On Tue, 2002-10-29 at 11:31, Andrew Sullivan wrote:
> On Tue, Oct 29, 2002 at 09:10:31AM -0800, Josh Berkus wrote:
> >
> > Out of curiousity, what is it with RAID 5? I've encountered the poor
> > write performance too ... any idea why?
>
> It largely depends on the controller and te implementation. It has
> to do with the cost of calculating the checksum. If the
> implementation of that is inefficient, the writes become inefficient.
A high-quality smart controller with lots of cache RAM definitely
negates the RAID5 performance issues.
(Of course, I'm referring to enterprise-level rack-mounted h/w
that costs big bucks...)
--
+------------------------------------------------------------+
| Ron Johnson, Jr. mailto:ron.l.johnson@cox.net |
| Jefferson, LA USA http://members.cox.net/ron.l.johnson |
| |
| "they love our milk and honey, but preach about another |
| way of living" |
| Merle Haggard, "The Fighting Side Of Me" |
+------------------------------------------------------------+