Re: Limit to number of objects that can be allocated by a job?

A LOT of slowdowns and the slow loss of unallocated storage could be reduced by paying attention to the effects of your routines in programming. Things like only opening a file when you need it, or front-loading a table from a file that serves the purpose (you could even close it after loading the table in memory).

I assume most readers in this thread know this but I've seen what I'm talking about where I have worked.

On 10/27/2024 12:46 PM EDT Charles Wilt <charles.wilt@xxxxxxxxx> wrote:


My thoughts...

If you're exclusively locking ~250 files, you are in fact "restricting" the
system. Just doing so the hard way instead of the easy way by actually
putting the system into a restricted state.

"All or nothing"... is, I suspect, too high a bar. Sure it'd be nice, but
how realistic is it? If you can't go into a restricted state or even
ENDSBS, I assume the system is busy enough that getting a lock on all the
files at once is not going to happen. If by some miracle you do get them,
how are your apps going to handle those object locks?

Personally, if restricted state really isn't an option, then I'd simply
code up something to do them 1 at a time with X number of retries.
A simple CL program or something fancier that you could run multiple copies
of.

At the end, you see what's still left and either free up the objects and
re-run your process or just handle them manually.

I don't know why you need to switch journals, but AFAIK the OS doesn't
require "all or nothing". Having some objects going to new journals while
others go to the old ones, might complicate your restore...but only if you
happen to need to do a restore.

HTH,
Charles

On Fri, Oct 25, 2024 at 5:46 PM Dan Bale <dan.bale@xxxxxxxxxxxxxxxxxxxxx>
wrote:

However, I'd be real curious as to why you need an exclusive lock to

hundreds

of objects at once. That to me seems like a bad idea.

I need to end journaling for ~250 files in several libraries, then start
journaling these same files to new journals. It must be all or nothing,
and I can't take the system to a restricted state or end subsystems. If
there's a better way, I'm all ears (eyes?)

- Dan

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