IBM PowerHA for AIX, V5.5 helps achieve business continuity that reliable hardware alone cannot provide

IBM United States Software Announcement 208-313
October 7, 2008

 ENUS208-313.PDF (127KB)

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Overview Overview Offering Information Offering Information
Key prerequisites Key prerequisites Publications Publications
Planned availability dates Planned availability dates Technical information Technical information
Description Description Ordering information Ordering information
Product positioning Product positioning Terms and conditions Terms and conditions
Reference information Reference information Prices Prices
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At a glance
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IBM® PowerHA (formerly HACMPtm) V5 offers robust high availability and disaster recovery for IBM Power Systems, System p®, and System i® customers with mission-critical applications.

New features in Version 5.5 include:

  • Asynchronous replication support
  • Updated support for DLPAR/CUOD to include support for IBM POWER5tm and POWER6tm 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 TC/IP bringing up process

WebSMIT enhancements include the ability:

  • To run the WebSMIT service from a stand-alone machine outside of the cluster
  • To monitor and control multiple clusters from a single, integrated session using the enhanced WebSMIT interface

The optional features PowerHA/XD and PowerHA Smart Assist provide high availability disaster recovery solutions for your business on the AIX operating system.

For ordering, contact your IBM representative, an IBM Business Partner, or IBM Americas Call Centers at 800-IBM-CALL (Reference: YE001).

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Formerly IBM High Availability Cluster Multiprocessing (HACMP), IBM PowerHA1 represents a new name, but the same premier high availability product. The renaming is to align HACMP with the new IBM Power Systems Software initiative.

PowerHA is designed by IBM to provide integrated resiliency for AIX environments. For over a decade, PowerHA has been providing reliable monitoring, failure detection, and automated failover for 24 x 7 business application environments.

PowerHA/XD Extended Distance feature now enables native integrated unlimited distance data mirroring via Geographic Logic Volume Manager (GLVM) asynchronous mode and integrated support for Storage Volume Controller (SVC) Global Mirror for IBM SAN support, for asynchronous mirroring. Asynchronous mirroring enables you to replicate your data to a remote location, which enables you to in-source your disaster recovery operations. Now more than ever, our clients are in-sourcing their disaster recovery operations due to the need for an RPO (recovery point objective) of near zero.

And finally, WebSMIT Gateway enables you to manage your HA/DR cluster from a system outside of the cluster. PowerHA V5.5 is another in a series of investments designed to give you application and data resiliency for your AIX environments. If you want IBM-designed resiliency for the AIX operating system, this is the product offering for you.

PowerHA V5.5 brings together the strengths of IBM Power Systems and TotalStorage® design and development to provide you with a single, world-class source of protection for your mission-critical applications and data.

PowerHA V5.5: Simple. Fast. Goes the distance.


  • A Web-based GUI now enables multiple cluster management from a single console on a node that is outside of the cluster domains.

    1 PowerHA is a follow-on release to HACMP 5.4.

  • Support for IPv6 service and persistent address configuration and recovery enables early adoption of the latest IPv6 networking standard.


  • The capability to configure and maintain HA/DR clusters and applications without stopping them reduces application outages.
  • Fast failure detection action with PowerHA helps to minimize outages.
  • Smart Assists help streamline PowerHA implementation in many popular application environments.

Goes the distance:

  • Enables native integrated unlimited distance data mirroring via GLVM asynchronous mode
  • Adds integrated support for SVC Global Mirror

For complete IBM PowerHA information, send an e-mail to or visit

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Key prerequisites
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  • AIX V5.3 or V6.1, or later, on Power Systems, System p, and System i servers with adequate slots for your disk and network adapters in a no-single-point-of-failure configuration

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Planned availability dates
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November 14, 2008: PowerHA for AIX, V5.5

March 27, 2009: GLVM Asynchronous Support

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PowerHA for AIX helps provide availability of applications needed to support your On Demand Business. PowerHA V5.5 contains features to make the product even simpler, faster, and more flexible to integrate into IBM or third-party application environments. PowerHA "goes the distance" by including new AIX geographic mirroring support for remotely located cluster configurations.

PowerHA provides base services for cluster node membership, system management, configuration integrity and control, and failover and recovery for applications. PowerHA clusters with both nonconcurrent and concurrent access can contain up to 32 nodes. A node is an AIX operating system image, and it may be a Power System, System p, or System i server or an LPAR of an applicable Power System, System p, or System i server.

Easy-to-use status and monitoring facilities are included. Scalability provides these capabilities across multiple clusters. Users can customize PowerHA events and monitor their applications. PowerHA V5 fully supports administration of AIX Enhanced Concurrent Mode, thus providing concurrent shared-access management for all supported disk subsystems.

PowerHA provides ease-of-use features to speed configuration of your cluster for a variety of application environments. Whether your objective for availability is at the storage level (such as ESS or SVC), volume group or logical volume level (such as LVM), clustered file system level (such as with GPFStm), application level (such as DB2®, Oracle, or WebSphere®), or site level (such as to support disaster recovery), PowerHA has features and options to assist you with successful integration into your environment. After your cluster is configured, the changes are synchronized across all nodes and the cluster can be monitored easily with methods appropriate to your environment.

