IBM RS/6000 SP, Руководство пользователя

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Chapter 7. Control workstations
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The primary and backup control workstations are also connected on a private
point-to-point network and a serial TTY link or target mode SCSI. The backup
control workstation assumes the IP address, IP aliases, and hardware address of
the primary control workstation. This lets client applications run without changes.
The client application, however, must initiate reconnects when a network
connection fails.
The SP data is stored in a separate volume group on the external disk storage.
The backup control workstation can run other unrelated applications if desired.
However, if the application on the backup control workstation takes significant
resources, that application may have to be stopped during failover and
reintegration periods.
7.3.2 Installation requirements
There are a couple of requirements for hardware and software that must be met
before you install the HACWS.
System requirements
In addition to the system requirements described in Section 7.2.2, “System
requirements” on page 199, the following are required:
򐂰 Two supported pSeries or RS/6000 workstations. Each of these systems
must have the same set of I/O required for control workstations as described
in Section 7.2.1, “Supported pSeries and RS/6000 workstations and servers”
on page 198. They can be different models, but the tty configuration must be
exactly the same on each control workstation. The disks should be of the
same type and configured the same way on both control workstations to allow
the hdiskx numbers to be consistent between the two control workstations.
򐂰 External disk storage that is supported by HACMP and the control
workstation being used. Two external disk controllers and mirrored disks are
strongly recommended but not required. If a single external disk controller is
used, the control workstation single point of failure has not been eliminated
but moved to the disk subsystem.
򐂰 The HACWS connectivity feature (F/C 1245) on each SP frame.
򐂰 An additional RS232 connection for HACMP communication is needed if
target mode SCSI is not being used for the HACMP communication.
Software requirements
The software requirements for the control workstation include:
򐂰
Two AIX server licenses (AIX Version 4.3.3 is required for PSSP Version 3.2).