IBM RS/6000 SP, Problem Determination Manual

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This soft copy for use by IBM employees only.
If there are problems with the heartbeat daemons after System Partitioning, use
the same techniques that have already been described in this chapter.
If there is a problem in one partition, it is possible to work just with the relevant
subsystem, rather than with all of them. In the example, the following
commands can be run to stop and start the heartbeat daemon:
# stopsrc -s hb.spcws
# startsrc -s hb.spcws
5.5.3 Daemons and Scripts
As with the SDR daemons, the SRC ensures that multiple instances of the
daemons are not running at the same time. It uses the following scripts to start
the respective daemons:
/usr/lpp/ssp/bin/hb
/usr/lpp/ssp/bin/hr
These scripts can be used manually to control the daemons and there are many
options that can be used. When using these, be careful not to start multiple
daemons because this will result in unpredictable
host_responds information.
In the example, the heartbeat daemon can be put into debug mode on the spcws
partition by issuing the following commands:
# export SP_NAME=spcws
# /usr/lpp/ssp/bin/hb debug
This heartbeat daemon will now send all stdout to the console to make debug
work easier when experiencing problems with this subsystem. Since stderr
always goes to the console by default, this may provide additional information
that assists in resolving heartbeat problems. To turn this option off, issue:
# /usr/lpp/ssp/bin/hb debug off
Rather than sending this output to the console, it is possible to send this output
to a file by changing an attribute in the ODM. The SRC references an object
class in the ODM called
SRCsubsys which contains information about all the
subsystems under its control. The following command can be run for any
partition:
# odmget -q
″
subsysname=hb.<syspar_name>
″
SRCsubsys
For the example of the partition spcws, the output is:
SRCsubsys:
subsysname =
″
hb.spcws
″
synonym =
″″
cmdargs =
″
-spname spcws -splevel PSSP-2.1
″
path =
″ /
usr/lpp/ssp/bin/hb
″
uid = 0
auditid = 0
standin =
″ /
dev/null
″
standout =
″ /
dev/null
″
standerr =
″ /
dev/console
″
action = 2
multi = 0
contact = 3
svrkey = 0
svrmtype = 0
priority = 1
signorm = 0
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SP PD Guide