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Posted to issues@hbase.apache.org by "Eshcar Hillel (JIRA)" <ji...@apache.org> on 2017/01/26 09:16:24 UTC

[jira] [Updated] (HBASE-17339) Scan-Memory-First Optimization for Get Operations

     [ https://issues.apache.org/jira/browse/HBASE-17339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eshcar Hillel updated HBASE-17339:
----------------------------------
    Summary: Scan-Memory-First Optimization for Get Operations  (was: Scan-Memory-First Optimization for Get Operation)

> Scan-Memory-First Optimization for Get Operations
> -------------------------------------------------
>
>                 Key: HBASE-17339
>                 URL: https://issues.apache.org/jira/browse/HBASE-17339
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Eshcar Hillel
>         Attachments: HBASE-17339-V01.patch
>
>
> 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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