Eugen Leitl wrote:
Below bonnie++ stats are pretty bad for a RAID 10 of 14 SATA
drives (WD RE4, 2 TByte), right?
Well, we'd suggest using fio rather than bonnie++, but I'll save that
for a post somewhere else.
[ora...@localhost data]$ bonnie++ -d /data/blah
[...]
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
localhost.lo 47320M 82406 99 466201 46 124266 17 73482 96 541644 33 415.4
0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 5488 4 +++++ +++ 4292 0 3883 3 +++++ +++ 2580 1
localhost.localdomain,47320M,82406,99,466201,46,124266,17,73482,96,541644,33,415.4,0,16,5488,4,+++++,+++,4292,0,3883,3,+++++,+++,2580,1
Your block output is 466MB/s, for something like 7 disks (14 disk
RAID10). So This means you are getting 66.6 MB/s per drive for write,
and 77.4 MB/s per drive for read.
The 2TB RE4 drives can read at about 110 MB/s and write at about 105
MB/s (from our tests in the lab). So you are in the range of 60 to 70%
efficiency.
Not bad. RAID10 tends to be more efficient than RAID6 or RAID5 (at
least the software versions of these).
--
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics, Inc.
email: land...@scalableinformatics.com
web : http://scalableinformatics.com
http://scalableinformatics.com/jackrabbit
phone: +1 734 786 8423 x121
fax : +1 866 888 3112
cell : +1 734 612 4615
_______________________________________________
Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
