Cisco Headend System Release 2.5 用户指南
3-8
Backing Up and Restoring the Informix Database
4001155 Rev B
Restore the Informix Database
Introduction
This section contains the following information:
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Default DNCS tape drive configuration information
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A procedure to determine the configuration of the tape drive in use on your
system
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Procedures to restore the Informix database
Prevent the Loss of Data
When you restore the database, you restore it with data that was present in the
database at the time of the backup. Unless you coordinate the restore procedures
with your billing vendor, you run the risk of losing data that was transmitted to your
system since the time of the backup. By adhering to the following guidelines, you
can minimize the risk that you will lose data when you restore the database.
Follow these guidelines when restoring the database:
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Follow these guidelines when restoring the database:
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Before restoring the database, contact your billing vendor and request that the
billing vendor send no more transactions until the restoration is complete.
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If your system is still functional at the time of the restore, request that the billing
vendor download from the DNCS the latest set of IPPV billing transactions before
you start the restoration process. This way, you have the most current record of
subscriber IPPV purchases.
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After completing the restoration of the database, contact the billing vendor and
request that the billing vendor re-transmit all transactions since the date of the
backup tape you used. For example, have the billing vendor re-transmit
transactions relating to DHCT service levels, PPV event definitions, and package
authorizations.
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Run the smMix utility between 12 and 24 hours after restoring the database in
order to chart the expiration time of EMMs in the system.
Notes:
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Notes:
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This guideline is especially useful for sites that have restored a database from a
tape that is more than 10 days old. When the database is restored, these sites are
likely to be repopulated with EMMs that are due to expire in fewer than 20 days,
resulting in an uneven distribution of EMMs. The smMix utility will help you
decide whether these EMMS should be redistributed.
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Refer to Chapter 10, Chart EMM Expiration Times With the smMix Utility, in
DBDS Utilities Installation Instructions and DNCS Utilities User’s Guide, part
number 740020, for instructions on running the smMix utility.