Re: Informix on Raid 5

Posted in 1997

David Williams — Mon, 3 Feb 1997 21:06:15 +0000 — source: Informix-list mailing list archive (1991-1998)

In article <01bc0fdb$eeed12e0$1d6a93c0@dashforcash.chrims.com>, * <smitty@chrims.com> writes >Hello > I have a question regarding increased performance from the informix engine >when used on a RAID 5 system in a sco unix environment. My programmers tell >me that the system would be faster useing a multidrive config. than with >Raid. Please respond with any experiences or knowledge regarding this >subject. > I believe RAID 5 is the version which has very poor write performance. This is because all of the parity info is stored on one disk. This means that EVERY write involves one write to the parity disk. You would get better peformance with RAID 1 (i.e. mirroring) where not all writes involve writing to the same disk drive which becomes a bottleneck. -- David Williams