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Posted to issues@hbase.apache.org by "nkeywal (JIRA)" <ji...@apache.org> on 2011/07/22 19:17:58 UTC

[jira] [Updated] (HBASE-1938) Make in-memory table scanning faster

     [ https://issues.apache.org/jira/browse/HBASE-1938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

nkeywal updated HBASE-1938:
---------------------------

    Attachment: MemStoreScanPerformance.java

> Make in-memory table scanning faster
> ------------------------------------
>
>                 Key: HBASE-1938
>                 URL: https://issues.apache.org/jira/browse/HBASE-1938
>             Project: HBase
>          Issue Type: Improvement
>          Components: performance
>            Reporter: stack
>            Assignee: stack
>            Priority: Blocker
>         Attachments: MemStoreScanPerformance.java, MemStoreScanPerformance.java, caching-keylength-in-kv.patch, test.patch
>
>
> This issue is about profiling hbase to see if I can make hbase scans run faster when all is up in memory.  Talking to some users, they are seeing about 1/4 million rows a second.  It should be able to go faster than this (Scanning an array of objects, they can do about 4-5x this).

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