On Wed, 12 Jul 2006 14:16:37 -0400, Bill Bitner <[EMAIL PROTECTED]> wrote: >I tend not to just look at the hit ratio, but at the >I/Os avoided. 50% hit ratio on 1000 I/Os per second is >better than 90% hit ratio on 100 I/Os per second.
I do the same, but I'd like your thoughts on factoring in the read/write ratio of a guest's I/O's and the extra overhead of cache write inserts (11% is the figure I've seen). I'd like to make approximate calculations of the point at which it benefits an individual guest to stop using MDC. And of course, a read miss followed by an I/O is more expensive than just doing the I/O. Brian Nielsen
