Links for 2012-02-12

  • Turbocharging Solr Index Replication with BitTorrent : Etsy now replicating their multi-GB search index across the search farm using BitTorrent. Why not Multicast? ‘multicast rsync caused an epic failure for our network, killing the entire site for several minutes. The multicast traffic saturated the CPU on our core switches causing all of Etsy to be unreachable.’ fun!
    (tags: etsy multicast sev1 bittorrent search solr rsync scaling outages)

  • Apache Kafka : ‘Kafka provides a publish-subscribe solution that can handle all activity stream data and processing on a consumer-scale web site. This kind of activity (page views, searches, and other user actions) are a key ingredient in many of the social feature on the modern web. This data is typically handled by “logging” and ad hoc log aggregation solutions due to the throughput requirements. This kind of ad hoc solution is a viable solution to providing logging data to an offline analysis system like Hadoop, but is very limiting for building real-time processing. Kafka aims to unify offline and online processing by providing a mechanism for parallel load into Hadoop as well as the ability to partition real-time consumption over a cluster of machines.’ neat
    (tags: kafka linkedin apache distributed messaging pubsub queue incubator scaling)

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