Content Comparison

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• Ability to configure PowerHA to switch many IP addresses in a single device CRG without custom exit programs with a new configuration object type, *IPA.

• Integrated switchover progress monitoring with enhanced notifications when action is required.

• Numerous performance improvements.

IP Address Switching

Status
colour Green title 7.4 HA 4.6.1

Previously, in a PowerHA environment, users could configure a server takeover IP address associated with an Independent Auxiliary Storage Pool (IASP) device in a device cluster resource group (CRG). This IP address follows the primary node in the CRG and enables users and applications to access the correct primary system at any point in time.

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This command adds an IP address object with a generated name to the device list of the resilient device cluster resource group MYCRG in the cluster. If MYCRG is switched over or failed over to a backup node, the IP address will be started on the new primary node. Additional IP addresses can be added to the same CRG with a similar command.

Integrated Switchover Progress Monitoring

Status
colour Green title 7.4 HA 4.6.1

Previously, PowerHA introduced switchover progress monitoring via a new command, Display CRG Activity (DSPCRGACT), which shows the progress of a switchover. With PowerHA 7.4 HA 4.7.1, this progress monitoring has been enhanced:

• Integrated into the CHGCRGPRI command to automatically display progress during a switchover.

• A new action required step indicates when a job queue is held or a subsystem is inactive.

Performance Improvements

Status
colour Green title 7.4 HA 4.6.1

Status
colour Purple title 7.2 HA 3.8

While PowerHA has always required minimal resources on nodes in the environment, PowerHA for 7.4 HA 4.6.1 and 7.2 HA 3.8 continues this trend by providing improved performance for many operations with the following enhancements:

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