The optional PowerHA/XD and PowerHA Smart Assist features are available for an additional price, provide additional automated data backup, disaster recovery, and database environment configuration assistance to help protect your business, and are described in following sections.

All of the facilities of PowerHA are available for and with IBM's System p Capacity on Demand (CoD) offerings. This enables you to configure clusters that are scalable and to easily expand clusters' CPU and memory capacity as the need arises, without having to pay upfront for hardware that is not yet used.

V5.5 highlights

PowerHA V5.5 includes enhancements that improve ease of use, performance, and geographic distance capabilities.

Features that make PowerHA V5 simple:

  • Web-based GUI: WebSMIT enables Web-based cluster management for configuring, monitoring, and managing clusters from the same management console. You can now view multiple clusters from one single, consistent interface. You can also view the cluster configuration and status simultaneously.
  • Resource group management utility improvements: Enhancements make it easy for you to move resource groups for cluster management and to maintain previously configured behavior for a resource group, including priority override handling.
  • Verification enhancements: The cluster verification functionality, which validates your preproduction cluster environment, is upgraded to include a number of customer-requested enhancements. Automated nightly cluster verification reduces the risk that a change to the cluster may interfere with future cluster operation or failover.
  • Enhancements for Smart Assists:
    • PowerHA Application Integration provides a common infrastructure that can be used by all Smart Assists, as well as by the Cluster Test Tool. This enables a more rapid and consistent deployment of future Smart Assists.
    • Oracle Smart Assist was enhanced to self-configure PowerHA to monitor the entire Oracle process stack, including the Oracle Listener, and provide failover capabilities for the Oracle database.
    • Discovery of DB2 and WebSphere components is performed automatically by the PowerHA Smart Assist software and is no longer a separate step in the process.
    • A General Application Smart Assist is provided to help developers more easily construct Smart Assists of their own (applications other than the three that have their own Smart Assists). This program is similar to the Two-Node Configuration Assistant, but is not limited to two nodes. A Smart Assist Developer's Guide is also provided; this includes a sample program for a Smart Assist and information on using the Smart Assist Framework and API.

Features that make PowerHA V5 faster:

  • Nondisruptive startup and upgrade: Moving applications into a highly available environment with PowerHA is now even easier through the power of nondisruptive installation, configuration, and upgrade. PowerHA V5.5 no longer requires a system shutdown after installation, and you may apply PowerHA service and upgrades without disrupting production applications. The "Forced down handling" feature of PowerHA V5.5 provides a building block for nondisruptive upgrades of PowerHA.
  • Fast Failure Detection on node failure: This facility gives you an option for even higher availability and less downtime by quicker recognition of node halt events by integrating with the AIX halt command. Node failures are realized among the nodes in the cluster within one missed heartbeat period. This method requires that you configure a disk heartbeating network.

Features that enhance geographic distance capability:

  • Metro Mirror enhancements: You can now integrate the disaster recovery functionality of PowerHA/XD into your two-site cluster, utilizing the data mirroring functions resident within DS8000tm, DS6000tm, and ESS800 storage devices. Support is also now provided for intermixed environments.
  • IP Address Failover on Geographic Networks: This feature enables you to manage and move network communications between disparate sites, allowing you to takeover IP workloads at backup site locations.
  • PowerHA/XD GLVM Multi-Link: GLVM now supports up to four networks, providing improved protection for data mirroring and allowing replication to continue in the event of a network failure. You can take advantage of higher aggregate network bandwidth using this feature where more than one network is available, thus improving mirroring performance across sites.
  • PowerHA/XD GLVM Concurrent mode access: Concurrent application access in a disaster recovery environment is now available through PowerHA/XD GLVM, allowing multiple node application processing within a production site, while still being able to back up to a secondary site.

Optional PowerHA/XD feature for ESS, DS, and SVC Metro Mirror, Geographic LVMS, and IP-based mirroring configurations

This optional feature of PowerHA V5 offers, in one package, multiple technologies for achieving long distance data mirror, failover, and resynchronization:

  • PowerHA/XD GLVM is an IP-based mirroring technology. PowerHA/XD GLVM data replication is built upon the AIX Logical Volume Manager (LVM), using it to drive replication and synchronization of AIX logical volumes. For additional information regarding GLVM, refer to Software Announcement 205-085, dated April 12, 2005.
  • PowerHA/XD supports ESS, IBM TotalStorage, and SVC Metro Mirror (formerly known as Peer-to-Peer Remote Copy (PPRC)), providing automatic failover of disks that are configured as PPRC pairs, creating a powerful disaster recovery solution for customers on ESS, DS8000, or SVC. PowerHA/XD automates the management of Metro Mirror, minimizes recovery time after an outage, and monitors your clustered environment to ensure mirroring of critical data is maintained at all times.
  • HACMP/XD IP-based mirroring known as HAGEO has been replaced by PowerHA/XD GLVM V5.5. GLVM offers all of the features of the former HAGEO technology while being much easier to configure, more reliable, and better integrated with PowerHA as well as the native AIX LVM. Customers currently using HAGEO are recommended to develop a strategy for moving from HAGEO to GLVM.

