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RMAN channel

An RMAN channel is needed in order to perform RMAN operations on a media manager (see media management software) The channel handles communication between RMAN and the (third party) media manager. Such a channel is allocated with the RMAN command allocate.
A channel is not needed if RMAN operates on a disk.

Channel types

RMAN supports the two channel types

RMAN commands

configure channel device type disk maxpiecesize 2G;
configure channel device type disk format /tmp/%u;
allocate channel chnl_1 device type disk;

Format specifiers (

The format specifiers determine the name of a backup piece. 
configure channel device type disk format '/u01/backup_df%t_s%s_s%p';
The format specifiers are introduced with a percent sign:

ASM disk location

configure channel device type disk format '+dgroup1';

Parallel operations

Ideally, there is one channel for each tape drive or physical disk. 
configure device type sbt parallelism 4;

See also

RMAN

Index

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