Re: logical log tape reuse
In article <332edaf3.684639814@news.netline.net>, Allen Jantzen
<allenj@ndr.com> writes
>
>OK, so I am backing up logical logs (ontape -c) to dat device 1
>
>Then, while this ontape -c process is still running, I do a full
>archive (ontape -s -L 0) to dat device 2.
>
>Question: When the full archive is done, does dat device 1
>rewind to the beginning of tape, since all the logical logs already
>there are now unneeded? Or does it just keep on going, oblivious to
>the full archive?
>
>Or, more succinctly: When backing up logical logs to dat, do you just
>keep sticking new tapes in as they are needed and labeling them so
>that, in a restore, you know which ones to provide (based on log
>numbers)??
>
Yes.. but you can reuses tapes once you know you will not need them
it is up to you to determine this and make sure you do not overwrite
a tape you will need.
>Or, do the tapes holding logical logs somehow get reused as subsequent
>full archives to the archive tapes make them obsolete? This second
>scenario obviously seems more likely, but how does it happen???
>
>I have read TFM repeatedly and I just can't see how this works.
>-----------------------------------------------------------------
>In addition, when using a single dat device to back up _both_ archives
>and logical logs:
>When I do a full archive (ontape -s -L 0), and assuming that logical
>logs won't need to be backed up during the full archive, am I to eject
>the logical log tape and replace it with the archive tape, all while
>ontape -c is still running?? Should I stop ontape -c with a CTRL-C???>
Stop the ontape -c,
Wait until Program is over message appears and tape stops moving.
Put the archive tape in and do the archive
Put a new logical log tape in and do an ontape -c again.
>Any help appreciated.
>
>Allen W. Jantzen, DBA
>Ned Davis Research
>allenj@ndr.com
>
>PS - I think I accidentally posted a few duplicate (already answered)
>forum messages with this new Agent s/w that I am using. Please
>forgive the wasted bandwidth.
--
David Williams