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Hadoop, mail # user - Loading Data to HDFS


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sumit ghosh 2012-10-30, 10:07
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M. C. Srivas 2012-10-30, 14:24
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Ranjith 2012-10-31, 04:42
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Bertrand Dechoux 2012-10-30, 10:16
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Re: Loading Data to HDFS
sumit ghosh 2012-10-30, 10:39
Hi Bertrand,
 
By Physically movi ng the data do you mean that the data volume is connected to the gateway machine and the data is loaded from the local copy using copyFromLocal?
 
Thanks,
Sumit
________________________________
From: Bertrand Dechoux <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]; sumit ghosh <[EMAIL PROTECTED]>
Sent: Tuesday, 30 October 2012 3:46 PM
Subject: Re: Loading Data to HDFS

It might sound like a deprecated way but can't you move the data physically?
From what I understand, it is one shot and not "streaming" so it could be a
good method if you the access of course.

Regards

Bertrand

On Tue, Oct 30, 2012 at 11:07 AM, sumit ghosh <[EMAIL PROTECTED]> wrote:

> Hi,
>
> I have a data on remote machine accessible over ssh. I have Hadoop CDH4
> installed on RHEL. I am planning to load quite a few Petabytes of Data onto
> HDFS.
>
> Which will be the fastest method to use and are there any projects around
> Hadoop which can be used as well?
>
>
> I cannot install Hadoop-Client on the remote machine.
>
> Have a great Day Ahead!
> Sumit.
>
>
> ---------------
> Here I am attaching my previous discussion on CDH-user to avoid
> duplication.
> ---------------
> On Wed, Oct 24, 2012 at 9:29 PM, Alejandro Abdelnur <[EMAIL PROTECTED]>
> wrote:
> in addition to jarcec's suggestions, you could use httpfs. then you'd only
> need to poke a single host:port in your firewall as all the traffic goes
> thru it.
> thx
> Alejandro
>
> On Oct 24, 2012, at 8:28 AM, Jarek Jarcec Cecho <[EMAIL PROTECTED]>
> wrote:
> > Hi Sumit,
> > there is plenty of ways how to achieve that. Please find my feedback
> below:
> >
> >> Does Sqoop support loading flat files to HDFS?
> >
> > No, sqoop is supporting only data move from external database and
> warehouse systems. Copying files is not supported at the moment.
> >
> >> Can use distcp?
> >
> > No. Distcp can be used only to copy data between HDFS filesystesm.
> >
> >> How do we use the core-site.xml file on the remote machine to use
> >> copyFromLocal?
> >
> > Yes you can install hadoop binaries on your machine (with no hadoop
> running services) and use hadoop binary to upload data. Installation
> procedure is described in CDH4 installation guide [1] (follow "client"
> installation).
> >
> > Another way that I can think of is leveraging WebHDFS [2] or maybe
> hdfs-fuse [3]?
> >
> > Jarcec
> >
> > Links:
> > 1: https://ccp.cloudera.com/display/CDH4DOC/CDH4+Installation
> > 2:
> https://ccp.cloudera.com/display/CDH4DOC/Deploying+HDFS+on+a+Cluster#DeployingHDFSonaCluster-EnablingWebHDFS
> > 3: https://ccp.cloudera.com/display/CDH4DOC/Mountable+HDFS
> >
> > On Wed, Oct 24, 2012 at 01:33:29AM -0700, Sumit Ghosh wrote:
> >>
> >>
> >> Hi,
> >>
> >> I have a data on remote machine accessible over ssh. What is the fastest
> >> way to load data onto HDFS?
> >>
> >> Does Sqoop support loading flat files to HDFS?
> >> Can use distcp?
> >> How do we use the core-site.xml file on the remote machine to use
> >> copyFromLocal?
> >>
> >> Which will be the best to use and are there any other open source
> projects
> >> around Hadoop which can be used as well?
> >> Have a great Day Ahead!
> >> Sumit
--
Bertrand Dechoux
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Bertrand Dechoux 2012-10-30, 11:10
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sumit ghosh 2012-10-30, 13:25
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Alejandro Abdelnur 2012-10-30, 13:12