Simplified Failover Procedure - IBM Power Systems 775 Manual

3.4.1 Simplified failover procedure

This section describes the simplified failover procedure.
Disabling Primary EMS
Complete the following steps to disable the primary EMS:
1. Remove the following connections from CEC and FRAME:
a. rmhwconn cec
b. rmhwconn frame
2. Stop the following xCAT daemon and TEAL services (EMS and service nodes):
a. Linux: service xcatd stop
b. Linux: service teal stop
c. Linux: service teal_ll stop
d. AIX: stopsrc -s xcatd
e. AIX: stopsrc -s teal
f. AIX: stopsrc -s teal_ll
3. Unexport the following xCAT NFS directories:
exportfs -ua
4. Stop DB2 database:
a. su - xcatdb
b. db2 connect reset
c. db2 force applications all
d. db2 terminate
e. db2stop
f. exit
5. Unmount all shared disk file systems:
a. umount <directory_name>
b. (Optional) fuser -uxc <directory_name>
6. Varyoff xCAT shared volume group (AIX only):
varyoffvg xcatvg
7. Unconfigure service IP (also includes persistent configurations):
a. AIX: chdev -l en0 -a delalias4=<IP>,<NetMask>
b. Linux: ifconfig eth0:0 0.0.0.0 0.0.0.0
Enabling Primary EMS
Complete the following steps to enable the primary EMS:
1. Stop xCAT daemon and TEAL services:
a. Linux: service xcatd stop
b. Linux: service teal stop
c. Linux: service teal_ll stop
d. AIX: stopsrc -s xcatd
e. AIX: stopsrc -s teal
f. AIX: stopsrc -s teal_ll
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IBM Power Systems 775 for AIX and Linux HPC Solution