Chapter 2. Installing and configuring EWLM 21
2.2 The ITSO test environment
EWLM supports dynamic business application workflow technology for multiple tier
distributed heterogeneous operating system environments. The environment we used in the
lab at ITSO is illustrated in Figure 2-2. It consists of a Web Server tier, a two server
WebSphere cluster as the application tier, and a database tier. These four servers are
configured to participate in one EWLM management domain as managed servers.
Figure 2-2 Three tier architecture
Our entry application is the HTTP plug-in running on EWLM1. The WebSphere cluster
consists of the two servers EWLM2 and EWLM3 running WebSphere Application
Server 5.1.1. Our third tier is DB2 Universal Database (UDB) Version 8.2 running on the AIX
server EWLM4. The two servers EWLM1 and EWLM2 run on Windows version 2003. The
AIX servers EWLM3 and EWLM4 are deskside models of IBM ^ pSeries 630 running
on maintenance level three of AIX 5L Version 5.2. The domain manager EWLMDM1 in our
environment is running on Red Hat Enterprise Linux AS 2.1. This is where we run the EWLM
Control Center. Our configuration is shown in Figure 2-3 on page 22.
Web Server
HTTP Plugin 5.1.1
Application Servers
WAS 5.1.1
Database Server
DB2 UDB 8.2
EWLM2
(Windows)
EWLM3
(AIX)
EWLM1
(Windows)
EWLM4
(AIX)
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