Solaris OS Feature Restrictions

Consider the following points when you plan the use of the Solaris OS in a Sun Cluster configuration:

• Solaris 10 Zones – Install Sun Cluster framework software only in the global zone.

  To determine whether you can install a Sun Cluster data service directly in a non-global zone, see the documentation for that data service.

  If you configure non-global zones on a global-cluster node, the loopback file system (LOFS) must be enabled. See the information for LOFS for additional considerations.

• Loopback file system (LOFS) – During cluster creation with the Solaris 9 version of Sun Cluster software , LOFS capability is disabled by default. During cluster creation with the Solaris 10 version of Sun Cluster software, LOFS capability is not disabled by default.

  If the cluster meets both of the following conditions, you must disable LOFS to avoid switchover problems or other failures:

  • Sun Cluster HA for NFS is configured on a highly available local file system.

  • The automountd daemon is running.

  If the cluster meets only one of these conditions, you can safely enable LOFS.

  If you require both LOFS and the automountd daemon to be enabled, exclude from the automounter map all files that are part of the highly available local file system that is exported by Sun Cluster HA for NFS.

• Power-saving shutdown – Automatic power-saving shutdown is not supported in Sun Cluster configurations and should not be enabled. See the pmconfig(1M) and power.conf(4) man pages for more information.

• IP Filter – Sun Cluster software does not support the Solaris IP Filter feature for scalable services, but does support Solaris IP Filter for failover services.

• fssnap – Sun Cluster software does not support the fssnap command, which is a feature of UFS. However, you can use the fssnap command on local systems that are not controlled by Sun Cluster software. The following restrictions apply to fssnap support:

  • The fssnap command is supported on local files systems that are not managed by Sun Cluster software.

  • The fssnap command is not supported on cluster file systems.

  • The fssnap command is not supported on local file systems under the control of HAStoragePlus.