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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2246) Shortcut a local client reads to a Datanodes files directly
Date Tue, 30 Aug 2011 16:37:39 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2246?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HDFS-2246:
---------------------------------

    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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