vsgdb(5)

NAME
vsgdb - Volume Storage Group Data Base specification

DESCRIPTION
The volume storage group data base is stored in ASCII form in /vice/db/VSGDB on the system control machine (SCM). It maps VSG numbers into the sets of servers which comprise them. Each VSG is represented by a single line with the following format: <VSG number> <server-name 1> ... <server-name n> VSG numbers are in hexadecimal, and must correspond to a legal multicast address as specified in the multicastgroups (5) file. Server names must correspond to entries in the servers (5) data base. There is a limit of 8 on the number of servers in any one VSG. A sample entry from the VSGDB is: E0000107 mahler vivaldi ravel The VSGDB is consulted by the createvol_rep (8) script when creating a replicated volume. The VSG number specified is looked up in the VSGDB to determine which sites will host the supporting read-write volumes. The VSG number is then wired-into the VRList (and then vrdb) (5) entry for the new replicated volume.

FILES
/vice/db/VSGDB

SEE ALSO
servers (5), vrdb (5), createvol_rep (8)

AUTHOR
Jay Kistler, 1990, Created