Chapter 9. Software support
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9.1.6 Performance Toolbox Parallel Extensions for AIX (PTPE)
As its name implies, PTPE extends the capabilities of Performance Toolbox
(PTX) or AIX by adding monitoring functions and statistics specific to the SP.
PTPE provides SP performance statistics from software, such as LoadLeveler
and IBM Virtual Shared Disk (VSD), and hardware components. These statistics
are available in live (current) and archived (historical) forms for use in supporting
both active monitoring and comparative analysis over time.
9.1.7 Subsystem communications support
The Communication Subsystems Support component contains Switch
software support. It contains adapter diagnostics, switch initialization and
fault-handling software, device driver and configuration methods, plus parallel
communications application programing interfaces (APIs).
Each node can be:
A communication path through the switch to other nodes.
A monitor of the switch hardware.
In control of the switch hardware for startup and, in case of error, execution of
any appropriate recovery action.
9.1.8 Network Time Protocol (NTP)
Handles synchronizing time-of-day clocks on your control workstation and
processor nodes. In PSSP 3.2, the public domain NTP 3.3 has been replaced
with AIX NTP 3.4.
9.1.9 System availability
To significantly improve system availability, PSSP also contains functions and
interfaces to other products that can help reduce unplanned outages and
minimize the impact of outages that do occur. These include:
System partitioning, which makes it possible to create a separate logical
system partition. It allows testing of different levels and PTFs on the operating
system, system software, or hardware. It also allows different production
environments to be concurrently executed for workload isolation.
Coexistence can reduce scheduled maintenance time. PSSP can coexist with
several releases within an SP partition, thus, allowing easier migration to new
software levels.
Node isolation, which removes an SP node from active duty and enables it to
be reintegrated without causing an SP Switch fault or disrupting switch traffic.
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