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Interview question-howto do you improve scalability of the application in this case

chaitu chaitu
Last Modified: 2010-05-18
one webapplication is there.In that application some users are doing voting(Y/N) on all the products;lets think user can do voting multiple times .

Let assume some 10000 users are doing voting on this application at the samer time.while inserting data in the table can we do any bulk inserts kind of thing ?the interview is mainly focussing on scalability of the application.how to do you improve scalability of the application?i said i will implement connection pooling concept or else executeBatch statements.but he is telling that how to use bulk inserts concept?

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Top Expert 2016

Bulk inserts and batching is really the same thing, and *would* improve performance and scalability:

Java Developer
Top Expert 2010
This one is on us!
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you are talking about thread safe;do you mean that if i implement servlets in my application do i need to implement SingleThreadModel interface for all servlets?

"Servlet is loaded into the memory by Servlet Engine and it calls init() method on first request and then onwards only service() method is called for every other request by creating a separate thread for each request and finally destroy() method is called when the Servlet is removed by the Servlet Engine. Service() method can be replaced by doGet() or doPost() method.

Note that this architecture is a multi threaded model which is generally followed in most of the applications."

genearlly we follow above approach.Is it correct approach?
Top Expert 2016

There doesn't seem to be any more need for concern on the issue of thread safety than in any other web app that performs a db insert (i.e. the vast majority of them)

If you tell us more about how this voting occurs it might be possible to be more specific on improvements
Mick BarryJava Developer
Top Expert 2010

Yes thats a good approach, and you need to ensure your code is thread safe.
you want to also look at thread pool config for improving performance.

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