Re: rman parallel processes

No, it does not make sense. The "configure channel 1" set options for the first of the 4 automatic channels you've declared with "confiure ... PARALLELISM 4". The other three channels inherit the configuration of the generic automatic channel, which you haven't declared and which thus defaults to a channel configured to create backup pieces in $O_H/dbs on Unix.

Run something like this to configure the generic automatic channel and put the pieces created by the 3 other channels in a more reasonable place:
configure channel device type disk format '/my/path/%U';

On Dec 19, 2007 4:26 PM, Joe Smith <joe_dba_at_hotmail.com> wrote:
>
> Does it make any sense to run 4 processes for a rman full database backup
> when you have configured only 1 default channel?
>
> The channel is a disk and the backup files are all going to that same disk.
>
> CONFIGURE DEVICE TYPE DISK PARALLELISM 4; # default
>
> CONFIGURE CHANNEL 1 DEVICE TYPE DISK FORMAT
> '/u01/backup/oracle_sid/bu.d%d.t%t.s%s.p%p' MAXPIECESIZE 1 G;
>
>
> Is this going to run faster or the fact of a single disk will slow it down?
>
> thanks.
>
>
>
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