ADSM-L

Re: HACMP and ADSM

1999-06-03 13:42:49
Subject: Re: HACMP and ADSM
From: Dwight Cook <decook AT AMOCO DOT COM>
Date: Thu, 3 Jun 1999 12:42:49 -0500
     Actually... well I'd put some thought into it but here is what has
     developed over the years at Amoco (now BP-Amoco)

     OK, we pump our data first into big diskpools, then migrate to tape.
     Using SSA drives and their ability to have the "Higher availability"
     configuration (two different ssa cards driving the loops, naturally
     they were installed into different busses within the processor) so
     having the DB & LOG mirrored (via adsm) across different loops which
     were protected via dual ssa cards, across different busses... ADSM was
     set to run under conditions that would actually prevent the processor
     from running (wouldn't the processor die if it lost one of its
     internal busses ? ? ?)

     Now... we have 12 production ADSM servers (using 6 3494 ATL's) in 4
     locations across 3 states.  If by some freak of nature we were to have
     an adsm server's processor crash (as to this date that has never
     happened) we would simply register the client on one of the other adsm
     servers and be good to go, if it is a critical situation and the
     backups MUST run right then (such as the archives of our SAP
     environments)

     Now you ask... what if a processor dies and you require a
     retrieve/restore? ? ?

     If it were that critical (actually, IBM could probably have the
     processor fixed prior to this next action being completed) I figure
     the adsm data base could be loaded on a/the other adsm server which
     shares the ATL and brought up as a second ADSM instance on "that"
     server which would then give access to the data on 3590 tape.

     Summary : having an ADSM backup environment available is critical...
     but my view is if you're going to dedicate two machines to it you
     might as well use both all the time, allowing one to "cover" in the
     event of a failure of the other.

     just my 2 cents worth

     Dwight


______________________________ Reply Separator _________________________________
Subject: HACMP and ADSM
Author:  clarence (clarence AT ZA.IBM DOT COM) at unix,mime
Date:    6/3/99 9:03 AM


Hi There........

Does anyone out there have any experience on ADSM in a HACMP environment.
e.g. Implementations, recommendations, tips, etc.................


Thanks in advacnce.

   Have a nice day
   Clarence Beukes
   IT Specialist (Storage Solutions)
   IBM Product Support Services
   Tel : +2711 302 5333   Fax : +2711 302 8209
   Mobile : +2782 573 5665

"The success of men never lies in falling, but in falling and rising up
again."
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