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An application server cluster has of a number of application servers loosely coupled on a network. The server group or server cluster is usually distributed over a number of nodes or machines. The important point to note is that the cluster seems as a single server to its clients.
The goals of application server clustering are:
1. Scalability: could be able to add new servers on the required node or add new additional nodes to enable the server to handle increasing loads without performance loss, and in a manner transparent to the last users.
2. Load balancing: Each server in the cluster could process a fair share of client load, in proportion to its processing power, to remove overloading of some and under utilization of other server sources. Load distribution could remain balanced even as load modifies with time.
3. High availability: Clients could be able to accept the server at almost all times. Server usage could be transparent to software and hardware failures. If a server or node fails, its workload should be changed over to other servers, automatically as fast as required and the application should continue to run uninterrupted. This method gives a fair degree of application system fault-tolerance. After failure, the entire load could be redistributed equally among active servers of the system.
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class Writer extends Client { // additional members private boolean technical = false; private boolean government = false; private boolean international = false; pri
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Where the local varible declared? Declaring variables within a function, makes them local .They are available only within that function and hold no meaning outside of it
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require assistance in Java / Grails support We have a project which requires continuous maintenance / support and occasional feature development. Its running on Java 1.7 / Grail
JMS consumer is a JMS client that receives messages.
What is output of the following JavaScript code? Str="Virtual University of Pakistan"; document.write(str.substring(5,str.length)) ;
Implement a program that can compute your taxes (assume year 2012, as- sume a form 1040EZ). The form should ask for your ling status (single, married), income, deductions and cred
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