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https://issues.apache.org/jira/browse/HDFS-2246?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jitendra Nath Pandey updated HDFS-2246:
---------------------------------------
Target Version/s: 0.20.205.1, 0.24.0, 0.23.1 (was: 0.23.1, 0.24.0,
0.20.205.1)
Release Note:
#New configurations
## dfs.block.local-path-access.user is the key in datanode configuration to
specify the user allowed to do short circuit read.
## dfs.client.read.shortcircuit is the key to enable short circuit read at the
client side configuration.
## dfs.client.read.shortcircuit.skip.checksum is the key to bypass checksum
check at the client side.
#By default none of the above are enabled and short circuit read will not kick
in.
#The feature can be used only for user that has kerberos credentials at the
client, therefore map reduce tasks cannot benefit from it in general.
was:
# dfs.block.local-path-access.user is the key in datanode configuration to
specify the user allowed to do short circuit read.
# dfs.client.read.shortcircuit is the key to enable short circuit read at the
client side configuration.
# dfs.client.read.shortcircuit.checksum is the key to bypass checksum check at
the client side.
By default none of the above are enabled and short circuit read will not kick
in.
> Shortcut a local client reads to a Datanodes files directly
> -----------------------------------------------------------
>
> Key: HDFS-2246
> URL: https://issues.apache.org/jira/browse/HDFS-2246
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Sanjay Radia
> Assignee: Jitendra Nath Pandey
> Fix For: 0.24.0
>
> Attachments: 0001-HDFS-347.-Local-reads.patch,
> HDFS-2246-branch-0.20-security-205.1.patch,
> HDFS-2246-branch-0.20-security-205.2.patch,
> HDFS-2246-branch-0.20-security-205.patch,
> HDFS-2246-branch-0.20-security-205.patch,
> HDFS-2246-branch-0.20-security-205.patch,
> HDFS-2246-branch-0.20-security.3.patch,
> HDFS-2246-branch-0.20-security.no-softref.patch,
> HDFS-2246-branch-0.20-security.patch, HDFS-2246-branch-0.20-security.patch,
> HDFS-2246-branch-0.20-security.patch, HDFS-2246-branch-0.20-security.patch,
> HDFS-2246-trunk.patch, HDFS-2246-trunk.patch, HDFS-2246-trunk.patch,
> HDFS-2246-trunk.patch, HDFS-2246-trunk.patch, HDFS-2246-trunk.patch,
> HDFS-2246.20s.1.patch, HDFS-2246.20s.2.txt, HDFS-2246.20s.3.txt,
> HDFS-2246.20s.4.txt, HDFS-2246.20s.patch, TestShortCircuitLocalRead.java,
> localReadShortcut20-security.2patch
>
>
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