Installed Terracotta (windows version) in two PCs of a local area network. For single machine, just launch a demo multiple times to see it work, for two machines, it seemed need to change the configure file by hand, I changed the tc-config.xml files inside each demo’s directory in one PC(remain another unchanged) and the launch them, they worked fine exactly as what they run in one computer. There is some latency in different computer, the network traffic seemed not too much for those simple tests.

Tomorrow I will try a much bigger test to deploy a *BIG* web project I am working on to see how easy it a web app can be deployed on Terracotta and at least see if it work correctly.

During I evaluate Terracotta, I began remember last year I ever ask one member in one of my project team to evaluate Terracotta (because I do remember the screen of that shared image editor!) but at last he suggest not to use it, I didn’t do the evaluation myself, so just let it be forgotten. I will try to search inside my email to see if I could find that report and find out why we gave it up. Also I wish Terracotta have been improved a lot during this year.

From their blog, it seemed really sexy:

Tomcat’s build in session replication performance was poor as we tested. In my last project, we didn’t use session replication and use a “share nothing” approach which store key information in a cookie.

I also saw some solution(in Chinese) to use memcached as a centralized session store, which also seemed to be very promissing.

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