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Configuring application service groups

In Share Out mode, if the Volume Server and Volume Client nodes are configured in different clusters, the SAN volumes on Volume Clients depend on the SAN disk groups on the Volume Server. In order to maintain the start order to satisfy this dependency, you should use the RemoteGroup agent when you have two clusters.

If the Volume Server and Volume Client nodes are configured in one cluster, use service group dependencies when you have the Volume Server and the Volume Client systems in one cluster.

If the Volume Server and Volume Client nodes are configured in the same cluster, make the service group containing the SAN disk group the child service group and the service group containing the SAN volume the parent service group. The link between the two service groups should be an Online Global Firm type.

See the Veritas Cluster Server User's Guide and the Veritas Cluster Server Bundled Agents Reference Guide on information about configuring and using the RemoteGroup agent and about service group dependencies.

Resource dependencies for share out mode

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SANVolume resource in Share Out mode in the main.cf file

SANVolume svol (

    SANDiskGroup = sample_cvol_dg

    SANVolume = sample_cvol

    VolumeServer = "vol_server.example.com"

    )

DiskGroup Resource in Share Out mode in the main.cf file

DiskGroup only_sandg_vNFS_DiskGroup (

    DiskGroup = sample_cvol_dg

    MonitorReservation = 1

    DiskGroupType = SAN

    )

In Volume Serving mode, the SAN volume is the lowest resource in the application dependency graph for shared storage.

Resource dependencies for volume serving mode

SANVolume resource in Volume Serving mode in the main.cf file

SANVolume vNFS_SANVolume (

    Domain = testdom1

    SANDiskGroup = sample_cvol_dg

    SANVolume = sample_cvol

    VolumeServer = "vol_server.example.com"

    )