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The LearningOnline Network with CAPA

Home > What is LON-CAPA? > LON-CAPA for IT-Managers > Scalability


LON-CAPA implements a network of two classes of servers:
  • Library Servers hold the authoriative copies of content resources and of user data. An institution can run any number of library machines, and users can be shifted between machines with a few hours downtime. Library servers can double as access servers and run user sessions, which is particularly interesting for small installations. Library servers need backup.
  • Access Servers only run user sessions and do not need backup. They can be brought online and taken offline with minimal downtime.
LON-CAPA can load-balance across the entire network, meaning, session can (if so configured) even be offloaded across institutional boundaries. This can be implemented on a peer-to-peer level, where one server offloads sessions to another one, or with a LON-CAPA load-balancer at the frontend.

Contact Us: lon-capa@lon-capa.org

Site maintained by Gerd Kortemeyer.
Supported by the National Science Foundation under NSF-ITR 0085921, NSF-CCLI-ASA 0243126, and NSF-CCLI 0717790. Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Initial funding for CAPA has been provided by the Alfred. P. Sloan Foundation and the Andrew W. Mellon Foundation.

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