Cisco Headend System Release 2.5 User Guide
Back Up the Informix Database
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Back Up the Informix Database
This section contains the following information:
Default DNCS tape drive configuration information
Procedures to back up the Informix database
Our engineers recommend that you back up your Informix database early in the
morning or late at night, when system activity is usually at a minimum.
Back up your database before your billing system uploads subscriber impulse pay-
Back up your database before your billing system uploads subscriber impulse pay-
per-view (IPPV) purchases from your DNCS. By backing up your database before
your billing system uploads IPPV purchases, you have a record of subscriber
purchases in the event that the billing system loses this data.
Avoid backing up your database while you are performing the following system
Avoid backing up your database while you are performing the following system
tasks:
Running the Interactive Program Guide (IPG) Collector
Loading an Entitlement Management Message (EMM) CD
Staging DHCTs
Downloading IPPV events
Default Tape Drive Configuration
The script used by the DNCS to back up the Informix database uses the following
default tape drive configuration:
Tape size: 8000000 KB
Block size: 32 KB
Device name:
/dev/rmt/0h
This tape drive configuration is in use on a majority of systems. Occasionally,
however, the tape drive on a system may be configured with a different device
name, such as /dev/rmt/1h.
Note: The ‘h’ that appears at the end of device name /dev/rmt/0h or /dev/rmt/1h
Note: The ‘h’ that appears at the end of device name /dev/rmt/0h or /dev/rmt/1h
indicates that the system is to use a high density format (compressed) when writing
to the tape.
If you know that the device name of your tape drive is /dev/rmt/0h, you may skip
If you know that the device name of your tape drive is /dev/rmt/0h, you may skip
the following procedure, Checking Your Tape Drive Configuration, and continue with
Backing Up the Informix Database (on page 18). However, if you are unsure of the
device name of your tape drive, or if you just want to verify that the device name is
/dev/rmt/0h, complete the following procedure.