Best mkfs.ext2 performance options on RAID5 in CentOS 4.2

[jlb17 at duke.edu (Joshua Baker-LePain)]

On Tue, 1 Nov 2005 at 11:43am, Aleksandar Milivojevic wrote

> What I found with an old(er) 3ware 7500-8 (does not use same device driver as
> 9xxx cards) in RAID5 configuration was that it makes big difference using 
> ext2
> or ext3 (doubles the write speed, no effect on read speed).  With ext3 I used
> internal journal (external migh have helped, but haven't tested it).

I tested with an external journal on a hardware (8506-2) RAID1 of 2 WD 
Raptor drives, and it made no difference.  What *did* make a difference 
was using XFS (via the centosplus kernel), but I didn't trust that in 
production.  I ended up going to software RAID, which got good local 
speeds.  I'm discovering now, though, that the NFS performance sucks.

-- 
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University