Changes From Pssp 1.2 To Pssp - IBM RS/6000 SP Problem Determination Manual

This soft copy for use by IBM employees only.

2.2.13 Changes from PSSP 1.2 to PSSP 2.1

The following are the changes made in going from AIX Version 3.2.5 to AIX
Version 4.1:
System partitioning supports several system partitions running AIX
Version 3.2.5 or AIX Version 4.1 to run as logical systems within a single
SP system. This provides the ability to test new software, isolate
workloads to dedicated resources, and run different applications on
different partitions as required by different segments of the business.
−
Node isolation from the switch network
Node isolation provides a mechanism to isolate nodes from the switch
fabric for repair, replacement, or reboot, without affecting end users,
applications, or switch traffic on the remainder of the SP system or
system partition.
−
Installation support
Improved installation support is provided by the use of the AIX Version 4
Network Installation Management (NIM).
−
Improved log management
Log management provides a single point of control to assist customers
in configuring, archiving, and maintaining various system logs on
individual nodes. Customers can also specify additional logs that may
be used by their applications.
−
Enhanced security features
PSSP 2.1 increased the maximum ticket life to 30 days for Kerberos, and
enhancements to address any host by any of its host names.
• VSD performance improvements
With standard VSD, database applications could only stripe data across
multiple disks associated with one node. With Hashed Shared Disk (HSD),
the capability to stripe across nodes has been added, returning more data to
the application faster than serial reads.
•
Engineering and scientific computing
The following software products have been upgraded with new functions to
extend support for engineering and scientific computing:
−
IBM Parallel Environment for AIX Version 2.1 provides support for
parallel applications on AIX Version 4.1.
−
IBM Parallel ESSL for AIX 4.1.4 improves performance of engineering and
scientific applications on the RS/6000 SP Systems.
−
IBM PVMe for AIX supports parallel execution of applications on AIX
version 4.1.4.
• /usr client and /usr server
/usr client and /usr server, which were supported under AIX Version 3.2.5,
are not supported under the new version.
•
Primary dump device
Primary dump space, which was defined as /dev/hd7 under AIX Version
3.2.5, is now defined as paging space (/dev/hd6) under the new version.
Chapter 2. The Installation Process
19