ns2 project in Alabama
ns2 project in Alabama the protocols introduced are based on the following
general assumptions: 1. Nodes within a cluster are fully connected (e.g.,
nodes under leader 2, 3, or 4), including nodes
belonging to different subtrees (e.g., all nodes under
leader 3 are fully connected). 2. In some cases, nodes from different ns2 project in Alabama clusters (or
machines) may not see each other directly (e.g., nodes
under leader 2 cannot see nodes under leader 3). 3. All machines in the system must be fully connected
in the sense that at least one node from each ns2 project in Alabama machine
can see at least one node from each of the other
machines. Before getting into the details of the ns2 project in Alabama structure and
required mechanisms, we define some basic terms that will
be used throughout this section. Virtual cluster: A collection of nodes within one
large cluster that form one group of agents and ns2 project in Alabama their
leader (a subtree). A large cluster is divided into
multiple virtual clusters to make communications
and management more efficient (e.g., the agents led
by leader 4 in . 2. Head node: In some cases, a cluster has a ns2 project in Alabama single node
that is connected to other machines or clusters. This
node is called the head node and has a leader agent
residing on it. 3. Local node: From the viewpoint of an agent/leader,
the node where it resides is its local node. 4. Remote node: From the viewpoint of an agent/
leader, nodes other than its local node are remote
nodes The protocols introduced here require a number of standard
control messages that the agents use to communicate and
exchange information. These messages, referred to ns2 project in Alabama as the
middleware control messages (MCM), are defined here. Leader Advertisement Message (LAM): A broadcast
message sent by a newly created leader to inform
other existing leaders of its birth. LAM contains the
leader’s ID (a unique identifier acquired at startup) and its address ns2 project in Alabama information. 2. Agent Monitor (AM): Periodic messages sent by leaders to one another and to descendant agents to
check if they still exist. 3. Leader Advertisement Acknowledgment Message (LAAM): Sent by a leader upon receiving a LAM or AM from another leader. LAAM contains respondent’s ID and address ns2 project in Alabama information. 4. Agent Activation Message (AAM): Sent by a leader to activate descendant agents. It contains the leader’s ID and address information, in addition to an activation command. 5. Agent Monitor Acknowledgement (AMA): Sent by an agent in response to an AM or AAM. It contains the sender’s ID, address, and resources information.
6. Leader Not Responding Message (LNRM): Sent by a leader that ns2 project in Alabama does not receive an LAAM from another leader in response to the AM message, to all leaders at the same level, and the leader’s parent if one exists. It contains the sender’s ID and the nonresponding
leader’s ID.
For the agents to operate efficiently, they need a ns2 project in Alabama startup
protocol to automatically identify and communicate with
one another. The initial stage requires manual installation of
the first leader agents on the head nodes. The ns2 project in Alabama leaders then
start the startup and automatic configuration phase.
1. Each leader is responsible for performing the
following tasks: a. Execute the startup protocol to automatically
acquire connectivity and operational information
in the system. b. Periodically perform availability checks of the
leaders and descendant agents. If a leader or
agent does not respond, activate leader recovery
or agent update protocols. c. Perform object routing for other agents to ensure
full connectivity with other clusters and machines
in the system. Many routing protocols
can be adapted for this system, but the discussion
of the routing details is beyond the scope of
this paper.