Technical Manual
U-SYS MRS6100 Media Resource Server
Chapter 7 Operation and Maintenance
Huawei Technologies Proprietary
7-5
III. Data CRC
To ensure the consistency of data in the BAM (background) and the FAM modules
(FAM), MRS6100 OMS provides the CRC function to verify the consistency of BAM
data and FAM data.
The BAM periodically originates check requests for data in the FAM (data check is
performed in single table form). Through CRC, it can be obtained whether a data
table in the BAM is consistent with that in the FAM. When the BAM detects any
inconsistency between the BAM and FAM data, it initiates a data setting request to
the FAM. If data setting failures exceed the limit, the BAM generates an alarm
automatically. The operator can make data consistent by setting or loading data.
IV. Data Backup
To ensure the security of data, the system provides the function to back up BAM,
registry files and configuration files to the specified directory. In case of system
failure, the operator can restore the system by using the backup database files and
configuration files. Data backup can be implemented in two ways:
z Automatic backup of background data
z The system data are backed up when the traffic is relatively low. When the
system is carrying out the backup command, it will not accept any service
command request.
z Manual backup of background data
There are two ways to manually back up system data. One way is to implement
backup with the MML commands and the other is to use the database management
utility to back up database directly.
V. Automatic format conversion of incomplete data during BAM restart
There may be unfinished data format conversion and data sending tasks when the
BAM is shut down improperly (for example, power failure). When the BAM restarts,
the system checks for unfinished tasks and continues them.
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