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Brian Nordland

Brian Nordland

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  • A simplified single edition offering

  • Reduced data transfer during resynchronization with Geographic Mirroring Compression

  • Reduction in Time Required to Perform CRG Switchover for Selected Configurations

Note

Required PTF: PTF SI78996 (plus language PTFs) is a required PTF for PowerHA on IBM i 7.5.

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The PowerHA SystemMirror for i offering is simplified to have a single edition containing all functionality.

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titleUpgrading to PowerHA SystemMirror for i 7.5

When upgrading from a prior release, if 5770HAS option 1 is not installed, the manual installation of 5770HAS Option 1 is required either before or after the upgrade.

Since PowerHA 7.5 has a new product structure (including new SWMA PIDs), this requires an upgrade in e-config rather than in IBM Entitled System Support (ESS). The following behavior applies to upgrades:

  • If SWMA is active on the PowerHA entitlement for which you are upgrading, config adds the PowerHA 90-day SWMA PID for $0; then order placers can select the brand SWMA extensions.

  • If SWMA is not active on the PowerHA entitlement from which you are upgrading, config adds the after-license fee for one year of SWMA; then, order placers can select the brand SWMA extension.

Info

Note: Upgrades from PowerHA 7.4 and earlier Express or Standard Editions to PowerHA 7.5 will have an upgrade charge since PowerHA 7.5 is one edition with all functionality.

Reduced Data Transfer with Geographic Mirroring Compression
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title7.5 HA 5.1.2
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title7.4 HA 4.7.2

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With this enhancement, PowerHA can now compress geographic mirroring data during resynchronization reducing the data transfer required. In addition, on Power10 systems, PowerHA uses the on-chip NX GZIP accelerator if the NX feature is enabled, providing hardware accelerated compression. This enhancement will be available on June 24th, 2022 for both PowerHA 7.5 and 7.4.

Reduction in Time Required to Perform CRG Switchover for Selected Configurations
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title7.5 HA 5.0.1
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title7.4 HA 4.6.1
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title7.2 HA 3.8 (IBM i 7.3)

Previously, when performing a switchover of a device Cluster Resource Group (CRG), the job queue specified in the job description for the user performing the switchover was used to vary off and on the IASP. This may result in the switchover taking longer than expected. For example, if the job queue is held or only allows a specific number of active job at a time, the switchover may be held up for a long time. Previously, PowerHA included switchover progress monitoring that visually indicates a job submitted but not yet running to help identify these situations.

PowerHA has been enhanced so that planned switchovers or unplanned failovers will always use the QSYSNOMAX job queue for IASP vary on and off operations regardless of the user initiating the operation. This reduces the chance of a held job queue or hitting the restriction on the maximum number of active jobs in the subsystem, reducing the time required to perform the CRG switchover.

Note: This does not affect CRG user exit programs; the job queue referenced by the user profile parameter specified when creating or changing the CRG will continue to be used. The job queue specified in the user profile’s job description is used for submitting user exit programs regardless of the user initiating the planned switchover operation.

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Note: Above are highlights from this release. See the PowerHA Release notes for the full list of fixes and enhancements.