RE: RAID5 - to split or not to split

2001-06-10 Thread Christopher Spence
Static data raid 5 is a very good option, it has great read performance and very inexpensive. Walking on water and developing software from a specification are easy if both are frozen. Christopher R. Spence Oracle DBA Fuelspot -Original Message- Sent: Friday, June 08, 2001 6:20 PM

Re: RAID5 - to split or not to split

2001-06-10 Thread Mogens Nørgaard
Since RAID5 means that data is striped, of course read performance is OK. As soon as you talk write performance, however, RAID5 becomes something of a joke since it was invented back in the 70's to offer a cheap alternative to the fast, extremely expensive disks offered by IBM back then. So the

Re: RAID5 - to split or not to split

2001-06-10 Thread Jared Still
On Sunday 10 June 2001 16:15, Mogens Nørgaard wrote: It becomes really absurd when you look at the SAN offerings on the market. For instance, IBM's Shark only offers the customer the choice between JBOD (Just a Bunch Of Disks, ie., Non-RAID) and RAID5. IBM has a red book out regarding this

RAID5 - to split or not to split

2001-06-08 Thread Gary Weber
All, 9 drives + hot spare Would you stripe 6 for data and other 3 for indexes, or use one 9-drive volume for both? One side of me says the more spindles the merrier - keep them together, the other side says - separate data and indexes. The third, evil SA side is waiting for the first two to

RE: RAID5 - to split or not to split

2001-06-08 Thread Christopher Spence
What about redo logs, rbs, temp, system, exe's? Number of spindles doesn't necessarly mean faster performance. Depends on the data and the controller. If you set 6 disks with 64 Kb stripe size, your stripe width is 384 Kb with Raid 0. If your not using a write-back caching controller, you