after couple runs of tpc-H , RHEL 5.4 /dev/sdd is heavily fragmented.
so back to the original problem. it always happen on /dev/sdd
[root@sdw9 data1]# xfs_db -c frag -r /dev/sdb
actual 1773, ideal 1731, fragmentation factor 2.37%
[root@sdw9 data1]# xfs_db -c frag -r /dev/sdd
actual 43384, ideal 1726, fragmentation factor 96.02%
[root@sdw9 data1]# xfs_info /dev/sdb
meta-data="" isize=256 agcount=32, agsize=22469715 blks
= sectsz=512 attr=0
data = bsize=4096 blocks=719030880, imaxpct=25
= sunit=0 swidth=0 blks, unwritten=1
naming =version 2 bsize=4096
log =internal bsize=4096 blocks=32768, version=1
= sectsz=512 sunit=0 blks, lazy-count=0
realtime =none extsz=4096 blocks=0, rtextents=0
[root@sdw9 data1]# xfs_info /dev/sdd
meta-data="" isize=256 agcount=32, agsize=22469715 blks
= sectsz=512 attr=0
data = bsize=4096 blocks=719030880, imaxpct=25
= sunit=0 swidth=0 blks, unwritten=1
naming =version 2 bsize=4096
log =internal bsize=4096 blocks=32768, version=1
= sectsz=512 sunit=0 blks, lazy-count=0
realtime =none extsz=4096 blocks=0, rtextents=0
67 files on both /dev/sdb and /dev/sdd.
On 9/9/10 3:06 PM, "Eric Sandeen" <sandeen@xxxxxxxxxxx> wrote:
On 09/09/2010 04:59 PM, Brady Chang wrote:
> thanks guys for the feedback.
> iostat shows balanced io between two filesystems.
> testing with RHEL 54, no issues there. seems to be happening on RHEL 55
> only.
There were no xfs changes between 5.4 and 5.5 that should be relevant,
only a single bugfixes for 5.5, related to fallocate error returns.
Just FWIW.
-Eric
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