Thank you Wanda for your response. I really do appreciate it.

Angel

   -----Original Message-----
   From:       PrathW1 [SMTP:PrathW1 AT CENTRAL.SSD.JHUAPL DOT EDU]
   Sent:       Monday, October 25, 1999 4:43 AM
   To:         ADSM-L
   Cc:         PrathW1
   Subject:    Re: ADSM DB and Recovery Log.

   > Is the recovery log portion of the ADSM database kept or backup
   > somewhere else? For rollforward?
   >
           [Prather, Wanda]
           When you run a DB Backup, the log is cleared ( I think except
   for
   transactions still in flight.)
           So all the information you need for a restore is on the DB
   backup
   tape.

   > If the ADSM database is restored, is the log also restored? Will I
   > lose the RollForward benefit then?
   >
           [Prather, Wanda]  If you are using ROLLFORWARD mode, when you
   restore your DB from a backup tape, the entries still in the log are
   used to
   update the restored data base.  These would be entries created
   between the
   time your DB backup tape was made and the time your data base
   crashed.  So
   ROLLFORWARD would let you bring the data base up to current time,
   where as
   NORMAL mode you can only recover up to the time of the DB backup tape
   you
   use to restore.

           Normally this is only going to work for you in the case of an
   on-site DB restore, say because of a disk crash, where you have your
   logs
   available.  In an off-site/disaster recovery situation, you will
   restore
   from the last DB backup tape you have available, and not roll forward
   from
   the logs, which presumably burned down along with your data center
   ...

           When you actually restore a DB, the log is reformatted and
   cleared.


   > Can I restore the ADSM DB using a deleted DB backup tape from
   > offsite that was created in January,1999?
   > On a daily basis we run the command (del volh tod=today-7 tot=now
   > t=dbb).

   >  [Prather, Wanda]    Assuming it has not been overwritten, yes.
   You just
   > specify the VOLSER on the DSMSERV RESTORE DB command.   Syntax is
   in the
   > ADSM admin reference.
   >
   >
   >
   > Last but not least, is there an ADSM class that devotes discussion
   > of the ADSM database(restore/disaster recovery)?
           [Prather, Wanda]  Sorry, don't know.  I did OJT.
   >
   >
   >
   >



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