Data synchronization during production, failover, recovery, and restoration is provided.

Optional PowerHA Smart Assist feature

PowerHA V5 offers four PowerHA Smart Assist applications to help you easily integrate these applications into an PowerHA cluster:

  • Smart Assist for DB2 extends an existing PowerHA configuration to include monitoring and recovery support for DB2 Universal Databasetm (UDB) Enterprise Server Edition.
  • Smart Assist for Oracle provides assistance for installing the Oracle Application Server 10g (9.0.4) (AS10g) Cold Failover Cluster solution on the AIX operating system.
  • Smart Assist for WebSphere has been updated and improved for HACMP V5.5. It extends an existing PowerHA configuration to include monitoring and recovery support for various WebSphere components, including WebSphere Application Servers and WebSphere Application Server Network Deployment (Deployment Manager). Smart Assist for WebSphere now has a SMIT user interface with options to quickly configure different types of typical cluster configurations.
  • A new General Application Smart Assist is provided for quicker configuration of your application with PowerHA (applications other than the three that have their own Smart Assists). This program is similar to the Two-Node Configuration Assistant, but is not limited to two nodes. A Smart Assist Developer's Guide is also provided; this includes a sample program for a Smart Assist and information on using the Smart Assist Framework and API.

PowerHA and Smart Assist increase the availability of a database solution by:

  • Monitoring the Deployment Manager and automatically restarting it on backup servers
  • Monitoring critical services (such as a TDS server) and automatically restarting them on backup servers if they fail
  • Helping to ensure that all necessary system resources (for example, storage devices and IP addresses) are configured and made available on backup servers in support of application migration

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Product positioning
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PowerHA for AIX is the IBM high availability solution designed to minimize downtime, planned or unplanned.

The prospective customer for PowerHA solutions is any enterprise with requirements to keep business-critical applications and systems operational 7 days per week, 24 hours per day. A PowerHA solution helps you avoid downtime; enables prompt recovery from any hardware, network, and application failures; and also gives you the means to take down an individual server (node) for planned maintenance and upgrades without having to take down the entire cluster.

High availability is a growing business need across all industries. Customers in the following industries may benefit from PowerHA solutions:

  • Finance/Banking
  • Retail (including online and catalog sales)
  • Healthcare/Insurance
  • Telco/Utilities/Media
  • Distribution/Process
  • Manufacturing
  • Education

In addition, customers utilizing the following types of applications may benefit from a PowerHA solution:

  • Database/OLTP
  • Enterprise resource planning
  • Network computing
  • Business intelligence
  • Any customer application that utilizes any combination of disks and networks

The PowerHA/XD feature is available for customers with business-critical data who want to mirror data between separate sites to aid in disaster recovery. This may appeal to businesses of any size, with multiple sites or regional operations, or wherever decentralization of data is desired.

PowerHA is an attractive, high availability solution for small and medium-sized enterprises, and for small and medium-sized business units of large enterprises.

In addition to providing high availability, PowerHA V5.5 can also be configured to provide loosely coupled multiprocessing services. These configurations allow workload to be spread across multiple Power Systems servers, sharing the disk and processor resources of the clustered nodes. This clustered approach, along with the capability of application failover and recovery/restart provided by PowerHA V5.5, offers additional levels of high availability processing for customer-critical environments. The Concurrent Resource Manager function of PowerHA V5.5 provides an open API that applications can utilize to get concurrent access to a shared disk.

Positioning PowerHA and other cluster servers

PowerHA is a robust offering for mission-critical availability for up to 32 nodes. It is IBM's strategic high availability offering designed and tuned for Power Systems and System p servers running the AIX operating system and IBM TotalStorage solutions.

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Reference information
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Refer to Software Announcement 206-176, dated July 25, 2006 (HACMP 5.4.0 announcement).

Refer to Software Announcement 207-279, dated November 06, 2007 (HACMP 5.4.1 announcement).

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Product identification number
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Program PID     Maintenance           Maintenance
number          1 Year PID number     3 Year PID number
5765-F62          5660-HMP            5662-HMP
                  5661-HMP            5663-HMP

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Program number
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Program number               Program name
5765-F62         PowerHA for AIX, V5.5
                 (formerly known as HACMP)
5660-HMP         PowerHA for AIX SW Maintenance 1 Yr
5661-HMP         PowerHA for AIX SW Maintenance 1 Yr AL
5662-HMP         PowerHA for AIX SW Maintenance 3 Yr
5663-HMP         PowerHA for AIX SW Maintenance 3 Yr RNWL
5664-HMP         PowerHA for AIX SW Maintenance 3 Yr AL

PowerHA V5 product description and key features

  • Recovery flexibility: PowerHA clusters can be configured to meet complicated application availability and recovery needs. PowerHA configurations can include mutual takeover or standby takeover recovery processes. Mutual takeover configurations allow all servers to be active information processors and to perform as backup servers for failed servers. A standby configuration designates a server to be an idle or passive backup for a failed server in the cluster.

