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# IBM PowerHA (formerly HACMP) is IBM's solution for high-availability clusters on the AIX
# Unix and Linux for IBM System p platforms and stands for High Availability Cluster
# Multiprocessing.
# PowerHA can run on up to 32 computers or nodes, each of which is either actively running
# an application (active) or waiting to take over when another node fails (passive). Data
# on file systems can be shared between systems in the cluster.
# - PowerHA 7.1 was released in 2010 and uses the Cluster Aware AIX (CAA) infrastructure
# available in AIX V6.1 TL 6 and AIX 7.1
# - PowerHA 6.1, Rebranded again to IBM PowerHA SystemMirror for AIX, GA Oct 27 2009
# - HACMP 5.5, Rebranded to IBM PowerHA, GA Nov 2008
# - HACMP 5.4.1, Nov 2007
# - HACMP 5.4, July 2006
# - HACMP 5.3, August 2005
# [...]
# HACMP SPECIFICS
# ------------------------------------------------------------------------------------------
# * Heartbeat is implemented via a shared Heartbeat disk
# * Fallback policy: possibility of automatic fallback
# * File collection synchronization
# * Cluster validation test (DON'T RUN AS IT MAKES A FULL SET OF TESTS INCLUDING CRASH, etc)
# Show cluster state (continuous output)
# ------------------------------------------------------------------------------------------
root@<server>:/root#> clstat [ -r interval ]
Cluster status: stable | unstable | reconfig
# Show cluster state (not continuous output)
# ------------------------------------------------------------------------------------------
root@<server>:/root#> cldump
# Check cluster daemons
# ------------------------------------------------------------------------------------------
root@<server>:/root#> lssrc -g cluster
Subsystem Group PID Status
clstrmgrES cluster 50136 active
clinfoES cluster 139308 active
# Reduced information about ressource groups
# ------------------------------------------------------------------------------------------
root@<server>:/root#> clRGinfo
# RG (Ressource Group): Formed by IP, LVM, AS (application server) & AM (application monitor)
#
# Ressource Group parameters:
# - Startup policy
# - Failover policy
# - Fallback policy
# - Site policy: for long-distance intersite clusters
# Complete information about application servers
# ------------------------------------------------------------------------------------------
root@<server>:/root#> cldisp
# ------------------------------------------------------------------------------------------
root@<server>:/root#> smitty [ hacmp | powerha ]
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