Dell Avamar for Oracle 19.10 User Guide

Allocating multiple channels

An RMAN backup script that specifies multiple channels runs multiple instances of the avtar program in parallel. The maximum number of channels is 10.

1. Disable the file cache by adding the following entry to the avtar flag file:
   --enable-filecache=false
2. Create an RMAN script that includes allocate channel commands similar to the following commands:

   allocate channel c0 type sbt
   PARMS="SBT_LIBRARY=/usr/local/avamar/lib/libobk_avamar64.so"
   format '%d_%U';
   allocate channel c1 type sbt
   PARMS="SBT_LIBRARY=/usr/local/avamar/lib/libobk_avamar64.so"
   format '%d_%U';
   allocate channel c2 type sbt
   PARMS="SBT_LIBRARY=/usr/local/avamar/lib/libobk_avamar64.so"
   format '%d_%U'

3. Repeat the allocate channel command to allocate more channels, if required.
4. Add a send command to the RMAN script for each channel. For example, the following send commands correspond to the channels specified in step 2.

   send channel='c0' '"--flagfile=/oracle/my-avtar-flags.txt"
   "--bindir=install-dir/bin" "--cacheprefix=orcl-c0"';
   send channel='c1' '"--flagfile=/oracle/my-avtar-flags.txt"
   "--bindir=install-dir/bin" "--cacheprefix=orcl-c1"';
   send channel='c2' '"--flagfile=/oracle/my-avtar-flags.txt"
   "--bindir=install-dir/bin" "--cacheprefix=orcl-c2"';

   The script specifies a cacheprefix directive for each channel. If the send command is split into multiple instances, specify the cacheprefix directive only once for each channel.
5. Before running an RMAN script that allocates multiple channels, ensure that the user account has permissions to create files in the install-dir/var directory or the cache files exists and has the correct permissions.