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MapReduce >> mail # user >> copy files from hdfs to local fs

Chengi Liu 2013-08-29, 20:35
Chengi Liu 2013-08-29, 20:50
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RE: copy files from hdfs to local fs
What's wrong by using old Unix pipe?
hadoop fs -cat /user/input/foo.txt | head -100 > local_file

Date: Thu, 29 Aug 2013 13:50:37 -0700
Subject: Re: copy files from hdfs to local fs

tail will work as well.. ??? but i want to extract just (say) n lines out of this file?

On Thu, Aug 29, 2013 at 1:43 PM, Kim Chew <[EMAIL PROTECTED]> wrote:

hadoop fs -copyToLocal
hadoop fs -get

It copies the whole file and won't be able just to copy part of the file, what is interesting is there is a "tail" command but no "head".

On Thu, Aug 29, 2013 at 1:35 PM, Chengi Liu <[EMAIL PROTECTED]> wrote:
  A very stupid question...
I have a large file in
I want to copy first 100 lines from this location to local filesystem...

And the data is very sensitive so i am bit hesistant to experiment.
What is the right way to copy sample data from hdfs to local fs.