I can't seem to get the read and write performance better than
approximately 40MB/s on an ext2 file system. IMO, this is horrible
performance for a 6-drive, hardware RAID 5 array. Please have a look at
what I'm doing and let me know if anybody has any suggestions on how to
improve the performance...
System specs:
-----------------
2 x 2.8GHz Xeons
6GB RAM
1 3ware 9500S-12
2 x 6-drive, RAID 5 arrays with a stripe size of 256KB. Each array is
2.3TB after formatting.
ioscheduler set to use the deadline scheduler.
mkfs.ext2 options used:
------------------------
mkfs.ext2 -b 4096 -L /d01 -m 1 -O sparse_super,dir_index -R stride=64 -T
largefile /dev/sda1
I'm using a stride size of 64 since the ext2 block size is 4KB and the
array stripe size is 256KB (256/4 = 64).
Output of using bonnie++:
---------------------------
$ /usr/local/bonnie++/sbin/bonnie++ -d /d01/test -r 6144 -m
anchor_ext2_4k_64s
Version 1.03 ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
/sec %CP
anchor_ext2_4k_ 12G 41654 96 41937 11 30537 8 40676 88 233015 27
426.6 1
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 3369 83 +++++ +++ +++++ +++ 4142 100 +++++ +++
11728 100
Cheers!
Sean
