At 21:42 14-1-2004 -0800, Mike Young wrote:
I would certainly be sure to use the external journal. In order to do this
with our 3Ware RAID-5, take the resulting RAID (say /dev/sda) and partition
it with sda1 being around 256MB. Then create sda2 using the rest of the
Using the external journal gives the most benefit on Linux software raid
Put the log on another partition on the same logical disk doesn't make
sense to me.
My suggestions are using sunit=4096 and swidth=3 (n-1). You could use a
larger stripeunit sizes but I don't remember helping it much. Besides that,
using a 64k stripe will results in 192k total stripe size. You need to
specify this on the mount command since the default mounts upto 64k in
I tested this some months ago on a 6 disk configuration and the results did
not differ much from the defaults.
Creating a larger log will help the filesystem if you perform a lot of
operations on it. I create my larger filesystems this way. It helps a lot
on the IOPS.
I don't make sense, I don't pretend to either. Questions?