RE: RMAN question(s)

  • From: "Robert Freeman" <robertgfreeman@xxxxxxxxx>
  • To: <Brandon.Allen@xxxxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
  • Date: Tue, 2 Oct 2007 21:02:24 -0600

Quite a nice improvement there! I would caution everyone to carefully test
of course, but it seems to have worked well here. I would expect that
recoveries may well go faster too.


Robert G. Freeman
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-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Allen, Brandon
Sent: Tuesday, October 02, 2007 5:04 PM
To: robertgfreeman@xxxxxxxxx; oracle-l@xxxxxxxxxxxxx
Subject: RE: RMAN question(s)

Just an update on this - after running the compressed backups on this
database and another one for 3 weeks now, they are consistently running
much faster than before the compression - a little less than half the
time they used to take, and the size of the backups is consistently
reduced by about 87%.  Pretty nice, thanks for the tip Robert!

Now to test the restores before I implement on my production database .
. .

-----Original Message-----
From: Allen, Brandon

In case anyone is interested - I did a test of the 10g "as compresssed"
backupset on a 285GB databases and here are the results:

W/O Compression: backup size = 280GB, backup time = 2 to 10 hours with
an average of about 7.5 hours over the past 3 months (this goes to a
disk staging area and later to tape on a Netbackup server with a LOT of
other backup activity so there is a wide variance in backup times
depending on what else is running at the same time)

W/ Compression: backup size = 36GB, backup time = 2.9 hours (only tested
once so far)

Environment: AIX 5.3, Oracle, Netbackup 5.1 MP4, BaanIV ERP
application data

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