IBM AIX HACMP SG24-5131-00, Hardware User Manual

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Cluster Testing
137
• Verify that all sharedvg file systems and paging spaces are accessible (
df
-k
and
lsps -a
).
6.2.2 Node Failure / Reintegration
The following sections deal with issues of node failure and reintegration.
6.2.2.1 AIX Crash
Perform the following steps in the event of an AIX crash:
• Check, by way of the verification commands, that all the Nodes in the
cluster are up and running.
• Optional: Prune the error log on NodeF (
errclear 0
).
• If NodeF is an SMP, you may want to set the fast reboot switch (
mpcfg -cf
11 1
).
• Monitor cluster logfiles on NodeT.
• Crash NodeF by entering
cat /etc/hosts > /dev/kmem
. (The LED on NodeF
will display 888.)
• The OS failure on NodeF will cause a node failover to NodeT.
• Verify that failover has occurred (
netstat -i
and
ping
for networks,
lsvg -o
and
vi
of a test file for volume groups, and
ps -U <appuid
> for application
processes).
• Power cycle NodeF. If HACMP is not configured to start from /etc/inittab,
(on restart) start HACMP on NodeF (
smit clstart
). NodeF will take back
its cascading Resource Groups.
• Verify that re-integration has occurred (
netstat -i
and
ping
for networks,
lsvg -o
and
vi
of a test file for volume groups, and
ps -U <appuid
> for
application processes).
6.2.2.2 CPU Failure
Perform the following steps in the event of CPU failure:
• Check, by way of the verification commands, that all the Nodes in the
cluster are up and running.
• Optional: Prune the error log on NodeF (
errclear 0
).
• If NodeF is an SMP, you may want to set the fast reboot switch (
mpcfg -cf
11 1
).
• Monitor cluster logfiles on NodeT.
• Power off NodeF. This will cause a node failover to NodeT.