ADSM-L

Re: Recovery Log problems

1999-09-01 18:29:54
Subject: Re: Recovery Log problems
From: malkit <malkit AT UDI.CO DOT IL>
Date: Thu, 2 Sep 1999 00:29:54 +0200
What do you meen by " I can restore to a PIT just
before the crash, and I'm up and running smoothly.". Are you doing it from
the last tape with 'todate' option ? If not, how do you do it ?


--
Regards
Regards

Malkit Hayun , UDI
Storage Products Manager
IBM Certified Specialist-ADSM
Office: 972-3-9233440
Fax:    972-3-9233441
Mobile: 972-52-834575
Email: malkit AT udi.co DOT il


"Richard C. Dempsey" wrote:

> I'm running with rollforward on my admittedly fairly small system.
> I am currently working with IBM on a DB corruption problem that
> will crash ADSM whenever I try to BA STG for a certain storage pool.
>
> I have been very happy with roll forward.  I have found that I cannot
> restore to the time of the crash -- it just crashes again!  (This
> has a certain "doh!" quality.)  However, I can restore to a PIT just
> before the crash, and I'm up and running smoothly.
>
> I do mirror my DB and my logs.  I have occasionally lost a volume
> of the DB mirror, but not of the log.  When I lose a DB volume, it
> just varies offline and keeps on running.  When I replace the bad
> volume, things resync and keep on running.
>
> my $0.02 ...
> Rich
>
> At 09:19 PM 9/1/99 +0200, you wrote:
> >Hello,
> >
> >I would like to discuss the following with you:
> >
> >I recommended my customers to work with rollforward. Some of them even
> >have mirroring for their recovery log. The reason was - data integrity.
> >
> >We usually fail to restore the DB to its most current state. The main
> >problem we encounter is that whenever we have a failure on ADSM DB -
> >usually hardware problem it effects the recovery log as well, and we
> >must run point in time backup.
> >
> >Yesterday, one of our customer had a crash on one of the recovery log
> >disks. The recovery log was mirrored to another disk, but ADSM didn't
> >switch to the alternate volume.Both of the volume switched to offline
> >and ADSM crashed. Running 'dsmserv display logvol' we got a message that
> >these volumes are offline. We couldn't load ADSM back - we try extend
> >log, restore DB - which failed as well. Finally we run 'dsmserv format
> >....' and only then we were able to restore the DB.
> >
> >I would like to ask you if any of you work SUCCESSFULLY with
> >rollforward. What is your experience with ADSM DB and RLOG.
> >
> >
> >--
> >Regards
> >
> >Malkit Hayun , UDI
> >Storage Products Manager
> >IBM Certified Specialist-ADSM
> >Office: 972-3-9233440
> >Fax:    972-3-9233441
> >Mobile: 972-52-834575
> >Email: malkit AT udi.co DOT il
> >
> >
>
> Richard C. Dempsey                 email: dempsey AT kodak DOT com
> Public Online Services             pager: 716-975-3539
> 11th Floor, Bldg 83, RL            phone: 716-477-3457
> Eastman Kodak Company              fax:   716-722-3885
> Rochester, NY 14650-2203