Traditionally, user-focused Web-application monitoring has been restricted to static log analysis or other forms of Web analytics. TeaLeaf Technology, a pioneer in user-based transaction monitoring since 1999, challenges this notion with its RealiTea platform. While not covered in a hands-on test, our interactions with the RealiTea platform through extensive demonstrations from TeaLeaf suggest it is a mature product that provides a superset of the user activity-monitoring and debugging features found in the xFire platform we tested.

The RealiTea platform takes the stance that what the user sees is the most important consideration. User session data is collected in a passive manner via a capture appliance attached to the spanning port of a switch or load balancer. Not having to install collection agents on origin Web servers reduces the chance for any performance and stability impact, and actually makes the system easier to deploy in large-scale environments.

The packet capture and reassembly of user sessions that RealiTea completes is more complex than simply monitoring HTTP sessions directly on a server. But that complexity provides the ability to get timing information regarding end-user performance by looking at TCP acknowledgments. This capability is quite valuable when trying to determine exactly what the end user experienced.

After initial data capture, information is fed to a Windows 2000/2003 box running the RealiTea server software. During this stage, TeaLeaf allows filters to run against collected data because not all data can be useful for customer support, monitoring or debugging purposes. RealiTea can provide near real-time observation of site health and activity because captured data is initially aggregated and analyzed in a short-term memory database before it is moved to more long-term storage.

As data is collected, a Web browser can access a portal on a locally deployed RealiTea server to perform queries and monitor activity. The maturity of the platform is evident in the ease with which data can be searched and navigated. Drilling down into graphs, search results and alerts to a particular session, and then starting a session replay in the RealiTea Viewer is extremely natural.

The RealiTea Viewer session playback engine is very refined and clearly highlights user data entry and activity. Unfortunately because this viewer is also Internet Explorer-based it doesn't address the fact that browser-level issues can be important, and provides no way to playback sessions in a non-Internet Explorer browsers to address any problems related to client-side technology such as JavaScript.

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