MACROMEDIA COLDFUSION MX-CLUSTERCATS, Руководство пользователя

Страница: 12 / 156

2 Chapter 1 Before You Begin
ClusterCATS overview
The ClusterCATS technology provides robust features for website availability, load
balancing, and failing-over servers.
A website is no longer just a web server. Most websites have moved beyond static HTML
pages on a web server. To generate dynamic content or process transactions, a website
now includes multiple resources — web servers, files, applications, databases, and other
software processes on multiple servers in one or more locations. The move to a more
advanced site, consisting of multiple resources, often from multiple vendors, introduces a
major problem — overall site availability and performance. More resources, especially
software resources, and more links between them exponentially increase the probability
of failure. Creating a fast, reliable website becomes substantially more challenging.
Macromedia created ClusterCATS, a complete website resource management solution, to
enable service level agreements offering 24x7 availability and optimal response time for
e-commerce, customer self-service, sales automation, customer support, and other critical
business functions. With ClusterCATS, you can build and manage advanced websites,
consisting of multiple resources spanning multiple servers, in one or more locations.
ClusterCATS builds and manages clusters. A cluster is a group of website resources,
including web servers, files, applications, databases, and even the network, that act in
unison, providing reliable and rapid user access. These resources can be clustered in a
single building, distributed in a local area network (LAN), or distributed in a wide-area
network (WAN) in multiple locations across the world. A cluster intelligently detects and
transparently shields users from the following critical problems:
•
Failed and busy servers
•
Failed and busy applications and databases
•
Slow networks caused by congestion, latency, and bandwidth problems
ClusterCATS capabilities
ClusterCATS delivers critical capabilities required by advanced websites today. These
capabilities produce important benefits in the areas of website performance, availability,
manageability, and scalability.
User response time is accelerated with ClusterCATS application and server load
management.
ClusterCATS consists of server and client components. The ClusterCATS Server runs as
a Windows service and ISAPI filter, NSAPI plug-in, or Apache module. ClusterCATS
Explorer is the client-based management application used to build and manage clusters.
Operating in conjunction with an administrative agent on each ClusterCATS Server,
ClusterCATS Explorer provides all the required tools for centrally managing one or more
clusters from any location.
You can also configure ClusterCATS software to enhance simple web server
load-balancing products, such as Cisco’s special-purpose LocalDirector hardware device.