I have increased the 'filesperset' from 1 to 5, then 20. On both occasions,
this has caused
both tapes to be active all the time.
Just what I was after.
thanks muchly
steve

> -----Original Message-----
> From: Neil Rasmussen [SMTP:nrasmuss AT US.TIVOLI DOT COM]
> Sent: 23 October, 2001 9:44 PM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Re: rman question
>
> Steve,
>
> Rman will hold all channels until it finishes it processesing on the
> entire backup job. Rman usually does a good job making sure that the
> channels get equal amount of work but you can imagine that in some
> instances the majority of the work load goes to one channel. For instance:
> channel t1 backs up the control file and several small datafiles that
> equal 100mb while channel t2 gets a datafile (maybe the remaining backup
> piece) that is 700mb. In this case channel t1 will have finished long
> before channel t2 and then Rman holds the resources of t1 until t2
> completes.
>
>
> Date:    Mon, 22 Oct 2001 15:50:23 +0800
> From:    Steve de Souza <DeSouzaS AT BUNNINGS.COM DOT AU>
> Subject: rman question
>
> Hi there
>
>         I use tdp for oracle 2.2 on a tsm4.2 server
>         I allocate 2 channels for the rman backup, t1 and t2
>         when the backup starts, it initially starts to write to 2 tapes.
>         After a short while, one drive goes idle and the other tape
>         continually gets written to, till completion of the backup.
>
>         Anyone have any idea as to what is causing one the tapes to go
>         idle?
>
>         The backup files aren't very big.
>         channels t1 and t2 continue to get 'allocated' to completion if
> the
> job.
>         The mountretention on the devc is big.
>         what else could I check?
>
>         cheers
>
>         steve
>
>
> Regards,
>
> Neil Rasmussen
> Software Development
> TDP for Oracle
> rasmussn AT us.ibm DOT com

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