Milestone XProtect Advanced VMS 2014 - Manual (Page 65)

Milestone XProtect ® Advanced
VMS 2014
Administrator's Manual
www.milestonesys.com 65 Management Client elements
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Frames Per Second (FPS).
The size fields define the size of the camera's database, exemplified by the cylinder, and its archive(s)
respectively:
Recordings' way from recording database to archive to deletion
By means of retention time and size setting for the recording database, exemplified by the white area
in the cylinder, you define how old recordings must be before they are archived. In our illustrated
example, you archive the recordings when they are old enough to be archived.
The retention time and size setting for archives define how long the recordings remain in the archive.
Recordings remain in the archive for the time specified, or until the archive has reached the specified
size limit. When these settings are met, the system begins to overwrite old recordings in the archive.
The archiving schedule defines how often and at what times archiving takes place.
FPS determines the size of the data in the databases.
To archive your recordings, you must set all these parameters up in accordance with each other. This
means that the retention period of a next coming archive must always be longer than the retention
period of a current archive or recording database. This is because the number of retention days stated
for an archive includes all retention stated earlier in the process. Archiving must also always take
place more frequently than the retention period, otherwise you risk losing data. If you have a retention
time of 24 hours, any data older than 24 hours is deleted. Therefore, to get your data safely moved to
the next archive, it is important to run archiving more often than every 24 hours.
Example: These storages (image to the left) have a retention time of 4 days and the following
archive (image to the right) a retention time of 10 days. Archiving is set to occur every day at
10:30, ensuring a much more frequent archiving than retention time.
You can also control archiving by use of rules and events.