Sun Microsystems SunLink SNA 9.1 PU2.1, Configuration Manual

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E-1
Load Balancing
E
This appendix contains the following sections:
•
Overview - provides a brief description of load balancing.
•
Normal Load Balancing - describes normal load balancing and provides an
example.
•
Geographical Load Balancing - describes geographical load balancing and
provides an example.
E.1 Overview
If a traditional TN3270, extended TN3270E, or sun3270 client requests a
connection to a pool of logical units (LUs) that spans multiple hardware
platforms, the Sun PU2.1 SNA Server performs load balancing to ensure that
the client is connected to the best possible LU. Load balancing considers
available LUs, system load, and the highest bandwidth SNA data link type
available in determining the selection of an LU. If the LUs are geographically
dispersed, the server can use geographical load balancing to ensure that an LU
is selected from the most suitable geographical location.
The differences between normal load balancing and geographical load
balancing are described in the following sections.
E.2 Normal Load Balancing
The following sections provide a description of normal load balancing and a
normal load balancing example.