Re: RAID level suggestions

tsmith_at_cyberus.ca (Tolson Smith) wrote:

]
]I am in the process of setting up our new UNIX enviornment and I have a
]question about RAID levels and what people's suggestions are.
]
]Currently I have a Oracle database (7.1.6.2) on OpenVMS on a RAID drive level
]0+1 that is approximately 4GB.
]
]Given that some RAID level will be run in our organization I am looking for
]recommendations of what level the actual data should be put on. I recognize
]that the RollBack segments, temporary space and the redo logs are write
]intensive and there for should not most likely be located on the same drive as
]the data. We currently are doing approximately 12 to 15 % write activity and
]the rest is reading.

I have set up our system with a combination of RAID levels. Rollback segs and redo logs are on mirrors. Logging, software and prod database are on RAID5, and reports, test databases, misc files are on stripes or plain concat volumes.

Your setup depends on how many physical disks you have. You need at least 4 to run RAID5, then probably 4 others, 2 for the rollback seg mirror and 2 for the redo log mirror.

It all depends on the load too - you might be able to get away with less.

George Dau
gedau_at_mim.com.au Received on Fri Mar 22 1996 - 00:00:00 CET