Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.9.0, 2.0.0
    • Component/s: None

      Description

      Accumulo has a pool of recently opened connections to tablet servers.  When connecting to tablet servers, this pool is checked first. The pool is built around a map of list.  There are two problems with this pool :

      • It has global lock around the map of list
      • When trying to find a connection it does a linear search for a non reserved connection (this is per tablet server)

      Could possibly move to a model of having a list of unreserved connections and a set of reserved connections per tablet server. Then to get a connection, could remove from the unreserved list and add to the reserved set.  This would be a constant time operation.

      For the locking, could move to a model of using a concurrent map and locking per tserver instead of locking the entire map.

       

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              • Assignee:
                kturner Keith Turner
                Reporter:
                kturner Keith Turner
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