POS Transaction Analyzer User and Installation Guide, SST Version 1.2

HP NonStop POS Transaction Analyzer: Overview 14
1-4-2 POS/TA Front-End Components
The POS/TA consists of the following components installed on the front-end.
• POS/TA Database
The POS/TA Database (POSDB) is installed on a system which has SQL Server installed on it. It can reside
on an independent system or coexist with other POS/TA components.
• POS/TA Application Server
The POS/TA Application Server includes various POS/TA services, for example: POSLOGGER Service,
POSSTATGEN Service, POSMON Service and Elink. These services can reside on the POS/TA Database
or on an independent system.
• POS/TA Web Server
The POS/TA Web Server is a web based application used to monitor POS transactions through web-
browser like Microsoft Internet Explorer. The POS Web Server should be installed on a system which has
Microsoft IIS 5.0 or above installed on it. The ASP.NET Server component accesses the information from the
POS/TA database and acts as a gateway to construct information that end-users view over the web.
1-4-3 Elink Communication Process
Elink is an independent communications process residing on both HP NonStop Servers and the front-end POS/TA
Application Server. POS/TA uses Elink as the communication channel between the POS/TA Application Server
and the HP NonStop host(s). Acting as a gateway for the HP NonStop environment, the Elink host running on the
HP NonStop system passes structured information to the POS/TA Application Server through the Elink service. It
is the middleware between the backend and front-end components of POS/TA. Elink configuration is handled
through the ELKCONF file on the HP NonStop Server and a configuration file on the POS/TA Application Server.