Sun Fire B10n Content Load Balancing Blade Version 1.3 Administration Guide

This appendix defines some common load balancing terms, and provides examples of their use.

Sun Fire B10n Load Balancing Terms

Load Balancing Service

Defined by the destination 3-tuple, that is, the destination VIP, port, and protocol.

Example: 110.10.10.1:80:TCP

• Can be load balanced either at Layers 4 or 7
• Needs to be bound to one of the 2 interfaces on the blade
• Can be configured to support SSL if using a configuration with an SSL proxy
• When created, contains a default load balancing group with no servers or rules
• Load balancing groups with associated rules and schemes can be added
• Other attributes:
• IP persistence
• Cookie persistence
• Tracking
• Additional service access points (multi-homed service)

Load Balancing Group

• Contains a list of active servers (at least one)
• Contains a list of standby servers (optional)
• At least one rule must be specified (except for default group)
• Can add more rules or delete rules at run time
• Can add more servers or delete servers at run time
• Must have load balancing scheme specified:
• Round Robin (RR)
• Weighted Round Robin
• Static Load Balancing

Load Balancing Rule

• A rule is associated with a load balancing group in a service
• Four types of rules:
• Hypertext Transport Protocol (HTTP) URL rule

Examples: *.html, /subdir/*, /subdir/*.html

• CGI rule

Example: Server=MACHINE1

• Cookie rule

Example: L7server=server1

• IP rule

Example: 129.47.29.0:2333/255.255.255.0:0

Sun Fire B10n Content Load Balancing Blade Version 1.3 Administration Guide

817-6210-10

Copyright © 2004, Sun Microsystems, Inc. All rights reserved.