Re: Guest Partition Storage Configuration

Hi Jim

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> wrote:

Evan,

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,
manage storage.

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.