tank resetcluster

Erases the static cluster definition contained on the system master volume, without reinitializing the metadata, which in affect drops all metadata servers from the cluster at one time.

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>>-tank--resetcluster------------------------------------------><

Prerequisites

This task must be performed only by trained service technicians.

The cluster must be stopped.

Description

Note: This command is run from the shell prompt. It is not run inside of sfscli.
Attention: This command will wipe out the static cluster definition contained on the master volume. It is equivalent to issuing the dropserver command on all engines.

This command is used in extreme disaster recovery situations or when you attach new hardware to an existing cluster.

This command is located in the /usr/tank/server/bin directory.

This command must be run from an engine that has a Tank.Bootstrap file. If the engine does not have a Tank.Bootstrap file, this file can be recovered from the master volume using the tank extractbootrecord command. If the master volume is unknown, you can issue the tank lsdisklabel command to inspect the SAN File System product label and to locate the master volume.

After you run this command, the first metadata server that is started with a valid Tank.Bootstrap file becomes the new master metadata server. At this point, the cluster is a single-engine cluster, and all additional metadata servers must be added using the addserver command. In addition, it might be necessary to move filesets to these new engines (using the setfilesetserver command) if the added engines have different names than the original cluster's engine names.

Example

Reset the cluster The following example erases the static cluster definition on the master volume:
#/usr/tank/server/bin/tank resetcluster
Static cluster definition has been reset. cluster size = 0

Parent topic: Service commands and utilities

Related tasks
Restoring SAN File System cluster configuration
Changing an IP address in a single-engine cluster

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