How to verify ontape archive without restoring?
Jonathan, on IDS 10.00FC4X5 with a 1TB database and weekly level 0 ontape archives, asked how to verify an archive without a full restore. Art Kagel pointed to archecker, which verifies that every page, including preimages, is on the archive, and is better than a test restore because ontape in Online 5.x could miss pages. Jonathan confirmed it works, though it takes as long as the backup.
Auto-generated by Claude from the posts below — may be imperfect; read the full thread.
Hi. We are using IDS 10.00FC4X5. We have a database that is just over 1
terabyte in size, and we do a level 0 archive of it weekly using ontape (we
never do level 1 or 2).
I was wondering if there was a way to verify the archive without doing a full
restore of the tape. Mostly because it's very time consuming to do so, but
also because we don't really have anywhere to actually do the restore into. So
is there some special "tape verify" command, or could I restore a couple
DBspaces somehow--and if I did this, would I need a database of the same time
to do so?
Just looking for some ideas. Thanks in advance.
Jonathan
Check out archecker, that's it's primary purpose, to verify and validate an
archive.
Art S. Kagel
Oninit
On Wed, May 21, 2008 at 1:07 PM, JONATHAN WILLIAMS <
jonathw@shubertticketing.com> wrote:
> Hi. We are using IDS 10.00FC4X5. We have a database that is just over 1
> terabyte in size, and we do a level 0 archive of it weekly using ontape (we
> never do level 1 or 2).
>
> I was wondering if there was a way to verify the archive without doing a
> full
> restore of the tape. Mostly because it's very time consuming to do so, but
> also because we don't really have anywhere to actually do the restore into.
> So
> is there some special "tape verify" command, or could I restore a couple
> DBspaces somehow--and if I did this, would I need a database of the same
> time
> to do so?
>
> Just looking for some ideas. Thanks in advance.
>
> Jonathan
>
>
>
>
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> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>
Thanks for the help. The archecker utility definitely seems to do the trick. It's unfortunate that it takes as long to verify as the backup takes, but I guess there's no way around that. Thanks again Jonathan
Archecker is actually better than using a restore to check the archive. A
successful restore doesn't guarantee that the archive didn't miss any
pages. Archecker verifies that every page that's supposed to be on the
archive is in there including the preimages of pages modified during the
archive. It was years before anyone realized that in Online version 5.01
through 5.07 ontape was missing pages if the server was busy. There was no
archecker than and many of us did restore testing and never figured it out.
On Thu, May 22, 2008 at 11:49 AM, JONATHAN WILLIAMS <
jonathw@shubertticketing.com> wrote:
> Thanks for the help. The archecker utility definitely seems to do the
> trick.
> It's unfortunate that it takes as long to verify as the backup takes, but I
> guess there's no way around that.
>
> Thanks again
>
> Jonathan
>
>
>
>
*******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>
--
Art S. Kagel
Oninit (www.oninit.com)
IIUG Board of Directors (art@iiug.org)
Disclaimer: Please keep in mind that my own opinions are my own opinions and
do not reflect on my employer, Oninit, the IIUG, nor any other organization
with which I am associated either explicitely or implicitely. Neither do
those opinions reflect those of other individuals affiliated with any entity
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