Using Multiple Logical Libraries For Library Sharing; Using Multiple Control Paths - IBM System Storage TS3310 Setup And Operator Manual

v Configure any single logical library (including the entire physical library) so that
Library configuration is not limited to the examples given above. Many
configurations are possible, and can be designed according to your business needs.
For additional information, refer to your host application documentation.

Using Multiple Logical Libraries for Library Sharing

Multiple logical libraries are an effective way for the library to simultaneously back
up and restore data from heterogeneous applications. For example, the library can
be partitioned so that it processes:
v Commands from Application 1 (about Department X) in Logical Library A
v Commands from Application 2 (about Department Y) in Logical Library B
v Commands from Application 3 (about Department Z) in Logical Library C
In this configuration, the storage slots and drives in each logical library are
dedicated to that library and are not shared among other libraries. Commands
issued by the applications travel to the library through three unique control paths.
Thus, the data processing for:
v Department X is confined to the storage slots and drives in Logical Library A
v Department Y is confined to the storage slots and drives in Logical Library B
v Department Z is confined to the storage slots and drives in Logical Library C

Using Multiple Control Paths

In addition to creating multiple logical libraries, any logical library can be
configured to have more than one control path. When configuring additional
control paths, additional library sharing configurations and availability options are
made possible. Access to the logical library is on a first-come, first-served basis and
each control path for a logical library can accept commands while the library is in
use by another control path. By default, a logical library can communicate with the
server only through the first LUN-1-enabled drive that is installed in the partition.
Note: Microsoft Windows
2-2
TS3310 Tape Library Setup and Operator Guide
it is shared by two or more servers that are running the same application.
Depending on the capabilities of the server and application, there are several
ways to set up this type of configuration. Three typical ways include:
– Configuring one server (host) to communicate with the library through a
single control path; all other servers send requests to that server through a
network. This configuration is used by Tivoli
– Configuring all of the servers to communicate with the library through a
single, common control path. This configuration is used in high-availability
environments such as IBM's High Availability Clustered Microprocessing
(HACMP) and Microsoft's Systems Management Server (SMS) and Clustered
Server Environments. Multi-initiator configurations are only supported by
certain adapters and independent software vendors (ISVs). Check with your
ISV.
– Configuring a single logical library to communicate with multiple servers
through multiple control paths. This configuration requires that control paths
be added (see "Using Multiple Control Paths"). It is used by Backup Recovery
and Media Services (BRMS).
Manager (RSM) does not support multiple control paths within a logical
library. IBM recommends that RSM be disabled to use this feature.
®
2000 and Microsoft Windows 2003 Removable Storage
®
Storage Manager (TSM).