No - the system handles "pages of data", both the syncd data to save and the updated.
(The picture in the Save part of the Info Center makes it clear.
Jobs updating data do not wait, they keep going.
There can be a little drag on a system while it set's the sync.
Jim Franz

----- Original Message ----- From: "Joe Pluta" <joepluta@xxxxxxxxxxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Sent: Friday, March 02, 2012 5:52 PM
Subject: Re: Save While Active

What happens to production jobs, though? If, for example, someone tries
to start a commitment boundary, does it have to sit and wait while the
saves occur? I'm trying to get a feel for how much theoretical pain the
users might feel.



All you really need is *LIB. I suggest you create a message queue to
get all the SWA messages, I usually call mine BACKUP and put it QGPL.
The command would look like:


The device could also be a save file if you use those instead of a tape
device. If a commit gets in the way after 120 seconds that object will
not be backed up and you'll see that in the job log and it will move on
to the next object. I'm assuming you do not have BRMS available to you
but that would make this easier with a one line control group. BRMS
would then handle the SWA processing.

I have update history set to no to keep the regular save processing in
charge of recoverability.

You can check the message queue to see how long the checkpoint takes to
get. If it's more than a minute then you might have some long lasting
updates running.

Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects

On 3/2/2012 4:22 PM, Joe Pluta wrote:
I'm a neophyte when it comes to save while active. I want to save a
smallish production library (under 100GB) during production to replicate
it for testing on another machine. I want to do this daily during
offpeak (but still production) hours. I noticed a couple of options on
the SAVACT: *LIB vs *SYSDFN. Since I'm only saving one lib, *SYNCLIB
seems superfluous.

Anyway, does anyone have any recommendations for using save while
active? I realize this is what it's meant for, but that doesn't mean
there aren't considerations. I'm much more worried about minimizing
delays to production than I am about getting a 100% clean image for the
test machine. Because of that, I'm leaning towards
SAVACTWAIT(*NOCMTBDY) but I'd love to hear other people's experiences.

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