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Configuring a Centralized Media Management Database
Chapter 8368
Configuring a Centralized Media Management
Database
It is not required to set up a Centralized Media Management Database
(CMMDB). If you do not set up a CMMDB, Data Protector will work in a
multi-cell environment, but each cell will have its own IDB. See
“Centralized Media Management Database (CMMDB)” on page 366 for
more information on this functionality.
This section describes how to configure a Centralized Media
Management Database for the whole multi-cell environment. If it is
needed, this process will merge the local Media Management Database
into the CMMDB. You can decide for each cell if it will use the CMMDB
or its own local MMDB.
IMPORTANT The CMMDB has a major effect on licensing. Immediately after the
MMDB is changed from local to remote, all the licenses associated with
libraries and devices are taken (validated) from the MoM Manager and
can be removed from client cells.
When the CMMDB is used, it does not have to reside on the MoM
Manager system. The CMMDB can reside on any Cell Manager in the
MoM environment. The Cell Manager on which the CMMDB is located is
specified in the file mmdb_server in the following directory:
• On Windows: <Data_Protector_home>\config\cell
• On UNIX: /etc/opt/omni/cell
Each medium with protected data on it has information showing which
cell currently owns the data. Once this protection has expired, any cell
can reuse the medium. If a tape has been initialized by one cell, any
other cell can use it, as long as it does not have any protected data on it.
If a tape is loaded in a library and not yet initialized, any cell can
initialize it, assuming that there is a loose media allocation policy and
no other tapes are available.
The media allocation rules apply in exactly the same way to shared
tapes, except that appendable media can only be appended by the cell
that owns it.