Chapter 40. Load Balancer Group configuration mode
This chapter provides an alphabetic listing of commands that are available in Load
Balancer Group configuration mode.
To enter this configuration mode, use the Global
loadbalancer-group
command.
The global command creates the Load Balancer Group if it does not exist. While in
this mode, define the Load Balancer Group.
To use a Load Balancer Group, provide the name of a group as the backend
destination for a top-level DataPower service.
All of the commands that are listed in “Common commands” on page 2 and most,
but not all, of the commands that are listed in Chapter 114, “Monitoring
commands,” on page 949 are also available in Load Balancer Group configuration
mode.
algorithm
Specifies the server selection algorithm.
Syntax
algorithm
{
first-alive
|
hash
|
least-connections
|
round-robin
|
weighted-round-robin
}
Parameters
first-alive
Uses the concept of a primary server and backup servers. When the
primary server is healthy, all connections are forwarded to this server.
When the primary server is quarantined or convalescent, connections are
forwarded to backup servers. The primary server is the first server in the
members list.
hash
Uses the IP address of the client or the value of an HTTP header as the
basis for server selection.
When using an HTTP header, use the
load-balancer-hash-header
command
to identify the header to read. This command is available only for
Multi-Protocol Gateway and Web Service Proxy services.
The same client is served by the same server. This algorithm is used in
applications that require the storage of server-side state information, such
as cookies.
least-connections
Maintains a record of active server connections and forward a new
connection to the server with the least number of active connections.
round-robin
(Default) Maintains a list of servers and forwards a new connection to the
next server on the list.
© Copyright IBM Corp. 1999, 2008
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