Re: Question about storage pools

Charles

Pools are not created on their own, they are created when a subsystem is started that has a pool or pools defined in it. These can be any of the predefined pools that you see in the WRKSHRPOOL display, including the several shared pools. You can also define fixed-size pools. You do this when you CRTSBSD, and each subsystem description can have up to 10 pool definitions. These are opened when the subsystem starts.

You can make certain kinds of work go to a specific pool in the subsystem - this is done with routing entries - option 7 in DSPSBSD will show you the entries, in CHGSBSD lets you change them. This is more complicated - in a job description or the SBMJOB command you can specify something called routing data - when you put a job on a job queue, it is attached to a subsystem. Then the routing data is compared to values that are set in the routing entries. Each routing entry points to a pool ID for the subsystem, so the jobs go where you tell them to.

For full information you should probably go to the Work Management manual at InfoCenter, but basically you need to create the subsystem, add pool definitions, add job queue entries for batch work, work station entries for interactive, add or change routing entries. Other stuff is for special kinds of work, like host servers, etc.

File opening and closing has nothing to do with storage pools. Pools are just a managed memory resource - controls the boundaries in memory where jobs can run. File IO and management is independent of this. As another post said, once data is in memory, wherever, it is usable by all jobs on the system. Pools, to my thinking, are more about controlling executable code and job-specific settings and attributes - they are not globally accessible.

HTH
Vern

-------------- Original message --------------
From: "Charles St-Laurent" <dringpiece@xxxxxxxxxxx>

Hi!

I'm not I understood the Storage Pool concept. So I prefer to ask some
questions.

If I undestood it correctly, I can create a new subsystem on our iSeries and
link this new subsystem to a user-defined storage pool. But can we create a
used-defined storage pool and then ask a job running in intercative or batch
mode to use this specific storage pool?

Another question: if I run a program that opens database files in a storage
pool and don't close the files, and then runs interactive or batch jobs
using that pool, will these jobs re-open database files or will they reuse
the open path that is supposed to be already opened?


Charles St-Laurent
Consultant Berco
Technologies
Industrielle Alliance, Assurance auto et habitation
Téléphone : 418 650-4600, poste 3216
Sans frais : 1 800 463-4382
Télécopieur : 418 650-4612
Sans frais : 1 877 650-4612
Courriel : charles.st-laurent@xxxxxxx
www.inalco.com/assurancegenerale


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