Feizhou wrote:
William Warren wrote:
as soon as you goto software raid 5 you'll get a good performance
hit. Head for the hardware raid cards then. You can get the 3ware
ide cards for 150 or less now.
don't know if it is still the case but ext3 + 3ware + ext3 = ultra
slow. you'd want to use XFS or some other filesystem...
I keep hearing about this "slowness" thing. Here is a bonnie++ run on
one of my spare machines. This particular machine is also running 4
copies of Folding@Home in the background during the test. The array
being tested is on a 3Ware 9550 card with 8 500gig barracudas. The
filesystem is a standard ext3 filesystem with zero tweaks. It doesn't
appear that slow to me, but perhaps I'm just easy to please.
[ritz@localhost data]$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
73575592 2868764 66909020 5% /
/dev/hda1 101086 16078 79789 17% /boot
/dev/sda1 3844873244 561019948 3088544960 16% /data
tmpfs 1035584 0 1035584 0% /dev/shm
[ritz@localhost data]$ whereis bonnie++
bonnie++: /usr/sbin/bonnie++ /usr/share/man/man8/bonnie++.8.gz
[ritz@localhost data]$ clear
[ritz@localhost data]$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
73575592 2868764 66909020 5% /
/dev/hda1 101086 16078 79789 17% /boot
/dev/sda1 3844873244 561019948 3088544960 16% /data
tmpfs 1035584 0 1035584 0% /dev/shm
[ritz@localhost data]$ /usr/sbin/bonnie++ -f
Writing intelligently...done
Rewriting...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
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.locald 4G 203807 96 169178 65 392171 63
611.2 2
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++
+++++ +++
localhost.localdomain,4G,,,203807,96,169178,65,,,392171,63,611.2,2,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++
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