Redundant NFS storage setup (part 3) : The disappointing PERC5/E

[Tino Schwarze]

On Thu, Jan 03, 2008 at 02:16:06PM +0100, Matthias Saou wrote:

> > Are you using the latest megaraid_sas? I've seen speed improvements
> > using the new driver.
> 
> Yes, on RHEL5.1 x86_64 rebuilt with dkms from the Dell provided
> sources :
> 
> # modinfo megaraid_sas
> filename:       /lib/modules/2.6.18-53.1.4.el5/extra/megaraid_sas.ko
> description:    LSI Logic MegaRAID SAS Driver
> author:         megaraidlinux at lsi.com
> version:        00.00.03.16
> [...]
> 
> On top of the RAID array, I use XFS :
> # modinfo xfs
> filename:       /lib/modules/2.6.18-53.1.4.el5/extra/xfs.ko
> license:        GPL
> description:    SGI XFS with ACLs, security attributes, realtime, large
> block/inode numbers, no debug enabled
> author:         Silicon Graphics, Inc.
> srcversion:     BBB854051112D7CF26B397E
> depends:        
> vermagic:       2.6.18-53.1.4.el5 SMP mod_unload gcc-4.1
> 
> I always create the filesystem with :
> # mkfs.xfs -f -L data -i size=512 /dev/sdb1

Have you tried specifying the RAID stripe size and width -d su=128k,sw=x?

Tino.

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