TS/MP Release Supplement

ACS Subsystem

HP NonStop TS/MP Release Supplement—546055-006

1-22

PATHTCP4

The PATHTCP4 and the Java library components of Pathway/iTS 1.1 support the

Pathway domain name syntax in place of PATHMON name for

SCOBOL SEND and

DIALOG APIs. For compatibility purposes, the current name forms and their default

values have been maintained.

You are not required to make any changes to your SCOBOL application programs to

do sends to Pathway domain. If the PATHMON process name specified in the

SCOBOL SEND verb is part of a Pathway domain, the send will be processed by a

server in any PATHMON in the domain. If the specified PATHMON is not part of any

domain, the send will be processed by that PATHMON.

You can also replace the PATHMON process name with the domain name in the SEND

verbs.

Statistics Collection

You can collect and report statistics using PATHCOM exactly as done for TS/MP 2.0.

However, the values reported for TS/MP 2.3 (or later version) might not be identical to

the values reported for TS/MP 2.0 for the same application. The difference is because

of different collection mechanisms, operational dynamics, and changes to

management algorithms and some data points. The differences in statistical results

must be minimal.

Error Handling

The ACS subsystem provides the following error handling components.

ACS Auto-Restart

The ACS subsystem detects any failure of its core processes. All the core processes

on the processor are automatically restarted when any core process fails on that

processor. No manual intervention is required from the operators. Also, the Pathsend

requesters can continue to run without being restarted. To use the ACS

auto-restart feature, the Pathsend requesters must follow the guidelines described in

the Programming for Failure Recovery section of the

HP NonStop TS/MP Pathsend

and Server Programming Manual.

Pathsend Errors

Some TS/MP 2.0 errors are no longer generated but that does not cause compatibility

problems. New errors generated by the ACS subsystem can easily be handled by

applications and are highly unlikely to occur. The new errors always indicate that the

transaction has not been processed and that the transaction can be aborted, which is

the standard action for unhandled errors.