CentOS - Nov 2005 - compaq dl380 raid 5 striping size using built in scsi controllers ??

greetings

pre centos install raid5 setup on a compaq dl380

is asking for stripe size.

16kb
32kb
64kb

i am using one of the built in controllers and the machine has just a gig of
ram and 4 18.2 gig 10,000 rpm drives

machine will be an email server with simple web hosting as well.

suggestions?

thanks

 - rh

--
Robert Hanson - Abba Communications
   Computer & Internet Services
 (509) 624-7159 - www.abbacomm.net

Robert wrote:
>greetings
>
>pre centos install raid5 setup on a compaq dl380
>
>is asking for stripe size.
>
>16kb
>32kb
>64kb
>
>i am using one of the built in controllers and the machine has just a gig of
>ram and 4 18.2 gig 10,000 rpm drives
>
>machine will be an email server with simple web hosting as well.
>
>suggestions?
>  
>
Moving around large files (like a streaming media or file server) will 
likely benefit from larger stripe sizes.  For an email server, 
increasing the size of the stripe over 16k probably isn't going to buy 
you much, if any, performance benefit.  The best way to tell is to 
actually test with your typical data pattern and system load to see 
which provides the best bang.  I'd probably go with 16kb in your 
situation unless you've got time to test and fiddle.

Cheers,