A: Video database is a virtual storage to
keep recorded images.
Internally, this virtual storage consists of two different types
of files: VMB and VDB. The VMB type stores digitized and compressed
video data of recorded frames. This type has permanent size and
is defined by user.
The Video Server has possibility to handle multiple VMB files.
VMB files may reside at different locations and use different
devices (including internal and external hard disks, RAID arrays,
network disks and storage) to store them. Only requirement is
valid operating system drive letter (i.e. D: E: Z:). From
the Video Server point of view all VMB files form the only virtual
storage..The VDB type stores links and indexing information to
recorded video data (which resides in the VMB files) for fast
system access. This type has dynamic size and handled by the Video
Server.
This structure of the Video database is also applied to separate
stored fragments of the
video archive (which can be made by "Save video fragment"
button in Video Explorer
menu in Video Server or Video Client application). To keep some
extra information
about cameras and their settings another VDD file type is used.
