Re: Guest Partition Storage Configuration

[Jim Oberholtzer <midrangel@xxxxxxxxxx>]

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.

Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


On 6/21/2011 5:20 PM, Evan Harris wrote:
> Hi All
>
> I'm looking to create a couple of guest partitions on a customer box
> and I'm wondering how best to go about configuring the storage.
>
> The partitions are intended for use as "application servers" in a JDE
> environment and require about 500gb each.
>
> Is it better to:
> - isolate the storage space(s) on to some specific disks by
> configuring a user ASP and then creating the storage space(s) in that
> ASP
> - just create a bunch of storage spaces in the system asp rather than
> trying to isolate the IO
> - what are the effects of creating one storage space vs a number of
> storage spaces vs isolating in an ASP
> - some other variation (like forgetting the ASP idea entirely
>
> Isolating the storage spaces in an ASP seems to offer some recovery
> advantages as well, but I;m not sure whether this outweighs whatever
> disadvantages they might also create.
>
> I'm not sold on any particular approach as yet, I'm just trying to get
> some perspective/opinion from people who've done this in the real
> world.
>
> if you've implemented a guest partition(s) how did you do it and what
> would you do differently ?
>
> -- Regards Evan Harris http://www.auctionitis.co.nz