On Wed, 21 Apr 1999, Sebastien Koechlin wrote:
> We are going to buy an Hardware PCI-SCSI Raid Controller
> (because we need to run SCO for 3-4 months) (probably an
> ICP-Vortex which is enought for 2x 9Go) and most of them have
> Cache RAM.
>
> Is there any improvement using a large amount of Cache on the
> controller? I think Linux uses RAM better than a controller
> can, since Linux can map cached pages to any process without
> copying.
[...]
> On the other hand the controller does need some cache to be
> able to process requests. What is the minimum for efficient
> operation?
You don't say whether your primary application(s) will be read-mostly,
write-mostly or even read/write balanced.
If you'll be doing alot of writing, the controller can use it's memory to
coalesce the writes and optimize the parity calculations for writing.
-Andy
Global Auctions
http://www.globalauctions.com
