On 26 Jun 2003, Gregory Leblanc wrote: > On Thu, 2003-06-26 at 01:30, Gordon Henderson wrote: > [snip] > > So now with important machines which had mirrored or RAIDed disk systems, > > I always put swap on a mirrored or RAID5d device. > > Swap on RAID 5 is going to have pretty poor performance, in general. > Swap needs to be both high bandwidth and low latency, both for reading > and writing. RAID 5 just isn't that. I don't actually care right now - these machines are servers and I really don't want them to swap - I'd rather run them without swap at all, but I've yet to see something that'll convince me that this is a good idea, and anyway.. Bonnie might not be the best thing in disk benchmarks, but.. Version 1.02b ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP red 1G 15418 99 68565 37 31359 24 14286 97 150174 84 390.6 1 is fairly reasonable. G - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html