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https://issues.apache.org/jira/browse/HDFS-11786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mukul Kumar Singh updated HDFS-11786:
-------------------------------------
Attachment: HDFS-11786.005.patch
Thanks for the review [~anu], Last patch should fix the check style warnings as
well.
Here is how the new help for the command will look like
{code}
HW13605:multi_thread_upload msingh$
hadoop-dist/target/hadoop-3.0.0-alpha4-SNAPSHOT/bin/hdfs dfs -help copyFromLocal
-copyFromLocal [-f] [-p] [-l] [-d] [-t <thread count>] <localsrc> ... <dst> :
Copy files from the local file system into fs. Copying fails if the file
already
exists, unless the -f flag is given.
Flags:
-p Preserves access and modification times, ownership and the
mode.
-f Overwrites the destination if it already exists.
-t <thread count> Number of threads to be used, default is 1.
-l Allow DataNode to lazily persist the file to disk. Forces
replication factor of 1. This flag will result in reduced
durability. Use with care.
-d Skip creation of temporary file(<dst>._COPYING_).
{code}
> Add support to make copyFromLocal multi threaded
> ------------------------------------------------
>
> Key: HDFS-11786
> URL: https://issues.apache.org/jira/browse/HDFS-11786
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs
> Reporter: Mukul Kumar Singh
> Assignee: Mukul Kumar Singh
> Attachments: HDFS-11786.001.patch, HDFS-11786.002.patch,
> HDFS-11786.003.patch, HDFS-11786.004.patch, HDFS-11786.005.patch
>
>
> CopyFromLocal/Put is not currently multithreaded.
> In case, where there are multiple files which need to be uploaded to the
> hdfs, a single thread reads the file and then copies the data to the cluster.
> This copy to hdfs can be made faster by uploading multiple files in parallel.
> I am attaching the initial patch so that I can get some initial feedback.
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