Predictor Roundrobin - Enterasys Matrix DFE-Gold Series Configuration Manual

Understanding Transparent Web Cache Balancing (TWCB)

predictor roundrobin

Use this command to modify the round‐robin predictor value by applying a list of destination IP
addresses for which the cache servers within this server farm will be selected by the round‐robin
algorithm.
Syntax
predictor roundrobin ip-address-begin ip-address-end
Parameters
ip‐address‐begin
ip‐address‐end
Defaults
None.
Mode
Router command, Server Farm Configuration mode: Matrix(rw)‐>Router(config‐twcb‐wcsfarm)#.
Usage
The router uses the end‐user IP address, making the HTTP request, to determine which cache
server it will send the request to. If a web site is accessed frequently, the cache server serving
requests for this end‐user ip address may become overloaded with user requests. You can specify
end‐user ip addresses be distributed across the cache servers of this server farm in a round‐robin
algorithm using the predictor roundrobin command.
When a predictor round‐robin user list is configured, only users in configured lists are cached in
cache servers belonging to this server farm. If no predictor round‐robin user list is configured for a
server farm, all other users not configured in a predictor round‐robin user list on some other
server farm may be cached in the cache servers belonging to this server farm.
Up to 10 separate lists can be defined per server farm. The destination IP addresses specified can
not be already configured within any other round‐robin destination IP list.
Example
This example configures a predictor round‐robin for the web‐cache server farm s1Server
specifying that the end users with IP addresses from 10.10.10.05 through 10.10.10.25 should be
selected on a round‐robin basis for caching on cache servers belonging to this server farm:
Matrix(rw)->Router(config)#ip twcb wcserverfarm s1Server
Matrix(rw)->Router(config-twcb-wcsfarm)#predictor roundrobin 10.10.10.05
10.10.10.25
23-4 Transparent Web Cache Balancing Configuration
The beginning IP address of a list of destination IP addresses for which
the cache servers within this server farm will be selected by the
round‐robin algorithm.
The ending IP address of a list of destination IP addresses for which the
cache servers within this server farm will be selected by the round‐robin
algorithm.
predictor roundrobin