Using groups to manage nodes on TSP-Link network
The primary purpose of groups is to allow each group to run a different test script simultaneously.
A group can consist of one or more nodes. You must assign group numbers to each node using
remote commands. If you do not assign a node to a group, it defaults to group 0, which is always
grouped with the master node (regardless of the group to which the master node is assigned).
Master node overview
You can assign the master node to any group. You can also include other nodes in the group that
includes the master. Note that any nodes that are set to group 0 are automatically included in the
group that contains the master node, regardless of the group that is assigned to the master node.
The master node is always the node that coordinates activity on the TSP-Link network.
The master node:
• Is the only node that can use the execute() command on a remote node
• Cannot initiate remote operations on any node in a remote group if any node in that remote group
is performing an overlapped operation (a command that continues to operate after the command
that initiated it has finished running)
• Can execute the waitcomplete() command to wait for the group to which the master node
belongs; to wait for another group; or to wait for all nodes on the TSP-Link network to complete
overlapped operations (overlapped commands allow the execution of subsequent commands
while device operations of the overlapped command are still in progress)
Group leader overview
Each group has a dynamic group leader. The last node in a group that performs any operation
initiated by the master node is the group leader.
The group leader:
• Performs operations initiated by the master node
• Initiates remote operations on any node with the same group number
• Cannot initiate remote operations on any node with a different group number
• Can use the waitcomplete() command without a parameter to wait for all overlapped
operations running on nodes in the same group
Assigning groups
Group numbers can range from zero (0) to 64. The default group number is 0. You can change the
group number at any time. You can also add or remove a node to or from a group at any time.
Each time the power for a node is turned off, the group number for that node changes to 0.
The following example code dynamically assigns a node to a group:
-- Assign node 3 to group 1.
node[3].tsplink.group = 1
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