alignment. xfs_info output looks sane otherwise.

I have no further ideas for now. But others had it seems. (Reading rest of
new messages in thread.)

Ciao,
--
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7