    PowerHA can be tailored to specify which server in the cluster will take over the application of the failed server and to specify which application has priority on the takeover server. PowerHA recovery processes also allow you to specify which server the application should be assigned to, or reassigned to, after recovery, resynchronization, and reintegration of the failed server into the cluster. This provides greater flexibility for maintaining availability.

  • Workload distribution: A PowerHA mutual takeover configuration, applications, and their workloads are assigned to specific servers. For example, in a two-node PowerHA cluster, one server may be designated to be the application server and the second server may be designated to be a database server. Segmenting the application processing to one server and the database processing to the second server utilizes both servers in a productive manner and maximizes application throughput and investments in hardware and software.
  • Workload balancing: In addition to providing high availability, PowerHA V5.5 can also be configured to provide loosely coupled multiprocessing services. These configurations allow workload to be spread across multiple Power Systems, sharing the disk and processor resources of the clustered nodes. This clustered approach, along with the capability of application failover and recovery/restart of the PowerHA configured machine, offers additional levels of high availability processing for customer-critical environments.
  • Scalable growth: PowerHA software is scalable to address a broad range of business- critical, high availability application needs. With PowerHA, two to 32 servers may be configured for high availability. PowerHA offers built-in growth and helps protect investments in cluster hardware, software, services, and training.
  • System management: PowerHA provides a rich set of leadership system management tools to reduce cluster configuration and administration time. These tools include:
    • Cluster Single Point-of-Control (C-SPOC)
    • AIX System Management Interface Tool (SMIT)
    • A command-line interface
    • Two-Node Configuration Assistant
    • Cluster Test Tool
    • Cluster Definition File: Enhanced manageability for clustered systems is available through a Simple Network Management Protocol (SNMP) client or through Tivoli® NetView® for AIX.

      Administration of single and multiple clusters is enhanced through Cluster Snapshots, PowerHA File Collections, and Event Summaries. These tools allow system managers and application developers to easily configure, replicate, test, and manage IBM System high availability clusters.

  • Easy upgrade/migration: Nondisruptive hardware and software upgrades can be performed with PowerHA. The cluster configuration can be expanded or modified without service disruption through Dynamic Reconfiguration options. Version compatibility and Dynamic Reconfiguration can eliminate the most common causes of scheduled cluster downtime.
  • Concurrent processing: Concurrent processing is possible when using Oracle Parallel Server (OPS), Oracle RAC, or Oracle Database 10g. The combination of PowerHA and Oracle offers an additional level of high availability. With PowerHA and Oracle, all servers in the cluster share the data and system resources; if one or more servers should fail, the remaining servers continue processing with minimal disruption, if any, because no failover is required. A possible benefit of PowerHA and Oracle is a performance improvement because all database processing is done in a parallel manner.
  • Breadth of hardware support: High availability is provided across the Power Systems and System p and System i server lines, extending from entry-level deskside servers to the largest enterprise-class servers. Supported disk subsystems include:
    • SCSI
    • RAID
    • Fibre Channel-attached disk subsystems
    • Serial Storage Architecture, scalable to terabytes of data storage
    • ESS

      PowerHA also gives you the ability to "mix and match" processor and disk subsystem technologies to meet processing needs. Power Systems, System p servers and symmetric multiprocessors, System i servers, LPARs on applicable servers, and SPtm nodes can have membership in the same PowerHA cluster.

  • Extensive networking support: Extensive configuration flexibility supports a variety of networks, including:
    • Ethernet
    • EtherChannel
    • FDDI
    • Token ring
    • ATM
    • ATM LAN Emulation
    • X.25
    • TMSCSI
    • TMSSA
    • RS232
  • Comprehensive heartbeat capability: TCP/IP, serial, SSA, SCSI, disk, and IP alias heartbeat transmission paths are available. Multiple heartbeat paths let you reliably differentiate network, node, and adapter failures to eliminate potential false takeovers and their impacts.
  • Extensive data backup and recovery options.
Overview of IBMHigh Availability and Data Backup/Recovery Options
            Dispersion AIX base         Storage      Distance      
 Offering   need       technology                    consideration 
 PowerHA    Data Ctr   LVM Mirroring    Agnostic     Up to 15KM    
            Campus     LVM split-site   SAN          Up to 40KM    
 PowerHA/XD Campus     GLVM             Agnostic     Up to 40KM    
                       Replication over                            
            Remote     GLVM             Agnostic     Unlimited     
                       Replication over                            
            Campus     LVM              SAN Based    Up to 300KM   
                                        Metro Mirror               
                                        over FC                    
            Remote     LVM              SAN Based    Unlimited     
                                        over FC              

PowerHA and RAS

Reliability, availability, and serviceability (RAS) are implemented on all enterprise-class System p, System i, and Cluster 1600 servers:

  • Error detection
  • Fault tolerance
  • Reliable hardware components
  • High availability
  • Fault-management software
  • Concurrent or online diagnostics

PowerHA complements these technologies with additional high availability management for your applications and for continuous operation during planned maintenance.

