ns2 project in Arizona

ns2 project in Arizona

       ns2 project in Arizona our middleware infrastructure ns2 project in Arizona utilizes software agents to provide flexible and expandable middleware services for

high-performance Java environments. The main functions

of the agents are to deploy, schedule, and support the

execution of the parallel/distributed Java code, in addition

to managing, controlling, monitoring, and ns2 project in Arizona scheduling the

available resources on a single cluster or on a collection of

heterogeneous systems. When a parallel Java application is

submitted, an agent performs the following tasks: 1. Examine available resources and schedule the job for

execution, while balancing the load. 2. Convert ns2 project in Arizona scheduled user classes into threads, then

remotely upload and execute them directly from the

main memories on the remote machines. 3. Monitor and ns2 project in Arizona control resources and provide monitoring

and control functions to the user. For high throughput, the agents are multithreaded,

where each thread serves a client’s request. Once user ns2 project in Arizona threads are deployed, they directly communicate with one

another to perform parallel tasks, thus freeing the agents and reducing the overhead on the user programs. Agents’

communication mechanisms are implemented using sockets

and each agent consists of a number of components

whose main functions are described below, although many

of these functions can be independently ns2 project in Arizona enhanced to

provide different levels of services.



The Request Manager handles user job requests

such as deploying classes, starting/stopping a job,

and checking agents/threads status. Requests come

as request objects from client services or from

other agents. 2. The Resource ns2 project in Arizona Manager provides methods to manage,

schedule, and maintain the resources of the

machine where the agent resides. It keeps records of

executing threads, machine and communication

resources’ utilization, and performance information.

In addition, it is responsible for ns2 project in Arizona reclaiming system

resources after each job’s completion or termination. 3. The Security Manager provides security measures

for the system (see Section 4.3 for details). 4. The Class Loader remotely loads user classes in

parallel onto the JVMs on the remote machines in

preparation for execution. 5. The Scheduler selects the machines to execute a user

job based on the requested number of processors.

One mechanism to generate a schedule is ns2 project in Arizona to execute

a test program to select the fastest responding

machines. This method provides a simple but basic

load balancing among the processors. However,

since this is an independent ns2 project in Arizona component, the scheduler

can be easily replaced by any suitable

scheduler to satisfy different policies and performance

requirements. The client servicesand environment APIs providecommands

for users to interact with the environment. Requests are

accepted from the user and passed to the agent after

encapsulation as an object with the ns2 project in Arizona necessary information.

The following commands are available for the user through

client services and for the other programming models and applications as APIs such as pjava to initiate a parallel job,

pingAgent to list available agent(s) and their status, listThreads

to list active threads, and killJob to terminate a job