Hi Mike,
Logon to VMS,
VPN/Security Management Solution--->Administration----->CommonServices-----> Backup Database
The process above lets you pick the location of where to save the backup.
For restoring, follow the same path, but choose restore.
VMS has different databases for different purposes.
COMMON SERVICES -- FMS/KRS/Sybase
PIX MC ----------- FMS/KRS
AUS -------------- Sybase
ROUTER MC -------- Sybase
IDS MC ----------- Sybase
The size of the database depends upon how many devices reporting to the VMS/Security monitor and how many events are these generating.
For additional CLI utilities for IDS database, please refer to the below url
http://www.cisco.com/univercd/cc/td/doc/product/rtrmgmt/cw2000/cw2000_b/vpnman/vms_2_1/secmon11/ug/appa.htm
Hope this helps.
Thanks,
yatin