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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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Andrew Purtell updated HDFS-2246:
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Attachment: 0001-HDFS-347.-Local-reads.patch
Attached is an 0.20-ish patch ported from our production tree to an ASF
derivative:
https://github.com/trendmicro/hadoop-common/tree/0.20-security-append-HDFS-347
(The 0.20-security-append tree, based on security-204, is here:
https://github.com/trendmicro/hadoop-common/tree/0.20-security-append)
The attached patch is this change:
https://github.com/trendmicro/hadoop-common/commit/18971523a9260acbe920c3da0c5a2623eacec1d2
This was initially Ryan Rawson's patch for 0.20-append on HDFS-347, later
merged with the checksumming improvements from Facebook, and merged with our
enhancements and fixups for security and metrics v2. It includes a new metric
for the number of times clients successful get a local path to block data.
> 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
> Attachments: 0001-HDFS-347.-Local-reads.patch
>
>
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