Peer-to-peer systems are positioned to take advantage of
gains in network bandwidth, storage capacity, and computational resources
to provide long-term durable storage infrastructures.
In this paper, we quantitatively compare building a distributed storage
infrastructure that is self-repairing and resilient to faults using either
a replicated system or an erasure-resilient system.
We show that systems employing erasure codes have mean time to failures
many orders of magnitude higher than replicated systems with similar storage
and bandwidth requirements. More importantly, erasure-resilient systems use
an order of magnitude less bandwidth and storage to provide similar system
durability as replicated systems.
[ Paper: PDF(117K),
Last modified on 04/10/2002 by Hakim Weatherspoon.