RE: Save-while-active questions / concerns

["Chuck Lewis" <clewis@xxxxxxxxxx>]

Dave,

We don't use Save-while-active, but one thought that comes to mind in our
environment is killing TCP knocks off all of our remote controllers and thus
report spewing printers. I know that restarting it reconnects everything
(normally) but we have line printers that that would affect. We don't use
anything like Showcase (SMALL company) so killing QINTER and some vendor
subsystems does the job for us.

We are on a new 810 now with the IBM 3581-H23 Tape Unit that SCREAMS so
backups are a blip (now) :-)

Chuck

Chuck Lewis
Manager of I.T.
Lee Supply Corp.
Indianapolis, IN


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of David A Parnin
Sent: Tuesday, December 16, 2003 2:50 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Save-while-active questions / concerns

Greetings everyone,

For our daily backups we have traditionally killed QINTER and another
subsystem or two, done the save's, then IPLed.  Awhile back I removed the
IPL and added code to restart what was shut down.  I am now getting ready
to implement save-while-active to reduce the downtime window even more.  I
don't have a problem with monitoring for when the checkpoint has been
established and restarting things but I do have a couple of questions.

How close to a restricted state does the system need to be to establish a
good checkpoint?  In the past even though QINTER was down there was still a
subsystem with some never-ending EDI jobs.  I assume that needs to be ended
to get a good checkpoint.  Perhaps a bigger concern is with ODBC jobs.  We
have a number of users that use Showcase queries.  They don't appear to
lock the files.  Should those be addressed?  I doubt that we've got anybody
using FPT or Telnet but should I end TCP/IP just to be safe?

I'm also concerned about the SAVACTWAIT parameter.  I want to avoid objects
being skipped.  Given that it has a 2 minute wait time per object if they
are in use this could add up if I happen to miss a couple of things.  In
case it matters we are at V5R1.  I was planning on using the *SYNCLIB
option.  I've read through the archives but didn't see these things
addressed.

Any thoughts would be appreciated.

Dave Parnin
Nishikawa Standard Company
Topeka, IN  46571
daparnin@xxxxxxxxxxxxxxxxxx


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