OpenVMS Asynchronous System Trap related Consulting Services
Since the firm's founding in 1978, Mr. Gezelter has worked extensively with
the OpenVMS (and RSX-11) Asynchronous System Trap (AST) facilities.
His work has included:
- developing applications making extensive use of the OpenVMS
Asynchronous System Trap (AST) facility to provide high performance, robust
applications in a range of applications, including terminal management and
- developing middleware components which make extensive use of ASTs to
permit the efficient, robust handling of events comming from different
client applications in an indeterminate order. One example of such an
application was a trading system middleware component which was completely
implemented using a series of AST routines. This component went through
three major releases without encountering a significant
synchronization bug, despite the complexity inherant in operating with
multiple communications, applications, and timer links.
- advising clients on the use of the AST mechanism to improve the efficiency
and reliability of applications making use of the AST mechanism.
- speaking on Event Driven Systems constructed on OpenVMS and
AST-related programming and internals topics
at DECUS Symposia in the United
States, Canada, Switzerland, France, and Turkey.
Presentations have included both one hour sessions and full