Thanks for the response.
Part of the reasoning for separating the IO was due to performance
issues seen on other guests; we were looking at a minimum of 4 drives
for the application servers, not just one or two (not sure if I had
made that clear).
Following on from your response, is there any rule of thumb as to how
many to create, or what sizes to make the storage spaces ?
Making one large storage space will create I/O problems of it's own if
what my IBM resource has told me is accurate.
Do you have any best practise guidelines for this aspect ?
On Wed, Jun 22, 2011 at 11:37 PM, Jim Oberholtzer <midrangel@xxxxxxxxxx>
Based on your description of the situation, I think most will agree that
best practice would have you create your storage spaces in SYSBAS. If
you isolate the drives for the storage spaces you will degrade the I/O
capacity to a point where I wonder if the performance of the guest
partitions would be sufficient. Allow IBM i to do what it does best,
If you had an iASP that had many disk units in it to eliminate the I/O
issues, then you could consider that. For now I would create the
storage spaces as needed and let them do their thing.
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