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From Jérôme BAROTIN <jer...@barotin.fr>
Subject Re: cp command in webhdfs (and Filesystem Java Object)
Date Wed, 29 Jun 2016 07:44:02 GMT
I'm not thinking that is the same :
- CREATE is for a local file : in my case, I just want to copy one hdfs
path to another on the same cluster
- Distcp, is for copying file between two differents clusters.

I'm using HTTPFs/webhdfsREST API to acces to my cluster, and I need to
execute a "cp" command. How can I do that ?

Do I need to develop this service ?


2016-06-29 8:17 GMT+02:00 Rohan Rajeevan <rohan.rajeevan@gmail.com>:

> May be look at this?
> https://hadoop.apache.org/docs/r1.0.4/webhdfs.html#CREATE
> If you are interested in intra cluster copy, may look at DistCp
> <https://hadoop.apache.org/docs/current/hadoop-distcp/DistCp.html>?
> On Tue, Jun 28, 2016 at 9:36 AM, Jérôme BAROTIN <jerome@barotin.fr> wrote:
>> Hello,
>> I'm writing this email, because, I spent one hour to look for a cp
>> command in the webhdfs API (in fact, I'm using HTTPFS, but I think it's the
>> same).
>> This command is implemented in the "hdfs dfs" command line client (and
>> I'm using this command), but, I can't find it on the webhdfs REST API. I
>> thought that webhdfs is an implementation of the Filesystem object (
>> https://hadoop.apache.org/docs/r2.6.1/api/org/apache/hadoop/fs/FileSystem.html).
>> I checked at the Java API and I haven't found any cp command. The only java
>> cp command is on the FileUtil Object (
>> https://hadoop.apache.org/docs/stable/api/org/apache/hadoop/fs/FileUtil.html)
>> and I'm not sure that it work identicaly than "hdfs dfs -cp" command.
>> I also checked at the Hadoop JIRA, and I found nothing :
>> https://issues.apache.org/jira/browse/HADOOP-9417?jql=project%20%3D%20HADOOP%20AND%20(text%20~%20%22webhdfs%20copy%22%20OR%20text%20~%20%22webhdfs%20cp%22)
>> is there a way to execute a cp command through a REST API ?
>> All my best,
>> Jérôme

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