Re: BRMS sometimes saves entire IFS

Yes from what read. I think that the tape where you save *LINK fully, expires earlier than 7 days and BRMS detects this and forces full save of *LINK. Check your media policy, or is something is manually expiring the tape.

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From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> on behalf of Joe Pluta <joepluta@xxxxxxxxxxxxxxxxx>
Sent: Friday, April 17, 2020 9:18:42 PM
To: midrange-l@xxxxxxxxxxxxxxxxxx <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: BRMS sometimes saves entire IFS

Yes. The control group has "IIIIIFI" in the weekly activity parameter,
so is intended to only do a full save on Saturday. As to expiration
dates, we're starting to get into areas where I don't know a lot.
Looking at the tapes in the Work With Media display, it looks like they
expire in two months, but there's a lot in that display that isn't
intuitive to me.

It seem that you're implying, though, that the expiration date on a tape
could affect whether the *LINK save is incremental or full. That's a
lot to wrap my head around.

Hi Joe,

Do you use the same control group when you do the incremental and when the full save happens unexpectedly?
How many days do you keep the tape with the full *LINK before it expires?

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From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> on behalf of Joe Pluta <joepluta@xxxxxxxxxxxxxxxxx>
Sent: Friday, April 17, 2020 7:45:21 PM
To: midrange-l@xxxxxxxxxxxxxxxxxx <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: BRMS sometimes saves entire IFS


Thanks, Jack! I'm getting my information from DSPLOGBRM. Well, also
from DSPLOG QHST because it's easier to compare that specific message
day over day. I'm pretty sure it's the same control group; a scheduled
job runs the same BRMS command every day. I just don't get it. I'll
look at PRTRPTBRM when I get a chance and see if it tells me anything
additional.


On 4/17/2020 12:25 PM, Jack Kingsley wrote:

Joe, maybe you could track it down using the dsplogbrm command or try the
prtrptbrm. Maybe your running some other jobs that are using different
types of control groups.

On Fri, Apr 17, 2020 at 9:45 AM Joe Pluta <joepluta@xxxxxxxxxxxxxxxxx>
wrote:

<LOL> You and me both, Kevin. I read that several times this morning
and even got a cup of coffee and tried again, but I couldn't find any
explanation in there either.

On 4/17/2020 8:33 AM, Kevin Bucknum wrote:

<

https://www.ibm.com/support/pages/why-brms-saves-more-data-expected-when-saved-ifs-link-lists
https://www.ibm.com/support/pages/why-brms-saves-more-data-expected-when-saved-ifs-link-lists

That seems to talk about when it decides to do a full or incremental,

but I must be dense today. It doesn't seem to me like it explains how it
decides.

On Fri, 2020-04-17 at 08:18 -0500, Joe Pluta wrote:

Yes, we're researching reducing SAVSECDTA time. That will involve

switching to authorization lists (which we should be doing anyway), but

that project hasn't been scheduled yet. This IFS issue is a different

issue that has been happening infrequently for some time now. And

looking at the logs, I don't understand it at all.


We've got this in our backup:


Auxiliary Weekly Incremental Full Retain

Save List Storage Activity Media Media Object

Item Type Pool Device MTWTFSS Policy Policy Detail

*LINK *ALLAVL IIIIIFI DAILY DAILY *YES


But from what I can tell, the system did a complete IFS save on 3/23,

3/27, 3/30, 4/06, 4/10, 4/13 and today, 4/17. I only base that on the

number of IFS objects saved (2 million vs a few thousand). I cannot

tell from the logs which type BRMS attempted. Weirdly, it doesn't seem

to me that it is EVER doing a complete IFS backup on Saturdays (3/21,

3/28, 4/4, 4/11).


4/13 was unusual in that it was an ad-hoc mid-month save during the

day. The rest all occured during our overnight processing, in which the

IFS *LINK portion usually kicks off around 2AM (unless SAVSECDTA goes

long).

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