Using Data Domain to store Avamar backup data is going to be
the standard implementation whenever the data to be backed up exceed the
capacity of a single Avamar node. This combination
allows for a much smoother upgrade as more backup capacity is required. It does have one major flaw and if you are
not careful you can fill the capacity on the Avamar node without ever storing
any backup data on the Data Domain.
The issue is that when creating new Data Set Policy you must
set each Plugin used in the DataSet Policy
to send the backup data to the Data Domain.
If you do not the default is to put the backup data on the Avamar
node. In most cases by the time it is
discovered it is too late to fix.
The solution is to lock the backups
to only go to the Data Domain following this procedure.
Procedure to lock down an
Avamar – Data Domain integration to only allow Data Domain backups:
Login to the Avamar utility node command line ssh as user
"admin" and load proper ssh keys.
Change to directory:
cd
/usr/local/avamar/var/mc/server_data/prefs/
Backup current mcserver.xml file:
cp -p mcserver.xml
x-mcserver.xml-YYYYMMDD
where
YYYYMMDD is the current year, month and day
Edit the file:
vi mcserver.xml
Search for the line similar to:
<entry
key="dd_only_mode" value="DATASET" />
Modify the value to "ALL" so that the line now looks
like:
<entry
key="dd_only_mode" value="ALL" />
Save and exit file.
Restart the MCS:
dpnctl stop mcs
dpnctl start mcs
Verify all services are up and running with:
dpnctl status
Take a MCS flush or backup:
mcserver.sh --flush
If no errors or issues seen in the flush command, logout of
command line.
Evan after setting the lock it is still important
to make sure that any new Data Set Policy created is set for each Plugin
used in the DataSet Policy to send the backup data to the Data Domain.
In addition you
will need to modify all of the
Default DataSets Plugins to send the backup data to the Data Domain the
same as it were an new DataSet Policy.
If this change is not made any on demand backup performed will fail and
report that there is no Data Domain present.