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Uploaded on Dec 23, 2011
Many NoSQL databases eschew RAID and use a 3-replica system for protecting against data loss. These systems are tricky to operate at scale, and only a limited number of organizations are attempting to operate high-availability production systems of this type. At blekko, a new web-scale search engine, we have operated our home-grown NoSQL database for 3.5 years with high uptime and very graceful degradation in the face of hardware failures - come learn about the features we found were key for achieving this.