Previous release

Existing customers of HACMP V4 (5765-E54) or V5 (5765-F62) can obtain HACMP V5.5 via the existing 566x-HMP Software Maintenance product offerings and the AIX SPO (5692-A5L or 5692-A6P).

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Offering Information
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Product information is available via the Offering Information Web site

Business Partner information

If you are a Direct Reseller - System Reseller acquiring products from IBM, you may link directly to Business Partner information for this announcement. A PartnerWorld® ID and password are required (use IBM ID).

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No publications are shipped with this program.

License Information will display automatically when (HACMP) V5 is installed.

The following publications are supplied on CD-ROM with the basic machine-readable material.

Title                                             Number
HACMP for AIX: Concepts and
Facilities Guide                                  SC23-4864
HACMP for AIX: Planning Guide                     SC23-4861
HACMP for AIX: Installation Guide                 SC23-5209
HACMP for AIX: Administration Guide               SC23-4862
HACMP for AIX: Troubleshooting Guide              SC23-5177
HACMP for AIX: Programming Client
Applications                                      SC23-4865
HACMP for AIX: Master Glossary                    SC23-4867
For HACMP/XD GLVM customers:
HACMP/XD GLVM Planning and Administration
Guide                                             SA23-1338
For HACMP/XD Metro Mirror customers:
HACMP/XD: Metro Mirror Planning and
Administration Guide                               SC23-4863
For HACMP Smart Assist customers:
HACMP for AIX: Smart Assist for WebSphere
User's Guide                                      SC23-4877
HACMP for AIX: Smart Assist for Oracle            SC23-5178
HACMP for AIX: Smart Assist for DB2               SC23-5179
HACMP for AIX: Smart Assist Developer's Guide     SC23-5210

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Technical information
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Specified operating environment

Hardware requirements

PowerHA V5 works with IBM Power System servers in a "no-single-point-of-failure" server configuration running an AIX operating system image. PowerHA V5 supports the Power System models that are designed for server applications and which meet the minimum requirements for internal memory, internal disk, and I/O slots. The program's hardware specifications information may be found in documentation accompanying the program or other information published by IBM, such as the program's Sales Manual.

Software requirements

PowerHA supports the AIX V5.3 and AIX V6.1 operating system. The PowerHA program's specifications and specified operating environment information may be found in documentation accompanying the program, if available, such as a readme file, or other information published by IBM, such as an announcement letter. Documentation and other program content may be supplied only in the English language.

The following is required for PowerHA/XD GLVM Asynchronous support:

  • AIX V6.1 with Technology Level 2 Service Pack 1 and APAR IZ31208
  • PowerHA V5.5 with APAR IZ31205 and IZ31207

PowerHA V5.5 supports dynamic upgrade from HACMP V5.3 and V5.4, and static upgrades from HACMP V5.1 and forward.

  • A dynamic upgrade from HACMP V5.3 and V5.4 involves installing PowerHA V5.5 on all nodes in the cluster; however, the Version Compatibility function allows you to upgrade the cluster one node at a time, without taking the entire cluster offline. Configuration data is retained.
  • A static upgrade to PowerHA V5.5 involves reinstalling PowerHA on all nodes in the cluster at the same time. This means that at some point, the cluster must be brought down; however, with proper planning the downtime can be minimized.

Note: Although different releases of PowerHA V5 can coexist in a cluster temporarily, the PowerHA Compatibility function is intended to ease migration from prior releases of PowerHA V5 and is not intended to provide long-term compatibility between versions of the product in a cluster.


PowerHA provides high availability for the applications and resources executing on the nodes in the PowerHA cluster. PowerHA does not provide availability beyond the realm of the defined cluster configuration. A high availability implementation requires that there be no single points-of- failure (for example, primary and backup PowerHAs in LPAR partitions within a single server frame).

Specific limitations of PowerHA

  • PowerHA supports clusters of up to 64 resource groups and 256 interfaces across up to 32 AIX PowerHA images (Power Systems, System p or System i servers, or LPARs).
  • The following networks are not supported:
    • Serial Optical Channel Converter
    • SLIP
    • Fibre Channel Switch
    • 802_ether
    • Virtual IP Address facility of AIX
    • IPv6
  • PowerHA Support for CUoD, CBU, and DLPAR:

    PowerHA can be run in LPARs to which processors or memory are added through CUoD or DLPAR (refer to Hardware Announcement 102-260, dated October 08, 2002) or CBU (refer to Hardware Announcement 103-286, dated October 14, 2003). Care must be taken to ensure that sufficient capacity and appropriate procedures are in place to support these features. CuOD support for POWER5 and POWER6 servers is limited to the features that are in common with POWER4tm. Advanced feature available for POWER6, like Micro-Partitioningtm, are not supported.

