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https://issues.apache.org/jira/browse/HBASE-10884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13992483#comment-13992483
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Weichen Ye commented on HBASE-10884:
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I meet the same problem...
> [REST] Do not disable block caching when scanning
> -------------------------------------------------
>
> Key: HBASE-10884
> URL: https://issues.apache.org/jira/browse/HBASE-10884
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.98.1, 0.99.0
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Fix For: 0.99.0, 0.98.2
>
> Attachments: HBASE-10884.patch
>
>
> The REST gateway pessimistically disables block caching when issuing Scans to
> the cluster, using Scan#setCacheBlocks(false) in ScannerResultGenerator. It
> does not do this when issuing Gets on behalf of HTTP clients in
> RowResultGenerator. This is an old idea now, the reasons for doing so lost
> sometime back in the era when HBase walked the earth with dinosaurs (< 0.20).
> We probably should not be penalizing REST scans in this way.
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