Availability Guide for Application Design

Improving Availability on the Internet
Availability Guide for Application Design—525637-004
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The iTP WebServer Architecture
automatically in response to changes in workload. NonStop TS/MP can also restart a
server process that fails. (The iTP Secure WebServer uses the default value of the
PATHCOM AUTORESTART parameter.)
PATHMON Process
The PATHMON process provides centralized monitoring and control of a PATHMON
environment consisting of server classes and other types of objects. You establish the
operational parameters for the PATHMON environment, including the characteristics of
individual server classes, by creating a PATHMON configuration file. Thereafter, you
can use the PATHCOM utility to make configuration changes and obtain information
from the PATHMON process.
Multiple PATHMON environments can run on the same NonStop system. For example,
the iTP Secure WebServer Administration Server has its own PATHMON environment,
separate from the iTP Secure WebServers environments it manages. (If you have
multiple iTP Secure WebServer environments on the same system, you still need only
one PATHMON environment for the Administration Server.) Each PATHMON
environment has a separate, uniquely named PATHMON process.
WebSafe2 Interface Driver (WID)
A WID is required when you are using the WebSafe2 unit to perform hardware
encryption.
Active Transaction Pages (ATP)
Active Transaction Pages (ATP) provides a server-side JavaScript environment for HP
NonStop Systems. You can use ATP objects to provide web-based interfaces to
existing NonStop TS/MP, NonStop TUXEDO, NonStop SQL/MP, and sockets
applications.
See the iTP Active Transaction Pages (iTP ATP) Programmer’s Guide for further
information.
Pathway CGI Server
The Pathway CGI extensions are a set of utility procedures that let you develop CGI
applications as NonStop TS/MP server classes or integrate existing NonStop TS/MP
applications into the iTP Secure WebServer environment.
Generic Common Gateway Interface (CGI) Server
CGI is a standard for applications that interface with web servers. CGI applications can
be written in a variety of computer languages (or scripts) including Perl, C, Korn Shell,
and others. The iTP Secure WebServer provides a generic CGI interface that fully
conforms to the NCSA CGI/1.1 standard.