3.2

Table Of Contents
Creating and Restoring Database Backups
34
Perform a backup of the complete database to offline media. Avid recommends a
complete backup to offline media using a professional backup tool. Archive tools such as
Robocopy or 7-Zip are useful before doing a major system upgrade. They can be used in
place of a professional backup tool. However, performance and stability might suffer.
If you schedule a regular restart of the engine, set it after the regular backup is created.
If you restart the Interplay Engine, you cannot create a backup until at least one client
connects to the engine. This could be a problem if you schedule a restart and backup at a
time when there is little or not activity, such as the middle of the night.
c
The _Database and _PropertyStore folders of each database should be excluded from any
kind of virus checking (virus checking tools might try to lock the database files).
Setting the Number of Database Backups to Keep
The Interplay Engine always keeps the last Complete backup and any later Fast backups. If you
want to keep more than one Complete backup, change the “number of Backups to keep” setting
to be larger than the number of scheduled Fast backups. The default setting is 10.
The number of backups to keep includes Complete and Fast backups. After the Interplay Engine
finishes a Complete backup, it checks the number of backups in the _Backup folder. If the
number of backups to keep is exceeded, the Interplay Engine deletes the extra backups regardless
of backup type (Complete or Fast), starting with the oldest. In this way, there is always at least
one Complete Backup available.
Keeping More Than One Complete Backup
If you want to keep more than one complete backup, you must carefully calculate the number of
backups to keep. For example, if you schedule Complete backups once a week and schedule Fast
backups on the other 6 days, the number of backups to keep must be at least 8 (2 Complete
backups and 6 Fast backups). If the number of backups to keep is less than 8, on the day of the
Complete backup the Interplay Engine will delete the second-to-last Complete backup.
The following illustration shows Complete backups on Sundays and Fast backups on the other
days of the week. On Sunday the 8th, after finishing a Complete backup, the Interplay Engine
checks the number of backups. Because the number of backups to keep is 8, it keeps the
Complete backup performed on Sunday the 1st, the 6 Fast backups, and the last Complete
backup.
Sun Mon Wed
Tue Thu
Fri Sat Sun
12345678
CCFF FFFF