[ NNSquad ] Google: "Availability in Globally Distributed Storage Systems"

[Lauren Weinstein <lauren@vortex.com>]

Google: "Availability in Globally Distributed Storage Systems"

http://j.mp/dPqtHC  (Google Research [PDF])

    Highly available cloud storage is often implemented with
    complex, multi-tiered distributed systems built on top
    of clusters of commodity servers and disk drives. Sophisticated
    management, load balancing and recovery
    techniques are needed to achieve high performance and
    availability amidst an abundance of failure sources that
    include software, hardware, network connectivity, and
    power issues. While there is a relative wealth of failure
    studies of individual components of storage systems,
    such as disk drives, relatively little has been reported so
    far on the overall availability behavior of large cloudbased
    storage services.

    We characterize the availability properties of cloud
    storage systems based on an extensive one year study of
    Google's main storage infrastructure and present statistical
    models that enable further insight into the impact
    of multiple design choices, such as data placement and
    replication strategies.

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--Lauren--
Lauren Weinstein (lauren@vortex.com): http://www.vortex.com/lauren
Co-Founder: People For Internet Responsibility: http://www.pfir.org
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