    Adjusting the hardware configuration (adding or removing processors or memory) of a PowerHA node will, under many circumstances, put a significant additional temporary load on that system. This can cause PowerHA to interpret that system as having failed. PowerHA does not currently have a supported mechanism that will automatically deal with this in all cases. Customers who want to take advantage of these features should run tests and perform adequate benchmarking of their environments to determine the timing implications under varying workload conditions. IBM is not responsible for failures due to incorrect settings of these values, as these tuning parameters are unique for every customer environment.

  • When installing PowerHA on a system with Trusted Computing Base (TCB) security in place, special considerations are required. PowerHA will modify some system files that are monitored by TCB. This will cause errors to be reported by TCB. The error messages may not identify PowerHA as the origin of the changes to the monitored files. While this does will not affect the operation of PowerHA, TCB, or of the AIX system, customers should verify that the messages are indeed caused only by the installation of PowerHA. If that verification is successful, then no further action is required (the tcbck command should not be used to undo the PowerHA changes). Otherwise, normal security procedures should be followed.
  • The Fast Failure Detection function is supported on all supported disk types except SSA.
  • PowerHA updates SNMP during installation.

Specific limitations of PowerHA/XD

  • Concurrent disk access within PowerHA/XD GLVM is supported only within sites, not between sites.
  • A single PowerHA/XD cluster supports only two sites. A single node can be part of only one PowerHA/XD cluster site.
  • A single PowerHA/XD cluster supports up to eight nodes.

    Note: PPRC eRCMF support is no longer included with the XD feature.

Specific limitations of PowerHA Smart Assist

  • Smart Assist for DB2 cannot be used to configure a cluster in a partitioned (DB2 UDB DPF) environment.
  • When protecting WebSphere Application Servers, only environments using Network Deployment (that is, using Deployment Manager) will be configured into PowerHA by the WebSphere Smart Assist.
  • The default configuration created for the WebSphere components assumes an unloaded standby system is available, with enough resources to assume the workload of the active system.
  • A single standby system may be configured to protect multiple workloads, but is assumed to only effectively execute one workload at a time. The default configuration can be subsequently modified to meet installation-specific requirements.
  • For WebSphere configurations using an IBM HTTP Server (IHS) with application servers, Smart Assist will automatically configure the IHS to failover with the application server. This will require the administrator to place the IHS data on a shareable volume group accessible by both nodes.
  • Because of the common Smart Assist infrastructure added in HACMP V5.4, there is no migration path from the HACMP V5.3 Oracle Smart Assist to the PowerHA V5.5 Oracle Smart Assist. The PowerHA resource groups and resources constructed with the Version 5.3 Oracle Smart Assist are migrated, but you cannot use the PowerHA V5.5 Oracle Smart Assist facilities to manage Oracle Smart Assist instances originally created on HACMP V5.3.

Environmental conditions that affect the use of PowerHA

  • The time PowerHA takes to recover from a failure depends, in part, on the amount of time it takes for AIX to detect the failure. With the default network detections setting, some token-ring failures may require more than 60 seconds to be detected.
  • PowerHA does not support attached terminals using Local Area Transport-B protocols.
  • Cluster nodes must be within the cable-length limitations of the shared disks, so the physical distance between nodes is limited by the total cable length of the shared disk cables.
  • Transparency of a failure and the subsequent recovery to external users or clients is dependent on the PowerHA configuration, the client system, and application protocol design.
  • The AIX Journaled File System (JFS and JFS2) does not support concurrent access from multiple nodes; therefore, storage accessed in a concurrent configuration must be in raw logical volumes or through GPFS.
  • For systems running NetView or other programs that catch SNMP traps, refer to PowerHA documentation for details on the use of the CLINFO daemon with such programs.
  • National Language Support is fully enabled in PowerHA for AIX; message translation is provided for Japanese, but other system components such as RSCT produce messages in English only.

For additional information, refer to Usage restriction in the Terms and conditions section of this announcement, or to the License Information document that is available on the IBM Software License Agreement Web site
Performance considerations

PowerHA 5.5 cluster performance can be measured and reported in many ways. In a mutual takeover/partitioned workload cluster environment, the user's applications and data are spread across two to 32 nodes in a cluster. Data management and application management can be placed under the control of a single node for efficiency or on each node for performance. In this partitioned environment, minimal interaction between nodes in a cluster derives high efficiency in each node. When a failover occurs and the backup node takes over for a failed node, performance is degraded for that period of time when the node is down.

In data sharing, LAN and file system overhead and data contention can reduce processor efficiency. Where data must be shared, the concurrent access configuration can be utilized, but less efficiently than a single system because distributed locks must be maintained between cluster nodes and processors.

