Start of changeIBM PowerHA SystemMirror for iEnd of change version support

A PowerHA® version represents the level of PowerHA for i function available on a cluster.

Enhanced IBM PowerHA SystemMirror for i licensed program number (5770-HAS)

Start of changeIn 7.2, IBM® PowerHA SystemMirror® for i licensed program was enhanced. More function was added to the graphical interface, command-line interface, and APIs. This new function can assist administrators in configuring and managing high availability solutions. Refer to the following topics for details on the features of each of these interfaces: End of change

IBM PowerHA SystemMirror for i version support

A PowerHA version represents the level of IBM PowerHA SystemMirror for i function available on a cluster. It is displayed in the form, x.y. For example, version 2.0 is a valid PowerHA version.

Start of changeThere are two PowerHA versions:
Potential PowerHA version
Represents the version of IBM PowerHA SystemMirror for i installed on a node. The potential PowerHA is the highest PowerHA version the node can currently support. The potential PowerHA version is updated when a new version of IBM PowerHA SystemMirror for i is installed.
Current PowerHA version
Represents the version currently being used for all cluster operations. This is the version of communications between the nodes in the cluster. To take advantage of all available new PowerHA function, every node in the cluster needs to be at the latest potential PowerHA version and the current PowerHA version must be adjusted to match.
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Compatibility of PowerHA versions

Start of changeIBM PowerHA SystemMirror for i supports up to a three version difference among nodes. Nodes with a potential PowerHA version of at least equal to the current PowerHA version, but not more than three versions higher than the current PowerHA version, are compatible. For example, if the current PowerHA version is 2.1, nodes with a potential PowerHA version of at least 2.1 and less than 6.0 are compatible.End of change

Setting the current PowerHA version

The current PowerHA version is initially set when the cluster is created with the Create Cluster (CRTCLU) command. If the cluster exists when IBM PowerHA SystemMirror for i is installed, the current PowerHA version is set to lowest current PowerHA version supported by the node. Adjusting the current PowerHA version is done with the Change Cluster Version (CHGCLUVER) command. The current PowerHA version can only be adjusted if the potential PowerHA version of each node in the cluster supports the version. The current PowerHA version cannot be changed back to a lower version. Once the current PowerHA version is adjusted to a higher version, new IBM PowerHA SystemMirror for i function is made available.

The cluster version identifies the communication level of the nodes in the cluster, the ability of a node to join the cluster and the ability of the cluster to support new function. Refer to the information about compatibility between cluster versions and IBM I series releases to verify your PowerHA, clusters and operating system are compatible.

Summary of new functions by PowerHA version

It is implied that functions available include functions available at previous versions.

Function available with PowerHA version 1.0, requires cluster version 6.0.

New function available with PowerHA version 2.0, requires cluster version 7.0.

Functions available with PowerHA version 1.0

Functions available with PowerHA version 1.0, which requires current cluster version 6, are:

Support for Cross Site Mirroring (XSM):

  • Geographic Mirroring
  • Metro Mirror
  • Global Mirror
  • FlashCopy®

IBM PowerHA SystemMirror for i commands:

IBM PowerHA SystemMirror for i application programming interfaces:

IBM PowerHA SystemMirror for i graphical user interfaces:
  • Cluster Resource Services
  • High Availability Solutions Manager

Functions available with PowerHA version 2.0

Functions available with PowerHA version 2.0, which requires current cluster version 7 are:

Support for PowerHA versions:
Support for asynchronous geographic mirroring:
Support for enhanced cluster node failure detection:

IPv6 support added

The following functions have been enhanced and now support IPv6.
Start of change Support for printer devices and authorization lists in Cluster Administrative Domain: End of change
Support for switched logical units
  • Support is now available for switched logical units. See the Switched logical units topic for additional information.

PowerHA server job

When clustering is active and the current PowerHA version is 2.0 or higher, the PowerHA server job will be running. This job is named QHASVR and runs in the QSYSWRK subsystem under the QHAUSRPRF user profile.

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Functions available with PowerHA version 2.1

Functions available with PowerHA version 2.1, which requires current cluster version 7 are:

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Functions available with PowerHA version 2.2

Functions available with PowerHA version 2.2, which requires current cluster version 7 are:

  • All DS8000®, SAN Volume Controller, and Storwize® V7000 and V3700 PowerHA functionality is now available through the new PowerHA GUI, which is available under IBM Navigator for i.
  • Start of changeEnhanced command interface, Work with Monitored Resources Entries (MRE) (WRKCADMRE) has been created, offering improved sorting, filtering, and searching capabilities for large number of MREs. End of change
  • Administrative domain entries can be added or removed when not all nodes are active in the cluster.
  • Administrative domain, FlashCopy, and copy description functions are now fully cluster enabled so that all work can be initiated from any active cluster node.
  • Geographic mirroring synchronization priority can be changed while the IASP is varied on.
  • PowerHA submitted jobs are now associated with the QCSTJOBD job description instead of the QBATCH job description.
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Functions available with PowerHA version 3.0

Functions available with PowerHA version 3.0, which requires current cluster version 8 are:

  • Cluster administrative domain monitored resource limit raised to 45,000. So cluster administrative domain can synchronize 45,000 specific objects.
  • Cluster administrative domain with IBM PowerHA SystemMirror for i now supports synchronization of object authority and ownership. New object attributes of object owner, authority entry, authorization list and primary group were added to some monitored resource entries.
  • IBM PowerHA for i Express® Edition edition will support DS8000 HyperSwap®. The following commands have been added to support HyperSwap:
  • The High Availability Solutions Manager graphical interface and Cluster Resource Services graphical interface are no longer supported. Use the PowerHA graphical interface.
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Functions available with PowerHA version 3.1

Functions available with PowerHA version 3.1, which requires current cluster version 8 are:

Parent topic: High availability management