Avaya Integrated Management Network Management Console Betriebsanweisung Seite 171

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4. Select the backup archive that you want to restore from the directory where you
saved it.
5. Check Recover PostgresSQL database using write ahead logs (WAL) only if
you have selected the most recent backup archive for restore.
For more information on the Recover PostgresSQL database using write ahead
logs (WAL), refer to
About Recovering the PostgresSQL database using write
ahead logs (WAL) on page 171
6. Click Restore to start the restore operation. The status is updated in the log window.
Once the restore operation is completed successfully, you can close the restore
utility and start Avaya services from Start > Program Files > Avaya > Start Avaya
Services.
Result
Note:
If Avaya Services are already running then it is stopped when you click Restore. You can
start it after the restore operation is completed successfully.
About Recovering the PostgresSQL database using write ahead
logs (WAL)
The Recover PostgresSQL database using write ahead logs (WAL) option is used to
restore the PostgreSQL database to the current state with all the entries in it.
The Network Management Console use the PostgreSQL database to store the data. The
database gets installed automatically during the Network Management installation. When you
backup the data using the NM Backup Utility the data from the PostgreSQL database also gets
backed up.
When you restore the backed up data using the NM Easy Restore utility, all the data entered
in the database after the backup operation is not included in the restore. It is lost. However,
it is possible to recover this data using the PostgreSQL database feature called WAL (Write
Ahead log) archiving.
Using this feature, PostgreSQL remembers the date and time you took the last backup and all
the data entered thereafter is maintained separately in a log file called “write ahead log” (WAL)
in its internal directories.
During restore, if Recover PostgresSQL database using write ahead logs (WAL) is
selected, the NM Easy Restore utility attempts to restore this data using the latest WAL file
along with the backed up data bringing the database to the current state with all the entries in
it.
Restoring the data using the Avaya NM Easy Restore Utility
Avaya Integrated Management Network Management Console User Guide November 2010 171
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