Hi Michael,
I have a similar environment and created two RAID 0 lun's of 2 disks
each. The mirroring is done in TSM itself.
I'm more interested in what segment size people use on the disks and if
a certain pp size is recommended for a volume group under AIX.
Good luck
Best Regards,
Oscar
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Michael Green
Sent: 18 February 2009 20:23
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] 4 spindles for db: best performing setup
You are given 4 spindles to place TSM DB on them.
How would you set them up to squeeze maximum performance for DB?
1. Dedicate each spindle for a DBC (result: 3 DBCs, one spindle left
out, nevermind)
2. Create RAID 0 out of each pair of disks. Place a DBC on each RAID
(result: 2 DBCs on two separate RAID 0)
3. Create RAID 1 out of each pair of disks. Place a DBC on each RAID
(result: 2 DBCs on two separate RAID 1)
4. Create RAID 5 out of all spindles. Place one DBC on the RAID
(result: 1 DBC on RAID5)
Notes:
a. There is no RAID 0+1
c. Wasted space is not a concern
--
Warm regards,
Michael Green
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