[cobalt-users] DISK I/O Performance,RaQ3i and RAID0

["Peter R. Hubberstey" <peter@xxxxxxxx>]

Hello all.

Running a raq3 as a makeshift cruddy mail server and the syslogd just takes
up SO much CPU time it's untrue.

I've done loads of things such as reducing log levels, rotating the logs
more frequently etc etc but it's still much the same. It's basically
handling TOO much mail and the IO performance is as slow and lumpy as a
1920's tractor... you know - all thick and muddy...

Now - Here it comes...

I've played around with RAID0 on a test machine here, and the performance
increase is tremendous. I was thinking about doing the following.

add second IDE drive (preferably on a separate controller)

umount /home

make a /etc/raidtab describing a RAID0 device /dev/md0 using /dev/hda3 and
*say* /dev/hdc1

mkraid /dev/md0

mke2fs -b 4096 -v /dev/md0

edit /etc/fstab - /home is now /dev/md0

Long pause for contemplation and prayer. A brew.

mount -a

Slowly open eyes to see...

Firstly - does anyone have any thoughts about this???

Perhaps someone has tried this on a RaQ3 before me ???

Does anyone know if RAID0 support was compiled into the 2.2.14C5 kernel???
I've checked 2.2-14 source and it is there...

Any thoughts very very very greatly appreciated



Regards;

P. R. Hubberstey.

--

Problems will no doubt ensue (tm)