This paper analyzes the scalability of Instant Messaging & Presence (IM&P) architectures. We take a queueing-based modelling and analysis approach to find the bottlenecks of the current IM&P architecture at the Dutch social network Hyves, as well as to analyse three alternative architectures: evolutionary partitioning, aggregated, batched presence updates and presence subscriptions. We use the Hierarchical Evaluation Tool (HIT) to create and analyse models analytically. Based on these results, we recommend a new architecture that provides better scalability than the current one. © 2010 Elsevier B.V. All rights reserved.
Schippers, J., Remke, A., Punt, H., Wegdam, M., & Haverkort, B. (2010). A Massively Scalable Architecture For Instant Messaging & Presence. Electronic Notes in Theoretical Computer Science, 261(C), 109–130. https://doi.org/10.1016/j.entcs.2010.01.008