openswitch db files

http://openvswitch.org/support/dist-docs/ovsdb-tool.1.html

FILES
       The default db is /etc/openvswitch/conf.db.  The default schema  is
       /usr/share/openvswitch/vswitch.ovsschema.   The  help command also dis‐
       plays these defaults.


so , if you want to backup the database of openvswitch , just copy this file