Look at increasing the “delay
on multiplexed restores” on the media server and also increasing the number
of channels being allocated in the rman restore script.
From:
veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Reynolds,
Susan K.
Sent: Wednesday, November 04, 2009 12:55 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Oracle restore question
We have a group of DBAs running a restore and I was
wondering if there was something in the way they kicked off their restore that
caused the following:
“They initiate restore, tape is loaded, image is
restored, tape is returned to slot in the library…then restore moves to
the next image…goes back…loads the same tape, restores the images,
tape is returned to slot in the library.”
Is there something on the Oracle side that needs to be
specified that says, “load tape, restore ALL the relevant images on the
tape (without unloading and reloading it again in a drive), then go to the next
tape when the restore is completely done with the images on the first tape.”
This loading and unloading is adding 3-4 minutes to the
restore of each image.
Are there any oracle experts out there who understand why
this is happening (so we’ll know for the future and it will not be such a
time-consuming process)?
