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First Workshop on Real, Large Distributed Systems — Abstract
Towards a Deployable IP Anycast Service
Hitesh Ballani and Paul Francis, Cornell University
Abstract
Since it was first described in 1993, IP anycast has been a
promising technology for simple, efficient, and robust service
discovery, and for connectionless services. Due to scaling issues,
the difficulty of deployment, and lack of application-specific
features such as load balancing and connection affinity, the use
of IP anycast is limited to a small number of critical low-level
services such as DNS root server replication. More commonly,
application-layer anycast, such as DNS-based redirection, is used.
As the number of P2P and overlay services grows, however, the
advantages of IP anycast become more appealing. This paper
proposes a new proxy overlay deployment model for IP anycast that
overcomes most of the limitations of native IP
anycast.
We believe that this makes IP anycast a viable option for easing deployment
and improving the
robustness and efficiency of many P2P and overlay technologies.
We describe the new deployment model, some of its uses for P2P and overlay
networks, its pros and cons
relative to application-layer anycast, and discuss research
issues.
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