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From "Eric Newton (JIRA)" <>
Subject [jira] [Created] (ACCUMULO-3813) single row look-ups are slow
Date Wed, 13 May 2015 14:10:00 GMT
Eric Newton created ACCUMULO-3813:

             Summary: single row look-ups are slow
                 Key: ACCUMULO-3813
             Project: Accumulo
          Issue Type: Improvement
          Components: client, tserver
            Reporter: Eric Newton

Emilio Lahr-Vivaz writes on the user mailing list:

I've found that scanning lots of non-sequential single-row ranges is pretty slow in accumulo.
Your best approach is probably to create an index table on whatever you are originally trying
to query (assuming those 10000 ids came from some other query).

Specifically, the use case is fetching many single items, all of which are present (so, bloom
filters aren't going to help).

Since this is one of the use cases Accumulo was designed to handle, look into actual performance
and figure out if there are any obvious bottlenecks.

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