> > So which would be the best way splitting volumens taken :
> > - No RAW-Devices wanted (Leading to another question : which 
> > FS for Lunix?)
> 
> Why not? Running perfect here - and you won't get trashed 
> filesystem I/O buffers when doing backup... 

ACK. Prefer raw devices.

> ReiserFS on SuSE, ext3 on RedHat, both don't do each other much. 
> Just don't use XFS, it's quite slow compared to Reiser (out
> of my experience), especially when writing.

Hmm, when it's for performance, I'd never use a journaling file system for 
database files. It imposes a lot of logging overhead which is not neccessary 
because the database does its own logging. If the server crashes and the data 
volumes are damaged, then you have to restore anyway. So the journaling gives 
no benefit.

> > - 3 Disks on Raid-5 for Data

Besides for performance, RAID5 is not really the safety king as which it is 
sold. See http://www.baarf.com for reasons. 

> > - 2 Disks on Raid-1 for Log
> 
> We use one Volume per disk (even when using RAID-5) so if you 
> have three disks doing RAID-5 then you should create three 
> volumes (if it's 150 GB then 50 GB each).

ACK. The number of volumes should be equal to the number of physical disks.

Regards
Christian

-- 
#include <std_disclaimer.h>
/* The opinions stated above are my own and not
   necessarily those of my employer. */


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