RAID5 with 128kb chunk size.
Raid0 was 317MB/s write and 279MB/s read.
# xfs_growfs -n /dev/md3
meta-data=/dev/md3 isize=256 agcount=16, agsize=6868160
blks
= sectsz=4096 attr=0
data = bsize=4096 blocks=109890528, imaxpct=25
= sunit=32 swidth=96 blks, unwritten=1
naming =version 2 bsize=4096
log =internal bsize=4096 blocks=32768, version=2
= sectsz=4096 sunit=1 blks
realtime =none extsz=393216 blocks=0, rtextents=0
On Fri, 12 Jan 2007, David Chinner wrote:
> On Thu, Jan 11, 2007 at 06:05:36PM -0500, Justin Piszcz wrote:
> > With 4 Raptor 150s & XFS (default XFS options):
>
> I need more context for this to be meaningful in any way.
>
> What type of md config are you using here? RAID0, 1, 5.....?
>
> What's the raw device throughput (i.e. read and write to /dev/md3)?
>
> output of 'growfs_xfs -n <mntpt>'? (i.e. is XFS doing aligned
> or unaligned allocation/IO)?
>
> If it's raid0, how does it compare with a dm stripe?
>
> Cheers,
>
> Dave.
> --
> Dave Chinner
> Principal Engineer
> SGI Australian Software Group
>
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