There are two special types of tuples automatically inserted into the tuple space by Agilla: 1) Agent Tuples and 2) Host Tuples. For each agent running on a node, Agilla inserts an Agent tuple containing the agent's ID. The tuple has two fields where the first is a string "aid" and the second is an AgentID. When the agent terminates or migrates off the host, Agilla automatically removes the agent tuple. This tuple is useful to determine which agents are residing on a particular host. The Host tuple is inserted to allow an agent to discover the location of neighboring nodes. It has two fields, the first being the string "hid" and the second being a location (the location of the host).
The group probing operations has not been implemented yet. Once it is, an agent can perform a group probe on the tuplespace to determine the locations of neighboring hosts and agents.