IBM RS/6000 SP, Руководство по определению проблем

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Do not restore the original SDR if the affected nodes have been rebooted and
there are mixed partitions running different version of AIX and POWERparallel
System Support Programs. This situation is not supported and the effect of
running in this type of environment is unpredictable at present for compatibility
reasons. Attempting to resolve these issues is beyond the scope of this book.
5.4 SDR Reorganization
The previous section mentioned that SDR was restructured during the apply of
the System Partitioning. It is important to know how this is done in some detail
in order to resolve any outstanding problems that may arise.
5.4.1 SDR Daemons
The SDR contains all the RS/6000 SP-specific configuration information. It is a
central repository that only resides on the Control Workstation. Access to this
information is essential for all the nodes to function properly. If there are any
SDR or SDR error messages, it is a good idea to check that the SDR daemon
(sdrd) is running. This can be done by running the following command on the
Control Workstation:
# ps -ef | grep sdr
In the example that has been used so far, the output for the process name from
the preceding command should look like:
/usr/lpp/ssp/bin/sdrd 9.180.6.199
/usr/lpp/ssp/bin/sdrd 9.180.6.198
Alternatively, the following command can be run to check the same information:
# lssrc -g sdr
Here is an example of the output from this command:
Subsystem Group PID Status
sdr.spcws sdr 10704 active
sdr.sppart2 sdr 10962 active
The subsystem names are uniquely identified by using the name of the partition,
rather than the IP address, as a suffix.
In PSSP 2.1, there is one SDR daemon for each partition. Each daemon is
uniquely identified by an IP address. In the case of the
default partition, this is
the IP address associated with the hostname of the Control Workstation. In the
case of the other partitions, this address is the IP alias that was defined for each
partition.
A look at the /etc/services shows that the SDR daemons are listening on TCP
port 5712. Each node can connect to this port by specifying the IP address
associated with its partition (the IP alias or the
hostname of the Control
Workstation) and making a socket connection. In this way, each SDR daemon is
able to communicate only with the nodes in the partition that it associates with.
In PSSP 2.1, the SDR daemons are under SRC master control. The inittab entry
should look like the following:
sdrd:2:once:/usr/bin/startsrc -g sdr
Chapter 5. System Partitioning
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