Rman does not use all of the allocated channels

From: Schauss, Peter <peter.schauss_at_ngc.com>
Date: Thu, 28 Jul 2005 13:44:28 -0400
Message-ID: <6591F529444E9748A546718B3D1A67015CD14A@xcgv2605.northgrum.com>

Oracle 8.1.7.4, AIX 5.2

I have a script which does an rman backup using the controlfile instead of a recovery catalog.

The relevant portion of the script looks like this:

rman target <id>/<password> nocatalog <<EOF run {

        allocate channel ch1 type disk format '<filepath>_1.rbk';
        allocate channel ch2 type disk format '<filepath>_2.rbk';
        allocate channel ch3 type disk format '<filepath>_3.rbk';
        allocate channel ch4 type disk format '<filepath>_4.rbk';
        allocate channel ch5 type disk format '<filepath>_5.rbk';
        backup database;
        sql 'ALTER SYSTEM ARCHIVE LOG CURRENT';

}
exit
EOF (The remaining code in the script backs up the control files and compresses the .rbk files.)

After I added a data file to one of my tablespaces, rman decided not to use channel 5.

After seeing what had happened I verified that I had a good backup by doing a test restore of the database on a development machine.

Any ideas what made rman decide not to use one of the allocated channels and is this something that I should be concerned about?

Thanks,
Peter Schauss

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Received on Thu Jul 28 2005 - 12:47:35 CDT