RMAN connection to Catalog

Today my nightly backups were not taken. I had an OS script that started backup using this command:

rman target=sysop/password@targetdb catalog=rman/password@catdb 
      log=rman.log append @rman.txt

The reason was that network was down and there was no connection to catdb. It leaded to error and RMAN did not start at all. So I’ve changed my command line to:

rman target=sysop/password@targetdb 
      log=rman.log append @rman.txt

And added a line in rman.txt

connect catalog rman/password@catdb;

Next time there will be no connection to catdb backup will be done anyway. It will be not registered in catalog only. Catalog will be synchronized on next backup procedure or next time you connect to target and catalog an issue any command that operate on catalog.

Cheers, Paweł