RE: Single-System Independent Auxiliary Storage Pools

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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