Re: HewlettPackard XP 256

Hi Savio, RAID10 is not yet supported in XP256. If XP256 would have support RAID10, it would not make much difference in Performance becuase most of the data will be cached. If you have a 4GB cache in XP256, It will run like a here. ( Obiviously depending on the load on the XP256). If you have XP256 performance manager you can find out the cache hit rates and allocate a particular percentage of cache for read and write. I hope this helps. Regards Aboo Savio Pereira wrote: > Hi Arts! > Where can i get more information regarding RAID10 > > savio > > "Art S. Kagel" wrote: > > > I'd bet that RAID10 will give you 50% better performance than RAID5 and > > 100% more safety for your data.> > > > Art S. Kagel > > > > edem wrote: > > > > > > I've seen article about RAID 5 and Informix goes very bad, and i have > > > question: > > > did anyone have experience with Hewlett Packard XP 256 and RAID 5 and > > > Informix? How are they working together? > > > We have XP256 and RAID 1, and our local HP service said that with RAID 5 > > > we will make 30 % better performance. > > > Disks in XP256 are used only for informix 7.31 databases on HPUX 11.0 > > > (V2500) databases size ~200GB > > > > > > Adam

Wrong! Cache CAN help RAID5 but the performance of RAID10 will STILL blow RAID5 away for Informix use because the sequential reads and writes that Informix relies on are anethema to RAID5. To Savio, Look in the FAQ. Art S. Kagel Aboobacker VADAKKUMURI VALAPPIL wrote: > > Hi Savio, > > RAID10 is not yet supported in XP256. If XP256 would have support RAID10, it > would not make much difference in Performance becuase most of the data will be > cached. If you have a 4GB cache in XP256, It will run like a here. ( Obiviously > depending on the load on the XP256). If you have XP256 performance manager you > can find out the cache hit rates and allocate a particular percentage of cache > for read and write. > > I hope this helps. > > Regards > > Aboo > > Savio Pereira wrote: > > > Hi Arts! > > Where can i get more information regarding RAID10 > > > > savio > > > > "Art S. Kagel" wrote: > > > > > I'd bet that RAID10 will give you 50% better performance than RAID5 and > > > 100% more safety for your data.> > > > > > Art S. Kagel > > > > > > edem wrote: > > > > > > > > I've seen article about RAID 5 and Informix goes very bad, and i have > > > > question: > > > > did anyone have experience with Hewlett Packard XP 256 and RAID 5 and > > > > Informix? How are they working together? > > > > We have XP256 and RAID 1, and our local HP service said that with RAID 5 > > > > we will make 30 % better performance. > > > > Disks in XP256 are used only for informix 7.31 databases on HPUX 11.0 > > > > (V2500) databases size ~200GB > > > > > > > > Adam