Justin Piszcz wrote: > Hi, > > I was wondering if the XFS folks can recommend any optimizations for high > speed disk arrays using RAID5? > > As well as if there is anything else I can do on the MD side? > > fs.xfs.restrict_chown = 1 > fs.xfs.irix_sgid_inherit = 0 > fs.xfs.irix_symlink_mode = 0 OT but... /me wonders if some of these could go away by now... :) -Eric > fs.xfs.panic_mask = 0 > fs.xfs.error_level = 3 > fs.xfs.xfssyncd_centisecs = 3000 > fs.xfs.inherit_sync = 1 > fs.xfs.inherit_nodump = 1 > fs.xfs.inherit_noatime = 1 > fs.xfs.xfsbufd_centisecs = 100 > fs.xfs.age_buffer_centisecs = 1500 > fs.xfs.inherit_nosymlinks = 0 > fs.xfs.rotorstep = 1 > fs.xfs.inherit_nodefrag = 1 > fs.xfs.stats_clear = 0 > > There is also vm/dirty tunable in /proc. > > I was wondering what are some things to tune for speed? I've already > tuned the MD layer but is there anything with XFS I can also tune? > > echo "Setting read-ahead to 64MB for /dev/md3" > blockdev --setra 65536 /dev/md3 > > echo "Setting stripe_cache_size to 16MB for /dev/md3" > echo 16384 > /sys/block/md3/md/stripe_cache_size > > (also set max_sectors_kb) to 128K (chunk size) and disable NCQ > > Justin. > > - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
