Summary: Fine­Grained Failover Using Connection Migration
Alex C. Snoeren, David G. Andersen, and Hari Balakrishnan
MIT Laboratory for Computer Science
Cambridge, MA 02139
{snoeren, dga, hari}@lcs.mit.edu
Abstract
This paper presents a set of techniques for providing
fine­grained failover of long­running connections across
a distributed collection of replica servers, and is espe­
cially useful for fault­tolerant and load­balanced delivery
of streaming media and telephony sessions. Our system
achieves connection­level failover across both local­ and
wide­area server replication, without requiring a front­
end transport­ or application­layer switch. Our approach
uses recently proposed end­to­end ``connection migra­
tion'' mechanisms for transport protocols such as TCP,
combined with a soft­state session synchronization pro­
tocol between replica servers.
The end result is a robust, fast, and fine­grained connec­
tion failover mechanism that is transparent to client ap­

Source: Andersen, Dave - School of Computer Science, Carnegie Mellon University
Massachusetts Institute of Technology (MIT), Department of Electrical Engineering and Computer Science, Database Group

Collections: Computer Technologies and Information Sciences