Sun Microsystems SunLink SNA 9.1 PU2.1, Руководство по настройке

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Load Balancing E-5
E
E.3.1 Geographical Load Balancing Description
Geographical load balancing is useful if your LUs are geographically dispersed
or if you want all clients to connect to a resource using the same name.
Geographical load balancing is more difficult to implement, requiring a
detailed knowledge of the TCP/IP infrastructure relevant to IP addressing,
netmasking, and hostnames. However, it eliminates the need for individual
user-by-user configuration and reduces the communications costs and effort
required to manage the network.
To use geographical load balancing, you must create a user record for each
geographical location and specify one or more default resources and either an
IP address or an IP hostname. For each user record, specify the LU pool at or
closest to that geographical location first in the list of default resources. For
more information about configuring user records, refer to Chapter 10,
“Configuring Users."
You must also implement at least one secondary Domain Name System (DNS)
in each geographical location and configure each desktop to point to the
secondary DNS. This maps the incoming IP address or hostname of the name
resolution request received from the secondary DNS to the list of default
resources. For more information, refer to DNS or desktop-specific
documentation.
If you want all clients to connect to a resource using the same name, the client
connection request must contain the geographical load balancing keyword. The
presence of this keyword instructs the SunGMAN to perform geographical
load balancing when handling this connection request. When you install the
SunGMAN, the software enables geographical load balancing, using the
keyword
glb
by default. If you want to change the keyword, you must include
-g
keyword
on the command line to the SunGMAN, where keyword is the user-
defined keyword.
Note – Depending on the variety of IP addresses in a particular geographical
location, you may have to configure multiple user records to provide access for
all desktops.