Glossary for the WebSphere environment performance tests

Terms used in the End-to-End Performance of a WebSphere Environment on Linux on zSeries Including Edge Components paper are defined here.

Cluster

Clusters are groups of servers that are managed together and participate in workload management. A cluster can contain nodes or individual application servers. A node is usually a separate server system with a distinct host IP address that is running one or more application servers. Clusters are responsible for balancing the workload among these servers. Servers that are a part of a cluster are called cluster members. When you install an application on a cluster, the application is automatically installed on each cluster member.

CPU load

This percentage value means the CPU utilization caused by the Linux® system. The System Activity Reporting (SAR) package under Linux supplies this value.

DMZ

Demilitarized zone. A DMZ is a network area that sits between an organization's internal network and an external network, usually the Internet. Access from the DMZ to the internal zone is as restricted as possible. In our tests, only the proxy was able to access well-defined targets in the internal zone from the DMZ.

EJB

Enterprise Java™ Beans. Component architecture for development and deployment of object-oriented, distributed, enterprise-level applications.

HTML

Hypertext Markup Language. A markup language for hypertext in documents on the Internet.

I/O usage

This value (used in blocks of 1 KB) indicates the traffic to the input and output media. The System Activity Reporting (SAR) package under Linux supplies this value.

JSP

Java Server Pages. An extensible Web technology that uses template data, custom elements, scripting languages, and server side Java objects to return dynamic content to a client. Typically, the template data is HTML or XML and, in many cases, the client is the Web browser.