Specifications

Configuring the Hardware and Installing Windows NT 29
Information about installing and using PowerXtend with Netfinity Manager is
found in
Netfinity Server Management, SG24-5208.
PowerChute and PowerXtend must be installed on both the Netfinity Manager and
any machine whose UPS information you want to manage via Netfinity Manager.
PowerChute
plus must be installed before installing PowerXtend.
You can also use the PowerXtend module and the Netfinity Manager with the
Alert Manager to execute a batch file and shut down your system if the utility
power fails. But you have to decide if you want to use PowerChute
plus or
Netfinity Manager to shut down your system.
2.3 IBM Netfinity 7000 Processor Upgrades
You may have to upgrade your system with more processors and memory, and
that applies usually to an SAP R/3 system, depending on your sizing
recommendations and your system configuration. First, let us consider the
processor cache sizes.
2.3.1 Processor Cache Sizes in SMP Environments
SMP systems provide better performance by adding additional processors to the
system. This performance growth is not increasing proportionally with the number
of added processors. One problem of SMP systems is the
shared memory
problem
. All processors use a single source of memory. Only one copy of the
operating system is running on the system.
If a processor has access to the main memory and another processor needs
access to the memory then it has to wait until the first processor is finished with
the memory. This problem can be reduced by using cache memory. Cache
memory holds recently accessed data. If a processor needs data that was
recently accessed it is possible that the data might still be in the cache memory. If
the processor found the data in the cache it does not need access to the main
memory. Every time the processor finds data in the cache is called
cache hit . The
cache hit rate can be improved by increasing the size of the cache memory used
by each processor. This is especially important for SAP R/3 integrations with a
large amount of memory in SMP environments. On the other hand, there is the
consideration that cache memory is usually expensive.
The Pentium Pro processors contain a 5.5 million transistor processor core with
16 KB primary cache (first level cache), and a 512 KB or 1 MB secondary cache
(second level cache).
Do not configure Netfinity Manager to issue this action if
PowerChute
plus is already configured to automatically perform the
shutdown. If Netfinity Manager and PowerChute are both
configured to initiate a shutdown in response to the same event,
the shutdown delay that occurs may not be the one you expect,
especially if you change the delay through one of the interfaces but
are not aware of the configuration in the other interface.
Warning