SNAX/APC Application Programming Manual

Glossary
SNAX/APC Application Programming Manual—138786
Glossary-13
SYSGEN
SYSGEN. Tandem system generation program used to tailor the operating system for a
specific hardware and software configuration. SYSGEN is a subset of Install that
creates a system image only. The SYSGEN process can be divided into three phases:
configuring the system, generating the operating system, and installing the operating
system.
Synchronization. The process of ensuring that all TPs involved in a transaction make the
required changes to their protected resources (usually a database) at the same time and
without failure.
Sync Point. A point in a distributed transaction at which resource changes are synchronized.
Both TPs agree to either commit to, or back out the changes. Sync Point is also used as
a shortened version of the term Sync Point Level 2.
Sync Point Level 2. There are two levels of synchronization in APPC, a base level known as
Confirm, and a higher, second level known as Sync Point Level 2 or just Sync Point.
Sync Point Manager. A component of the presentation services layer of SNA, responsible
for the management of Sync Point protocol.
Sync Point Services. An IBM-architected APPC option. This option includes components
such as the Sync Point Manager, and the set of verbs that includes COMMIT and
FORGET.
Sync Point Support. The Tandem implementation of Sync Point Services.
system area network (SAN). (1) A wormhole-routed, full-duplex, packet-switched,
point-to-point network designed with special attention to reducing latency and ensuring
reliability. The ServerNet SAN provides the communication path used for interprocessor
messages and for communication between processors and I/O devices. (2) A low-cost,
high-speed network, contained within a system, that connects processors to each other
and to ServerNet addressable controllers (SACs).
System Services Control Point (SSCP). The focal point within an SNA network for
managing the configuration, coordinating network-operator and problem-determination
requests, and providing directory support and other session services for the users of the
network. Multiple SSCPs, cooperating as peers, can divide the network into domains of
control, with each SSCP having a hierarchical control relationship to the PUs and LUs
within its domain.
TACL. See Tandem Advanced Command Language (TACL)
.
Tandem Advanced Command Language (TACL). The user interface to the Tandem
NonStop Kernel operating system. The TACL product is both a command interpreter
and a command language. Users can write TACL programs that perform complex tasks
simply or provide a consistent user interface across independently programmed
applications.
Tandem-specific verbs. Verbs implemented by Tandem that are not defined in LU 6.2
architecture. SNAX/APC implements two such verbs: TP-START and TP-END.