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IBM High Availability Cluster Multiprocessing

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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. IBM's HACMP product was first shipped in 1991 and is now in its 19th release - PowerHA SystemMirror for AIX 6.1.

HACMP can run on up to 32 computers or nodes, each of which is either actively running an application (active) or waiting to take over should another node fail (passive). Data on file systems can be shared between systems in the cluster.

HACMP relies heavily on IBM's Reliable Scalable Cluster Technology (RSCT). RSCT includes daemons which are responsible for monitoring the state of the cluster (for example, a node, NIC or network crash) and will coordinate the response to these events. HACMP is an RSCT aware client. RSCT is distributed with AIX.

Recent Versions

  • PowerHA 6.1, Rebranded again to IBM PowerHA SystemMirror for AIX, GA Oct 27 2009, [1]
    • Now in Standard and Enterprise Editions
    • EMC SRDF support
    • GLVM 2-site Configuration Wizard
    • Improvements to SMIT panels and File Collections
    • IPv6 support
  • HACMP 5.5, Rebranded to IBM PowerHA, GA Nov 2008, [2]
    • Asynchronous replication support
    • Updated support for DLPAR/CUOD to include support for IBM POWER5 and POWER6 processors
    • Support for LPAR mobility to relocate critical applications
    • PowerHA/XD PPRC support of Global Mirror when used with SAN Volume Controller
    • Function to allow PowerHA/XD PPRC to support multiple storage subsystems at each site
    • Better integration with the AIX operating system by avoiding modifications to the TCP/IP bringing up process
  • HACMP 5.4.1, Nov 2007, announcement
    • AIX Workload Partitions support (WPAR)
    • New GLVM monitoring
    • NFSv4 support improvements
  • HACMP 5.4, July 2006, announcement
    • Web-based GUI
    • Nondisruptive HACMP cluster startup, upgrades, and maintenance
  • HACMP 5.3, August 2005
  • HACMP 5.2, July 2004
  • HACMP 5.1, July 2003
  • HACMP 4.5, July 2002
  • HACMP 4.4, June 2000
  • HACMP 4.3
  • HAMCP 4.2

See also

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