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Posted to dev@hbase.apache.org by "Eshcar Hillel (JIRA)" <ji...@apache.org> on 2016/12/19 14:36:58 UTC

[jira] [Created] (HBASE-17339) Scan-Memory-First Optimization

Eshcar Hillel created HBASE-17339:
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             Summary: Scan-Memory-First Optimization
                 Key: HBASE-17339
                 URL: https://issues.apache.org/jira/browse/HBASE-17339
             Project: HBase
          Issue Type: Improvement
            Reporter: Eshcar Hillel


The current implementation of a get operation (to retrieve values for a specific key) scans through all relevant stores of the region; for each store both memory components (memstores segments) and disk components (hfiles) are scanned in parallel.
We suggest to apply an optimization that speculatively scans memory-only components first and only if the result is incomplete scans both memory and disk.



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