Chapter 3. Installation Planning; Determining The Number Of Logical Libraries; Basic Guidelines; Library Sharing - IBM TS3100 Setup, Operator, And Service Manual

Chapter 3. Installation Planning

Before installing your library, take time to review the following information.

Determining the Number of Logical Libraries

You can partition the library into as many logical libraries as there are drives in the
library.

Basic Guidelines

v Each logical library must contain at least one drive.
v A library configuration of exactly one logical library equals the entire physical
v The library issues a warning to the user if media is moved across logical

Library Sharing

The library's default configuration allows a single application to operate the library
through a single control path. Often, it is advantageous to be able to share a single
library between heterogeneous (dissimilar) or homogeneous (similar) applications.
Some applications (and some servers) do not allow for sharing a library between
systems. Configurations can be created that enable the library to process
commands from multiple heterogeneous applications (such as an IBM System p
application and a Windows NT application) and multiple homogeneous
applications (for example, the same application run by several System p servers).
From the library's Web User Interface or Operator Control Panel, the following
actions can be performed:
v Configure the library so that it is partitioned into separate logical libraries that
v Configure any single logical library (including the entire physical library) so that
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library.
libraries.
independently communicate with separate applications through separate control
paths. This configuration requires no special capabilities from the server or
application. (For more information, see "Using Multiple Logical Libraries for
Library Sharing" on page 3-2.)
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
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Storage Manager (TSM).
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