memcached is a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.
Collaborative tagging describes the process by which many users add metadata in the form of keywords to shared content. Recently, collaborative tagging has grown in popularity on the web, on sites that allow users to tag bookmarks, photographs and other content. In this paper we analyze the structure of collaborative tagging systems as well as their dynamical aspects. Specifically, we discovered regularities in user activity, tag frequencies, kinds of tags used, bursts of popularity in bookmarking and a remarkable stability in the relative proportions of tags within a given url. We also present a dynamical model of collaborative tagging that predicts these stable patterns and relates them to imitation and shared knowledge.
S. Wunderlich, M. Ring, D. Landes, and A. Hotho. CISIS-ICEUTE, volume 951 of Advances in Intelligent Systems and Computing, page 14-24. Springer, (2019)
S. Niwa, T. Doi, and S. Honiden. ITNG '06: Proceedings of the Third International Conference on Information Technology: New Generations (ITNG'06), page 388--393. Washington, DC, USA, IEEE Computer Society, (2006)