Importing Data to HDFS

[Urckle <ur...@gmail.com>]

Scenario:
Hadoop version: 0.20.2
MR coding will be done in java.


Just starting out with my first Hadoop setup. I would like to know are 
there any best practice ways to load data into the dfs? I have 
(obviously) manually put data files into hdfs using the shell commands 
while playing with it at setup but going forward I will want to be 
retrieving large numbers of data feeds from remote, 3rd party locations 
and throwing them into hadoop for analysis later. What is the best way 
to automate this? Is it to gather the retrieved files into known 
locations to be mounted and then automate via script etc. to put the 
files into hdfs? Or is there some other practice? I've not been able to 
find specific use case yet... all docs cover the basic fs command 
without giving much details about more advanced setups.

thanks for any info

regards

Re: Importing Data to HDFS

[Jeff Hammerbacher <ha...@cloudera.com>]

Hey Urckle,

I'm biased, but I'd recommend checking out Sqoop (
http://github.com/cloudera/sqoop) for moving data from RDBMS systems into
HDFS/Hive/HBase and Flume (http://github.com/cloudera/flume) for moving log
files into HDFS/Hive/HBase.

For moving large sets of files into HDFS, I think distcp (
http://archive.cloudera.com/cdh/3/hadoop-0.20.2+320/distcp.html) is your
best bet.

Thanks,
Jeff

On Fri, Jul 16, 2010 at 4:51 AM, Urckle <ur...@gmail.com> wrote:

> Scenario:
> Hadoop version: 0.20.2
> MR coding will be done in java.
>
>
> Just starting out with my first Hadoop setup. I would like to know are
> there any best practice ways to load data into the dfs? I have (obviously)
> manually put data files into hdfs using the shell commands while playing
> with it at setup but going forward I will want to be retrieving large
> numbers of data feeds from remote, 3rd party locations and throwing them
> into hadoop for analysis later. What is the best way to automate this? Is it
> to gather the retrieved files into known locations to be mounted and then
> automate via script etc. to put the files into hdfs? Or is there some other
> practice? I've not been able to find specific use case yet... all docs cover
> the basic fs command without giving much details about more advanced setups.
>
> thanks for any info
>
> regards
>