ClearPath IX Systems Installation and Configuration Guide

H
HBA
Abbreviation for host bus adapter.
Glossary
heartbeat
Message that is sent regularly by the Cluster Service on one node in a cluster to the Cluster
Service on an alternate node to detect failure.
heterogeneous multiprocessing (HMP)
A Unisys computing paradigm in which multiple dissimilar processors (for example, Intel
and custom CMOS processors) and operating system kernels (for example, Windows NT
and OS 2200) execute as a single server.
High-Performance Transaction Processing Interconnect (HTP/ic)
System software that provides the underlying connection between the ClearPath HMP
Windows NT node and the custom node for Open/OLTP client/server applications using the
FDDI link. HTP/ic facilitates communication to the HTP/x product and ultimately, the
Open/OLTP product on the custom node. HTP/ic is based on XATMI and OSI TP
standards.
High-Performance Transaction Processing for XATMI (HTP/x)
Unisys system software that supports the transaction processing protocols as defined in
ISO/IEC 10026-3. These protocols allow heterogeneous computer systems to communicate
in support of distributed transactions. The HTP/x interface supports access to the OSI-TP
functions required by the X/Open CAE specification of the XATMI Application
Programming Interface (XATMI API) and provides services to
• Initiate and accept or reject remote service requests both inside and outside of a global
transaction
• Send and receive data
• Prepare, commit, and roll back transactions.
High-Volume Transaction Processing (HVTIP)
An OS 2200 product used for applications that require a high rate of throughput and whose
processing can pass through an arbitrary sequence of subprograms. To maximize
performance, modular programs are executed in sequence from a special area of main
storage dedicated to Transaction Processing (TIP) applications. An HVTIP program library
is a TIP user file designated (through the TPUR utility) as a container for HVTIP program
banks. See also Transaction Processing (TIP).
HMP
See heterogeneous multiprocessing.
HMP Workstation
A PC, running Windows NT Workstation, that an operator uses to monitor and control all
nodes of a ClearPath IX server. X terminal emulation allows display of SPO/HMP Console
screens on the workstation for monitoring and control. Software hosted on the
workstation allows system management, system administration, and the viewing of user
documentation.
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