Powersnap uses the OS file system for creating snapshots. Since ASM is actually 
a live database, the snapshot cannot make it consistent. I'm not a big fan of 
ASM.

The NMO module should be able to have reasonable performance. How big is your 
database and network connections. You can setup multiple streams in NMO to 
greatly increase performance. For example:

run {
        set command id to 'HIST';

        allocate channel t1 type 'SBT_TAPE' parms 
'ENV=(NSR_DATA_VOLUME_POOL=OTAFull)';
        allocate channel t2 type 'SBT_TAPE' parms 
'ENV=(NSR_DATA_VOLUME_POOL=OTAFull)';
        allocate channel t3 type 'SBT_TAPE' parms 
'ENV=(NSR_DATA_VOLUME_POOL=OTAFull)';
        allocate channel t3 type 'SBT_TAPE' parms 
'ENV=(NSR_DATA_VOLUME_POOL=OTAFull)';

        backup database filesperset  4 force format='/%d_DATA_%U/'
        plus archivelog filesperset 16 force format='/%d_ARCH_%U/'
        delete all input;

        release channel t1;
        release channel t2;
        release channel t3;
        release channel t4;
        }

This will get you 4 streams.

On 8/13/08 6:07 AM, "anandhg" <networker-forum AT BACKUPCENTRAL DOT COM> wrote:

Recently we have mograted most of our Oracle database running in 9i to 10g with 
ASM. But Networker's powersnap module does not support Oracle ASM. If you are 
having 10g ASM databases how are you backing up the database. We are taking it 
using NMO module over LAN, but is there any better way we can improve this.

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