Re: Mirrored DELETE DBVOL, LOGVOL?
2002-05-10 04:24:47
Roger,
I agree, I also feel very uncomfortable living without a mirror, even
for a limited time. The admin interface should be enhanced to allow for
distinguishing between removing a DBCOPY from deleting the entire DBVOL
including all mirrors (and hence moving the contents while all mirrors
are in place).
In the past, I have always added the new volume as a mirror first,
then deleted an old copy, then added a new mirror, ...
Since this procedure does not allow changing the volume size, the volumes
on my nearly 8 years old server are now much too small. The necessary
consolidation exposes me to the danger described by you, so I'm
hesitating ...
Roger Deschner <rogerd AT UIC DOT EDU> schrieb:
> Oh, I guess it's just my paranoid mind at work again, but DELETE DBVOL
> scares me. I'm using it to migrate the TSM Database from old disks to
> new, faster disks.
> So, I attached the new dbvol and its mirror, fiddled with EXTEND DB and
> REDUCE DB to make it right, and did DELETE DBVOL on the old mirror. Then
> I did DELETE DBVOL on the old primary copy.
> Oops! Now I'm really exposed! There is only one copy of the old database
> volume, while this rather lengthly copying process proceeds.
> Is there any way to do a DELETE DBVOL in a mirrored way - that is delete
> all mirrored copies of a DBVOL at once, so that if a disk crashes in the
> middle of it, I will not lose my Database? That's the whole point of
> Database mirroring, isn't it?
> I'm starting to think AIX JFS mirroring might have some advantages over
> TSM Database/Log mirroring.
> Roger Deschner University of Illinois at Chicago rogerd AT uic DOT
> edu
--
Reinhard Mersch Westfaelische Wilhelms-Universitaet
Reinhard Mersch Westfaelische Wilhelms-Universitaet
Zentrum fuer Informationsverarbeitung - ehemals Universitaetsrechenzentrum
Roentgenstrasse 9-13, D-48149 Muenster, Germany Tel: +49(251)83-31583
E-Mail: mersch AT uni-muenster DOT de Fax:
+49(251)83-31653
|
<Prev in Thread] |
Current Thread |
[Next in Thread>
|
- Mirrored DELETE DBVOL, LOGVOL?, Roger Deschner
- Re: Mirrored DELETE DBVOL, LOGVOL?,
Reinhard Mersch <=
- Re: Mirrored DELETE DBVOL, LOGVOL?, Davidson, Becky
- Re: Mirrored DELETE DBVOL, LOGVOL?, Kent Monthei
- Re: Mirrored DELETE DBVOL, LOGVOL?, Zlatko Krastev
- Re: Mirrored DELETE DBVOL, LOGVOL?, Roger Deschner
- Re: Mirrored DELETE DBVOL, LOGVOL?, Zlatko Krastev
|
|
|