On 04/10/2012 10:02 AM, Stefan Ring wrote:
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 I changed the stripe size to 32kb in the meantime. This way, it performs slightly better.
try 128k to 512k for stripe size. And try to increase your agcount by (nearly) an order of magnitude.
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