On Thursday 07 March 2002 01:32 am, Seth Mos wrote: > On Wed, 6 Mar 2002, Anthony W. Marino wrote: > > > If you are looking into using the 3Ware controllers watch the > > > following: The 64xx controllers are underpowered and should better not > > > be used in raid 5 mode. > > > The 74xx controllers seem to be good and should be fine with raid5 but > > > note that raid5 will always have slow write speeds. > > > > Is there a way to minimize the write penalty using both XFS and LVM with > > RAID 5? > > Don't use raid5. I always use a combination of raid 1 and 10 for a > database server. If you have a database that frequently updates records > you don't want the extra write overhead. > > Software raid 1 or 10 will do fine in that case. > If you have 4 disks you make 2 raid 1 arrays and then stripe those in a > raid 0. You then have optimum speed at the lowest possible overhead. > > Generally that is what you want for a database server. > > Cheers > Seth I caught a few emails on linux-lvm list where an external log is being used as well to better write performance. Thanks Alot, Anthony _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
