MACROMEDIA COLDFUSION MX-CLUSTERCATS, Руководство пользователя

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12 Chapter 2 Scalability and Availability Overview
Load management
Load management refers to the method by which simultaneous user requests are
distributed and balanced among multiple servers (Web, JRun, ColdFusion, DBMS, file,
and search servers). Effectively balancing load across your servers ensures that they do not
become overloaded and eventually unavailable.
There are several different methods that you can use to achieve load management:
•
Hardware-based solutions
•
Software-based solutions, including round-robin Internet DNS or third-party
clustering packages
•
Hardware and software combinations
Each option has distinct merits.
Most load-balancing solutions today manage traffic based on IP packet flow. This
approach effectively handles non-application-centric sites. However, to effectively
manage web application traffic, you must implement a mechanism that monitors and
balances load based on specific web application load. ClusterCATS ensures that the JRun
or ColdFusion server, the web server, and other servers on which your applications
depend remain highly available.
For more information on using hardware and software for load balancing, see “Creating
scalable and highly available sites” on page 28 .