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The clustering regulates high scalability and availability. The basic considerations for servlet clustering are:
1. Objects opened in a session could be serializable to support in-memory replication of sessions. Also consider the problem of serializing very big objects. Test the performance to make sure it is running.
2. Design for idempotence. Failure of an impatient or a request users clicking again may result in duplicate requests being given. So the Servlets could be relay to tolerate duplicate requests.
3. Avoid using static and instance variables in write and read mode because different instances can exist on different JVMs or on different operating system. Any state could be held in an external instance such as a database.
4. Avoid sending values in a ServletContext. It is not serializable and also the different resources may exist in different JVMs.
5. Avoid using java.io.* because the files cannot exist on all backend machines #question..
Explain function system.arraycopy() ? Although copying an array isn't particularly hard, it is an operation that advantages from a native implementation. Thus java.lang.System
Want to Design an all encompassing Database for a small business Project Description: I want to organize and structure an all encompassing database and Information management
what is java
1. Obtaining the new script: Download and save the attached comment CGI mailer script form-mail2.pl to your server''s cgi-bin directory, and change the permissions on the script to
Problem 1 Explain and Define the following concepts with appropriate examples a) Superclass b) Subclass c) Inheritance d) Exceptions e) Stream classes >>Defining and expl
Explain different way of using thread? The thread could be executed by using runnable interface or by inheriting from the Thread class. The former is more advantageous, 'cau
how to retrieve multiple records randomly from a file and store it in another file
Explain primitive data types in java? Java's primitive data types are extremely similar to those of C. They involve boolean, byte, short, long, int, float, double, and char. Th
Specifically, you'll create a program that will hold minutes worked and assign a value. Calculate the value into hours and minutes. Display the result as shown in Figure 2. Reme
What is a local, member and a class variable? Variables declared within a method are "local" variables. Variables declared within the class i.e not within any methods are "m
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