We have an IBM v7000 SAN. It has 24 physical disks. Each physical disk is 136GB in size. The disks are grouped into 3 RAID 5 arrays and assigned to one storage group and hence one volume. This volume is assigned to the AIX host. The AIX admin can now create single or multiple hdisks from this volume for DB2 use.
Env: DB2 v9.7 fp7, on AIX 7.1
The question is, should we have
- one large hdisk1 for example, create 3 filesystems on this, one each for db2 data/temp/log filesystems on this one hdisk1 (underneath is 24 physical disks)
- multiple hdisks, for example, hdisk1, 2, 3 and create db2 data filesystem in hdisk1, logs in hdisk2 and temp in hdisk3. (underneath is the same 24 physical disks)
What is better? Is there any advantage to either approach?
Thank you
Env: DB2 v9.7 fp7, on AIX 7.1
The question is, should we have
- one large hdisk1 for example, create 3 filesystems on this, one each for db2 data/temp/log filesystems on this one hdisk1 (underneath is 24 physical disks)
- multiple hdisks, for example, hdisk1, 2, 3 and create db2 data filesystem in hdisk1, logs in hdisk2 and temp in hdisk3. (underneath is the same 24 physical disks)
What is better? Is there any advantage to either approach?
Thank you