Re: Single-System Independent Auxiliary Storage Pools

Paul: Very true. Additionally Zend Server and WAS have a difficult time
with iASP as well.

That said I like iASPs (have since they came out) and use them as
appropriate.

I was typing a response that was almost identical to Larry's when I saw his
so I discarded that version, but I too have a partition that is just for
hosting smaller DASD units specifically to provide storage for these types
of situations.

Remember the drives in an iASP can be part of any RAID set so they do not
loose storage just to mirroring or RAID, just use what you already have set
up.



Jim Oberholtzer
CEO/Chief Technical Architect
Agile Technology Architects

On Wed, Dec 6, 2017 at 2:08 PM, Steinmetz, Paul <PSteinmetz@xxxxxxxxxx>
wrote:

Con
Not all 3rd party vendors support running outside of the system asp.

On our R&D LPAR, I've been using user asp 02, (not IASP).
This is when I discovered some apps must run in system asp.


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Evan Harris
Sent: Wednesday, December 06, 2017 3:52 PM
To: Midrange Systems Technical Discussion
Subject: Re: Single-System Independent Auxiliary Storage Pools

It would probably help if IBM re-branded IASPs as database containers

On Thu, Dec 7, 2017 at 9:41 AM, Nathan Andelin <nandelin@xxxxxxxxx> wrote:

I've been reading about IASPs at:

https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_73/
rzaly/rzalypdf.pdf?view=kc

Along with reading archived discussions.

IASPs are fundamental component of PowerHA and Geographic Mirroring.
But what about using them alone on a single system? Are there pros and

cons?

The biggest con appears to be that they require a disk drive (2 for
mirrored protection), for each IASP. A case could be made to enhance
IBM i to support small internal virtual disks.

A number of use cases come to mind.

1. Reduce IPL time by separating application IASPs from SYSBAS.
2. Reduce SAVSYS time by separating application IASPs from SYSBAS.
3. Host multiple versions of applications by dividing them between IASPs.
4. Host an open-source project and external developers on an IASP
(easy to secure).
5. Use an IASP version of your application to create an installation
package.

Can you think of IASP pros and cons, compared to separate libraries
and directories, or compared to LPARs?
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Evan Harris
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