On Wednesday 28 May 2008 11:14:50 am Justin Krejci wrote: > http://download.intel.com/support/motherboards/server/srcsas18e/sb/axxrpcm2 >_ tps_10.pdf > > Benefits are identified in this PDF. > Data caching (write-back cache can greatly improve write performance) > > Busy databases servers commonly need lots of I/O > > Also consider running RAID10 if you have drive availability (4 drive > minimum) as you will get much higher I/O performance with that as well > especially with writes. Though if you need the capacity, RAID5 will give > you one drive more of capacity. RAID10 can also give you a smaller chance > of data loss due to drive failures as you can potentially lose up to half > of your drives and still operate whereas using RAID5 and losing 2+ drives = > disaster. > Somewhere a DBA just rolled over in his grave at the mention of a database using RAID 5. If you're ever going to care about performance at all don't use RAID 5. It's particularly slow at the sorts of write I/O database systems typically generate. -- Thanks, Josh Paetzel PGP: 8A48 EF36 5E9F 4EDA 5A8C 11B4 26F9 01F1 27AF AECB -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 195 bytes Desc: This is a digitally signed message part. Url : http://mailman.mn-linux.org/pipermail/tclug-list/attachments/20080528/c58715d1/attachment.pgp