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Transition Impacts

Tru64 UNIX Software Transition Kit


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critical impact:

TruCluster Server commands - not available; similar functionality exists (CrUn383)

CLU Impacts CMD Impacts

Problem description

The Tru64 UNIX TruCluster Server commands are not available on HP-UX. However, alternative functionality may be available using Serviceguard on HP-UX 11i v2.

Applications, such as scripts, which have dependencies on TruCluster Server commands will need to be modified or rewritten to migrate to Serviceguard cluster functionality on HP-UX.


UNIX Commandsclu_add_member UNIX Commandsclu_create UNIX Commandsclu_get_info
UNIX Commandsclu_bdmgr UNIX Commandsclu_delete_member UNIX Commandsclu_quorum
UNIX Commandsclu_check_config UNIX Commandsclu_disk_install UNIX Commandsclu_upgrade

See also

Solution description

In many instances, alternative commands or functionality may be available using Serviceguard on HP-UX 11i v2.

The following are comparisons between several TruCluster Server and Serviceguard commands and functionality. Please refer to the Managing MC/ServiceGuard document for more information about using the Serviceguard cluster commands.

  • The Tru64 UNIX TruCluster Server clu_create command is used to create a cluster after system, storage, and network setup are configured.

    Serviceguard cluster creation is done after all of the nodes have been installed and configured, followed by creating a cluster configuration file using the cmquerycl command, and subsequent cluster creation by using the cmapplyconf command.

  • The Tru64 UNIX TruCluster Server clu_add_member and clu_delete_member commands are used to add and remove members to or from an existing cluster.

    The expansion of a Serviceguard cluster involves building the new system with all system software installed and configured, creating a new cluster configuration, and applying it. This will add the new host to the cluster and existing packages can then be added to the new cluster member.

  • The Tru64 UNIX TruCluster Server clu_get_info command is used to get information about a cluster and its members.

    The Serviceguard cmviewcl command is similar in functionality.

  • The Tru64 UNIX TruCluster Server clu_upgrade command is used to perform a rolling upgrade.

    Serviceguard rolling upgrades are performed by using the cmhaltnode command on a particular node, followed by a software upgrade to that node, and then followed by using the cmrunnode command to restart the cluster. This process is repeated for each node in the cluster.

  • The Tru64 UNIX TruCluster Server clu_quorum command is used to configure or delete a quorum disk. The quorum paradigm is different between TruCluster and Serviceguard. TruCluster Server follows a static quorum concept, based on the value of quorum votes, where a quorum size number of nodes is required to automatically start a cluster.

    Serviceguard uses a dynamic quorum concept where the required quorum is recalculated as nodes join or leave a cluster, allowing Serviceguard to automatically react to changing cluster sizes.

See also

Problem summary

classifications source types OS release severity type
CLU, CMD Make, Script any HP-UX 11i version critical unavailable
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