General Discussion

Session management in highly scalable web sites

Todd Hoff

Sep 18, 2007 — 1 min read

Hi,

Every application server has its own session management implementations for supporting high scalability. But an application architect/developer has to design and implement the application to make the best use of it.

What are the guiding principles and pattern for session state management?

Websphere System management red book mentions that "Session management performance is optimum when session data per user is around 2Kb. It degrades if session data is more than that".

I have following questions.
1. How do you measure session data per user?
2. It is generally recommended that you should keep all the session state in database and keep only the keys in HttpSession object. Then everytime a web request is processed, session data is fetched from the database. This way all the data remains in memory only till the request is processed and actual data in HttpSession is very less. (Only few keys).
What is the general practice?
At what point you should be switching from keeping data in HttpSession to database?
Are websites like Amazon or eBay follow this?
3. Is there any open source framework which helps you do session management in a way mentioned in point no. 2?

Thanks,
Unmesh
Thanks,
Unmesh

Kafka 101

This is a guest article by Stanislav Kozlovski, an Apache Kafka Committer. If you would like to connect with Stanislav, you can do so on Twitter and LinkedIn. Originally developed in LinkedIn during 2011, Apache Kafka is one of the most popular open-source Apache projects out there. So far it

Capturing A Billion Emo(j)i-ons

This blog post was written by Dedeepya Bonthu. This is a repost from her Medium article, approved by the author. In stadiums, sports fans love to express themselves by cheering for their favorite teams, holding up placards and team logos. Emoji’s allow fans at home to rapidly express themselves,

Brief History of Scaling Uber

This blog post was written by Josh Clemm, Senior Director of Engineering at Uber Eats. This is a repost from his LinkedIn article, approved by the author. On a cold evening in Paris in 2008, Travis Kalanick and Garrett Camp couldn't get a cab. That's when

Behind AWS S3’s Massive Scale

This is a guest article by Stanislav Kozlovski, an Apache Kafka Committer. If you would like to connect with Stanislav, you can do so on Twitter and LinkedIn. AWS S3 is a service every engineer is familiar with. It’s the service that popularized the notion of cold-storage to the

Read more

Kafka 101

Capturing A Billion Emo(j)i-ons

Brief History of Scaling Uber

Behind AWS S3’s Massive Scale