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Posted to notifications@asterixdb.apache.org by "Chen Luo (JIRA)" <ji...@apache.org> on 2018/01/15 18:49:00 UTC

[jira] [Created] (ASTERIXDB-2243) Bloomfilter size is overly calculated for update-heavy workloads

Chen Luo created ASTERIXDB-2243:
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             Summary: Bloomfilter size is overly calculated for update-heavy workloads
                 Key: ASTERIXDB-2243
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-2243
             Project: Apache AsterixDB
          Issue Type: Bug
          Components: STO - Storage
            Reporter: Chen Luo
            Assignee: Chen Luo


The current bloom filter calculation assumes the data is append-only without updates. Each bloom filter maintains the number of elements. When bulkload a new bloom filter through merge, the new size is simply the sum of all sizes. However, in a update-heavy workloads, even though the actual size of the merged disk component does not increase, the estimated bloom filter size will keep increasing and consume too much space.

 



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