RDF/IMP and IMPX System Management Manual (RDF 1.3+)

Managing RDF
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
5-27
Making Online Dumps With Updaters Running
3. When the backup process opens AA000007 and the backup is in progress, you can
stop the file-opening process run in Step 1. The purger will continue its attempts to
purge AA000007, but these attempts also will fail as long as the backup process has
AA000007 open. Eventually, when the backup is complete and AA000007 is
successfully copied to tape, no processes will have this file open. After this point,
the purger will be able to purge AA000007 successfully.
Repeat the preceding steps for each image trail file you wish to back up.
Making Online Dumps With Updaters Running
RDF/IMP and IMPX allow you to take dumps of the backup database while the updaters
are running. To do this, you use the UPDATEROPEN parameter of a SET RDF or
ALTER RDF command to specify the access mode (protected or shared) that all of the
updaters use when opening database files.
The default is protected access.
Protected access is strongly recommended, except when you specifically wish to take
dumps of the backup database with the updaters running.
To take online dumps of the backup database while the updaters are running, do as
follows:
1. Stop RDF (issue a STOP RDF command on the primary system).
2. Alter the UPDATEROPEN attribute of the RDF configuration to SHARED:
ALTER RDF UPDATEROPEN SHARED
3. Restart RDF (issue a START RDF command on the primary system).
4. Initiate the online dump.
After dumping is finished, you should change the access mode back to protected, as
follows:
1. Stop RDF (issue a STOP RDF command on the primary system).
2. Alter the UPDATEROPEN attribute of the RDF configuration to PROTECTED:
ALTER RDF UPDATEROPEN PROTECTED
Restart RDF (issue a START RDF command on the primary system).