Archive For June 13, 2009

Erasure Coding and Cold Storage

Erasure coding provides redundancy for greater than single disk failure without 3x or higher redundancy. I still like full mirroring for hot data but the vast majority of the worlds data is cold and much of it never gets referenced after writing it: Measurement and Analysis of Large-Scale Network File System Workloads. For less-than-hot workloads,…

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