Re: Informix and RAID?

Test IT wrote: > > The folks from Informix told me that running Informix on a box in a > RAID configuration is not the best idea. They say that performance > drops. Is anyone running Informix 7.11 or > on a RAID box? We're > talking less than 100 tps and less than 20GB of data. If you > converted from not RAID to RAID, did you see a big performance drop? > This has been discussed recently. I am not sure whether you can get back those old news posts. Most of the informix experts participate in the informix news group recommend not to use RAID-5. However, we are using it for most of our servers, yet we don't see the problem with RAID-5. For Sparc 20s, we are using fiber channel and its speed is 25MB in one direction, and the fiber channel supports bi-directional data transfer -- maybe this made the difference. For Sparc 2000E, we are using EMC's Symmetrix whose RAID-5 is a priprietary format named RAID-S. RAID-S is completely transparent to the system administrator. Whatever your regular performance you already have will not be degraded. We didn't *convert* from non-RAID-5 to RAID-5. We only have one system that do not have RAID-5, but we are going to convert it whenever our new disk arrary arrives. Maybe there is a performance difference, but it is not noticable to us. Chao