FIXPACK AND REFRESH PACK HOT DEPLOYMENT

       FIXPACK AND REFRESH PACK HOT DEPLOYMENT   



FIX PACK : It fixes certain issues

----->  If we got any problem we have to raise PMR(PROBLEM MANAGEMENT REPORT) to IBM. They will provide a fix to that problem.

----> Up to 6.1 version 43 FIX PACKS have been issued.




REFRESH PACK : A milestone for release it takes you to release say 6.0.0.1 (like a new release of software).

----> If you apply rp2 it becomes 6.0.0.2

----> If you apply rp35 becomes 6.0.2.35 which is not a release.




HOT DEPLOYMENT :



----> Adding modules or additional services to existing application or new application without stopping application server as well as application

----> It will not effect to Business Impact.

----> When application is went to production environment then we cannot stop the application as application requests will come so in that case we will go for that  HOT DEPLOYMENT.




SESSION MANAGEMENT :

Q)  what is the session management  in Version 6.1 and if we use cookies and ssl what are the advantages and disadvantages?

A) ---->  Http is stateless protocol , It will not maintain any session. 

     -----> To maintain a session in websites like shopping websites,we need a session management mechanism like cookies, URL rewriting , file persistence, JVM in-memory session management etc...

    -----> Considering performance , Maintaining session information in JVM is the best method of session management.

------> Considering security, Maintaining session on Database is the best method of session 

management.

-----> Cookie is a small unit of memory/program that is used to store data  for further client requests.

-----> An HTTP Session is  series of requests to servlet originating from same user at same browser.

-----> Sessions allow applications running in web Container to keep track of individual users.

-----> Many web applications allow users to dynamically collect data as move through site based on series of selection of pages they visit

-----> When user goes to next or what site displays next it will depend on what the user has choosen previously from that site.

-----> For this maintaining of data the application will stores it in Session.


CONTEXT ROOT :

----> Context Root of web application is stored in application.xml file

----> Every web application developed within websphere studio has a Context Root associated with it.

----> Context Root helps to distinguish multiple applications deployed on same application server.

----> By Context Root only your Configuration file (PLUGIN-CNF.XML) routes the request to the particular application