Planning information

Solution Provider's responsibilities: Responsibilities assigned to the customer in the Customer responsibilities section will be assumed by the Solution Providers for their end users, where appropriate.

Customer responsibilities

Customers who purchase two or more PowerHA licenses may replicate the contents of the following file sets throughout their enterprise:

  • cluster.hativoli

PowerHA V5.5 includes conversion utilities to help you convert your configuration from earlier releases of HACMP without installing each intervening version.

All of these conversions can be done while your cluster is not operating; for information regarding node conversion while maintaining cluster operation, refer to the Compatibility section.

The following conversions are provided for converting existing configurations of HACMP V5 to PowerHA V5.5:

  • HACMP for AIX V5.1
  • HACMP for AIX V5.2
  • HACMP for AIX V5.3
  • HACMP for AIX V5.4.0
  • HACMP for AIX V5.4.1

PowerHA 5.5 includes conversion utilities to help you migrate your configuration between products in the HACMP family.

Direct customer support

For technical support or assistance, contact your IBM representative or visit

This program is shipped on CD-ROM; media and publications are shipped under the 5692-A5L and 5692-A6P SPO.

  • Proof of Entitlement (PoE) information to support this licensed program is provided in the License Information document, which will be displayed automatically when PowerHA V5 is installed.
  • Unlicensed documentation is included.

Security, auditability, and control

The announced program uses the security and auditability features of the AIX operating system. The customer is responsible for evaluation, selection, and implementation of security features, administrative procedures, and appropriate controls in application systems and communication facilities.

Software Services

IBM Software Services has the breadth, depth, and reach to manage your services needs. You can leverage the deep technical skills of our lab-based Software Services team and the business consulting, project management, and infrastructure expertise of our IBM Global Services team. Also, we extend our IBM Software Services reach through IBM Business Partners to provide an extensive portfolio of capabilities. Together, we provide the global reach, intellectual capital, industry insight, and technology leadership to support a wide range of critical business needs.

To learn more about IBM Software Services or to contact a Software Services sales specialist, visit

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Charge metric

The following applies to PowerHA:

                 Part number
Program name     or PID number    Charge metric
PowerHA           5765-F62        Per processor, per small,
  for AIX                          medium, or large server
PowerHA/XD        5765-F62        Per processor, per small,
  for AIX                          medium, or large server
  Assist for      5765-F62        Per processor, per small,
  AIX                              medium, or large server
1-year SWMA:      5660-HMP        Per processor, per small,
 Registration                      medium, or large server
 and Renewal
1-year SWMA:      5661-HMP        Per processor, per small,
 After-license                     medium, or large server
3-year SWMA:      5662-HMP        Per processor, per small,
 Registration                      medium, or large server
3-year SWMA:      5663-HMP        Per processor, per small,
 Renewal                           medium, or large server
3-year SWMA:      5664-HMP        Per processor, per small,
 After-license                     medium, or large server
Electronic Software Delivery

Electronic delivery is now available for select licensed programs upgrades, including PowerHA for AIX, V5. Customers with a current Software Maintenance Agreement can download software upgrades online without having to wait for an order to be processed or physical media to arrive. Electronic delivery is available only for upgrades or product refreshes. For details on Electronic Software Delivery registration, refer to Software Announcement 206-174, dated July 25, 2006.

System Program Order (SPO)

An order for SPO 5692-A5L or 5692-A6P is mandatory for shipments of program distribution. The individual licensed program orders are for registration and billing purposes only. No shipment occurs under these orders.

Specify feature number 3410.

Machine-readable materials are available only on CD-ROM. To receive shipment of machine-readable materials, the order needs to include SPO 5692-A5L (AIX 5) or 5692-A6P (AIX 6). The individual licensed program order (for example, 5765-F62) must still be ordered but will be for registration and billing purposes only and will not result in shipment of materials.

New PowerHA V5.5 SPO feature numbers
Program                                           Feature
number      Program/Function name                 numbers **
5692-A5L    PowerHA for AIX, V5.5 (Base)          2215
5692-A5L    PowerHA/XD for AIX, V5.5              2216
5692-A5L    PowerHA Smart Assist for AIX, V5.5    2217
5692-A6P    PowerHA for AIX, V5.5 (Base)          2215
5692-A6P    PowerHA/XD for AIX, V5.5              2216
5692-A6P    PowerHA Smart Assist for AIX, V5.5    2217

** 2215, 2216, and 2217 are new features. All other features were previously announced (refer to Software Announcement 206-176, dated July 25, 2006), but are repeated here for convenience.

HACMP V5.4 SPO feature numbers

HACMP V5.4 will remain available via current 5765-F62 billing feature numbers and AIX V5 SPO (5692-A5L) supply feature numbers below:

Program                                           Feature
number      Program/Function name                 numbers
5692-A5L    IBM High Availability Cluster         1489
            Multi-Processing for AIX, V5.4
5692-A5L    IBM High Availability Cluster         1490
            Multi-Processing for AIX, V5.4
            XD Extended Distance Feature
5692-A5L    IBM High Availability Cluster         1491
            Multi-Processing for AIX,
            V5.4 Smart Assist Feature

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The information provided in this announcement letter is for reference and convenience purposes only. The terms and conditions that govern any transaction with IBM are contained in the applicable contract documents such as the IBM International Program License Agreement, IBM International Passport Advantage® Agreement, and IBM Agreement for Acquisition of Software Maintenance.


