blockdev --setra 16384 /dev/sda Sean Staats wrote: > 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 > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos -- Joseph Landman, Ph.D Founder and CEO Scalable Informatics LLC, email: landman at scalableinformatics.com web : http://www.scalableinformatics.com phone: +1 734 786 8423 fax : +1 734 786 8452 cell : +1 734 612 4615