Re: Informix Online 5 running on RAID5

Clem Akins (cwakins@leia.alloys.rmc.com) wrote: : > We are preparing to implement 3 Informix Databases on a DEC Alpha with a : > RAID5 Array configuration. : > : > Does anyone have any comments regarding performance of RAID5 with : > Informix Online ver 5 verses a RAID 1 or 0 configuration? especially with : > OSF/1 ver 3.0 : RAID5 works pretty well for us, performance-wise. The main advantage is : that we get to have the redundancy of 2n disks with n+1 disks. Why aren't : you using 7.1? It has many tools that let the DBA enhance performance, : though most of them are lost if you use RAID5. Not necessarily. If you have >1 ranks of RAID5, you can configure each rank as you would a disk volume. One particular customer has 12 ranks of RAID5 on 6 controllers. With deliberate fragmentation of tables under 7.1, you can get excellent performance using the engine's parallel features. ___ ___ Senior Consultant / ) __ . __/ /_ ) _ _ __ Informix Software Inc. (303) 850-0210 _/__/ (_(_ (/ / (_(_ _/__) (-' ~/ '(_- 5299 DTC Blvd #740 Englewood CO 80111 dberg@informix.com Opinions expressed herein are my own.