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PRIMECLUSTER  Installation and Administration Guide4.3

19.1 Functional Overview

The PRIMECLUSTER Wizard for NAS is a software product that is for when using an ETERNUS NR1000F series (hereafter referred to as the "NR1000F") as a shared disk device for a PRIMECLUSTER-based cluster system.

Startup and stop control

This function follows the state transition for the userApplication and automatically controls the export/unexport of the NAS device's volume accordingly. Also, during standby operation, this function cancels the file lock that the old operating node was maintaining during startup.

Automatic control in the event of a failure

The PRIMECLUSTER Wizard for NAS does not perform error monitoring for the NAS device, but by means of other resources, error detection and switch control are possible.

  • PRIMECLUSTER GLS monitors the access path to the NAS device.

  • The RemotedFileSystem resource, which allows remote file system mounting control, monitors accesses to the volume.

Environment setup

The environment setup wizard for running a NAS device as a shared disk on PRIMECLUSTER allows you to configure a cluster environment based on a NAS device easily and safely.

Integrating NR1000F of cluster configuration
  • The product supports operation linked with a NR1000F cluster configuration that has made the controller redundant through the use of two NR1000F devices.

  • If, between the cluster configuration NR1000F and the nodes, data access cannot be preformed due to something such as a transmission path error, the PRIMECLUSTER Wizard for NAS detects the error and takes over control of the cluster configuration NR1000F. The cluster configuration NR1000F takes over control when there is a malfunction with the controllers between devices, but does not take over for transmission path errors to the NR1000F. Through the PRIMECLUSTER Wizard for NAS linking to the cluster configuration NR1000F, it is possible to continue work even when there is a transmission path error.