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
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.
|