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https://issues.apache.org/jira/browse/HBASE-17917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15989763#comment-15989763
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Lars Hofhansl commented on HBASE-17917:
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The title does not quite reflect the patch, since it does try to switch to
streaming reads.
Couple of question:
# did you try with many store files and with many column families. preads even
when followed by a switch to streaming involve a lot of seeking.
# which version of HDFS did you test this against? Does that version have
HDFS-6735 fixed?
# what's the load on the data nodes that you observe?
> Use pread by default for all user scan
> --------------------------------------
>
> Key: HBASE-17917
> URL: https://issues.apache.org/jira/browse/HBASE-17917
> Project: HBase
> Issue Type: Sub-task
> Components: scan
> Affects Versions: 2.0.0
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Fix For: 2.0.0
>
> Attachments: HBASE-17917.patch, HBASE-17917-v1.patch,
> HBASE-17917-v2.patch, HBASE-17917-v2.patch, HBASE-17917-v3.patch,
> HBASE-17917-v4.patch, HBASE-17917-v5.patch
>
>
> As said in the parent issue. We need some benchmark here first.
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