unfencevsd Command

Purpose

unfencevsd – Gives applications running on a node or group of nodes access to a virtual shared disk or group of virtual shared disks that were previously fenced from applications running on those nodes.

Syntax

unfencevsd {-a | -v vsd_name_list} {-n node_list [-f] }

Description

Under some circumstances, the system may believe a node has become inoperable and may begin recovery procedures when the node is actually operational, but is cut off from communication with other nodes running the same application. In this case, the problem node must not be allowed to serve requests for the virtual shared disks it normally manages until recovery is complete and the other nodes running the application recognize the problem node as operational. The fencevsd command prevents the problem node from filling requests for its virtual shared disks. The unfencevsd command allows fenced nodes to regain access to the virtual shared disks.

You can issue this command from any node that is online in the peer domain.

Flags

-a
Specifies all virtual shared disks.
-f
Allows a fenced node to unfence itself.
-n node_list
Specifies one or more node numbers separated by commas.
-v vsd_name_list
Specifies one or more virtual shared disk names, separated by commas.

Parameters

None.

Security

You must have root authority to run this command.

Exit Status

0
Indicates the successful completion of the command.
nonzero
Indicates that an error occurred.

Restrictions

You must issue this command from a node that is online in the peer domain. To bring a peer domain online, use the startrpdomain command. To bring a particular node online in an existing peer domain, use the startrpnode command. For more information on creating and administering an RSCT peer domain, refer to the RSCT: Administration Guide.

Standard Output

Current RVSD subsystem run level.

Examples

  1. To unfence node 5 from the virtual shared disks vsd1 and vsd2, enter: 
    unfencevsd -v vsd1,vsd2 -n 5
  2. To unfence node 7 from the virtual shared disks vsd1 and vsd2 when the unfencevsd command must be entered from node 7, enter: 
    unfencevsd -v vsd1,vsd2 -n 7 -f

Location

/opt/rsct/vsd/bin/unfencevsd