Cisco Headend System Release 2.5 Mode D'Emploi
2-2
Backup Recommendations
4001155 Rev B
System Backup Recommendations
Introduction
Cisco recommends that system operators perform a complete system backup (file
systems and database) prior to making any substantial modification to the system.
System operators can ensure the integrity of their DBDS data only by adhering to a
regular schedule of database and file system backups. The recommendations in this
section provide some guidance regarding the frequency with which system backups
should occur. Adjust these recommendations, if necessary, according to the size of
the system and the frequency with which the data changes.
Informix Database Backups
The Informix database on the DNCS contains all headend configuration information,
as well as data needed to provision and authorize Digital Home Communication
Terminals (DHCTs). Cisco recommends that system operators perform a complete
backup of the Informix database once a day. In addition, Cisco recommends that
system operators perform a complete backup of the database immediately before
and after a channel lineup change or a major system configuration change. Use the
procedures in this guide to back up the Informix database.
Note: Refer to Appendix C, Setting Up an Automated Database Backup, for a
Note: Refer to Appendix C, Setting Up an Automated Database Backup, for a
procedure that sets up an automatic database backup. You can use this procedure if
your database backup requires only one tape.
File System Backups
Cisco recommends that system operators perform a complete backup of the DNCS
and Application Server file systems at a minimum of once a month.
Important: Beginning with SR 2.2 and SR 3.2, you can now back up the file system
Important: Beginning with SR 2.2 and SR 3.2, you can now back up the file system
of the DNCS and the Application Server without first shutting down the system
components. Even though you are no longer required to shut down the system
components, Cisco highly recommends that you schedule your file system backups
for periods of lowest system activity.
Complete System Backups
Cisco recommends that system operators perform a complete system backup just
prior to upgrading to new system software, as well as after the upgrade. This backup
will be used in case the system must be rolled back to the previous release in the
event that the upgrade is unsuccessful.
Important: Clearly label the backup and remove it from the working area so that it
Important: Clearly label the backup and remove it from the working area so that it
cannot be accidentally restored to the new release. New and old backups are not
compatible.