This is my personal blog. The views expressed on these pages are mine alone and not those of my employer.

Friday, September 26, 2003

High Availability, Scalable Storage, Dynamic Peer Networks: Pick Two: "Abstract
Peer-to-peer storage aims to build large-scale, reliable
and available storage from many small-scale unreliable,
low-availability distributed hosts. Data redundancy
is the key to any data guarantees. However, preserving
redundancy in the face of highly dynamic membership
is costly. We use a simple resource usage model to measured
behavior from the Gnutella file-sharing network to
argue that large-scale cooperative storage is limited by
likely dynamics and cross-system bandwidth —not by
local disk space. We examine some bandwidth optimization
strategies like delayed response to failures, admission
control, and load-shifting and find that they do not
alter the basic problem. We conclude that when redundancy,
data scale, and dynamics are all high, the needed
cross-system bandwidth is unreasonable."

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