Use multiple database servers within a Tango control system#
The database device server, TangoDatabase in most cases, serves as the Tango Host in a control system. The
host name and port number of the database server is known via the TANGO_HOST environment variable. If
you want to use several tango hosts in order to handle one being unreachable (either due to a network outage, a
crash or a hardware issue), use the following TANGO_HOST syntax:
TANGO_HOST=<host_1>:<port_1>,<host_2>:<port_2>,<host_3>:<port_3>
All calls to the database server will switch automatically and transparently to a running server in the given list if the one used is not reachable.