IBM International Program License Agreement including the License Information document and Proof of Entitlement (PoE) govern your use of the program. PoEs are required for all authorized use.

This software license includes Software Subscription and Support (also referred to as Software Maintenance).

Agreement for Acquisition of Software Maintenance

The IBM Agreement for Acquisition of Software Maintenance (Z125-6011) agreement applies for subscription and support (also referred to as Software Maintenance) and does not require customer signatures.

These programs are licensed under the IBM Program License Agreement (IPLA) and the associated Agreement for Acquisition of Software Maintenance, which provide for support with ongoing access to releases and versions of the program. IBM includes one year of Software Subscription and Support (also referred to as Software Maintenance) with the initial license acquisition of each program acquired. The initial period of Software Subscription and Support (also referred to as Software Maintenance) can be extended by the purchase of a renewal option, if available. These programs have a one-time license charge for use of the program and an annual renewable charge for the enhanced support that includes telephone assistance (voice support for defects during normal business hours), as well as access to updates, releases, and versions of the program as long as support is in effect.

License Information form number

The program's License Information will be available for review on the IBM Software License Agreement Web site
Limited warranty applies


Money-back guarantee

If for any reason you are dissatisfied with the program and you are the original licensee, you may obtain a refund of the amount you paid for it, if within 30 days of your invoice date you return the program and its PoE to the party from whom you obtained it. If you downloaded the program, you may contact the party from whom you acquired it for instructions on how to obtain the refund.

Authorization for use on home/portable computer

You may not copy and use this program on another computer without paying additional license fees.

Volume orders (IVO)

Yes. Contact your IBM representative.

Passport Advantage applies


Usage restriction


For additional information, refer to the License Information document that is available on the IBM Software License Agreement Web site
Software Subscription and Support (Software Maintenance) applies

Yes. All distributed software licenses include Software Subscription and Support (also referred to as Software Maintenance) for a period of 12 months from the date of acquisition, providing a streamlined way to acquire IBM software and assure technical support coverage for all licenses. Extending coverage for a total of three years from date of acquisition may be elected.

While your Software Subscription and Support (Software Maintenance) is in effect, IBM provides you assistance for your routine, short duration installation and usage (how-to) questions, and code-related questions. IBM provides assistance via telephone and, if available, electronic access, only to your information systems (IS) technical support personnel during the normal business hours (published prime shift hours) of your IBM support center. (This assistance is not available to your end users.) IBM provides Severity 1 assistance 24 hours a day, every day of the year. For additional details, consult your IBM Software Support Handbook at

Software Subscription and Support (Software Maintenance) does not include assistance for the design and development of applications, your use of programs in other than their specified operating environment, or failures caused by products for which IBM is not responsible under this agreement.

For more information about the Passport Advantage Agreement, visit the Passport Advantage Web site at
System i Software Maintenance applies


Variable charges apply


Educational allowance available

Yes. A 15% education allowance applies to qualified education institution customers.

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Extended support attachments

For current prices, contact 1-888-Shop-IBM or your local IBM representative.

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To order, contact the Americas Call Centers, your local IBM representative, or your IBM Business Partner.

Identify your local IBM representative or IBM Business Partner, call 800-IBM-4YOU (426-4968).

Phone:      800-IBM-CALL (426-2255)
Fax:        800-2IBM-FAX (242-6329)
Mail:       IBM Teleweb Customer Support
  ® Sales Execution Center, Americas North
            3500 Steeles Ave. East, Tower 3/4
            Markham, Ontario
            L3R 2Z1

Reference: YE001

The Americas Call Centers, our national direct marketing organization, can add your name to the mailing list for catalogs of IBM products.

Note: Shipments will begin after the planned availability date.

HACMP, POWER5, POWER6, GPFS, DS8000, DS6000, DB2 Universal Database, SP, POWER4 and Micro-Partitioning are trademarks of IBM Corporation in the United States, other countries, or both.

IBM, System p, System i, AIX, TotalStorage, DB2, WebSphere, Tivoli, NetView, PartnerWorld, Passport Advantage and are registered trademarks of IBM Corporation in the United States, other countries, or both.

Other company, product, and service names may be trademarks or service marks of others.

Terms of use

IBM products and services which are announced and available in your country can be ordered under the applicable standard agreements, terms, conditions, and prices in effect at the time. IBM reserves the right to modify or withdraw this announcement at any time without notice. This announcement is provided for your information only. Additional terms of use are located at:

For the most current information regarding IBM products, consult your IBM representative or reseller, or visit the IBM worldwide contacts page


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