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From Bejoy KS <bejoy.had...@gmail.com>
Subject Re: Issues starting TaskTracker
Date Tue, 13 Sep 2011 09:37:35 GMT
Shreya
       To add on. From cloudera website you would get images for different
VMs like VM Ware, Virtual Box etc. Choose the appropriate one for your use
as per your availabe software.
      To your question, it is definitely possible to run map reduce progarms
from Cloudera VM and in fact it is the most comfortable way(at least for me)
to test my map reduce code. When you are on cloudera VM to test your plain
map reduce code in fact you don't even need to pack your source code into
jar, deploy the same and then execute it.(now you might be doing development
in windows and deployment and test in linux) To test your code just follow
the sequence of steps

   - Download and install eclipse on the VM (any IDE you are on)
   - Create your project with Mapper, Reducer and Driver classes (may be a
   single file also would be fine as per your convenience)
   - Click on the class that contains your main method, give run as java
   application
   - It'd do the job for you.

The few things you need to keep in mind are

   - Use very minimal test data. Larger data volumes would lead to very slow
   execution due to limited resources.(just use VM to test the logic)
   - Normally in our driver class we get the input and output directory from
   command line when we deploy as jars and run the same, but when you run from
   eclipse just alter the lines of code specifying input and output as

       For input and output directory in hdfs
            FileInputFormat.addInputPath(job, new
Path("hdfs://localhost/<full path in hdfs>"));
            FileOutputFormat.setOutputPath(job, new
Path(hdfs://localhost/<full path in hdfs>"));

       For input and output directory in lfs
            FileInputFormat.addInputPath(job, new Path("<full path in
lfs>"));
            FileOutputFormat.setOutputPath(job, new Path("<full path in
lfs>"));

Hope it helps

Regards
Bejoy.K.S


On Tue, Sep 13, 2011 at 2:40 PM, Bejoy KS <bejoy.hadoop@gmail.com> wrote:

> Hi Shreya
>          You can copy files from windows to the linux on VM using any ftp
> tools like filezilla.
> Take a terminal on your linix, type ifconfig , the value given under 'inet
> addr:'  would be your IP address.
> Use this IP address and default port (22) to connect to liux image from
> Windows through filezilla. The Cloudera VM has the user name and password as
> 'cloudera' itself.
>
> Hope It helps
>
> Regards
> Bejoy.KS
>
>
> On Tue, Sep 13, 2011 at 2:18 PM, <Shreya.Pal@cognizant.com> wrote:
>
>>
>> Hi Harsh,
>>
>> Version of Hadoop - hadoop-0.20.203.0
>> How do I make the process owner same as directory owner
>> Directory owner is - Titun
>>
>> Regards
>> Shreya
>>
>> -----Original Message-----
>> From: Harsh J [mailto:harsh@cloudera.com]
>> Sent: Monday, September 12, 2011 10:50 PM
>> To: mapreduce-user@hadoop.apache.org
>> Subject: Re: Issues starting TaskTracker
>>
>> Shreya,
>>
>> > I was getting the message owner SYSTEM when I was using default
>> > I was getting the message - running as TITUN, but the same error
>>
>> What user are you actually launching the TaskTracker as? The directory
>> owner (user) must be == process owner (user) of the TT, and things
>> should be fine! Can you confirm that this isn't the case? What version
>> of Hadoop are you using?
>>
>> P.s. Am really beginning to dislike MS Exchange or your sysadmin's
>> mailer settings here :-)
>>
>> On Mon, Sep 12, 2011 at 9:23 PM,  <Shreya.Pal@cognizant.com> wrote:
>> > This e-mail and any files transmitted with it are for the sole use of
>> the intended recipient(s) and may contain confidential and privileged
>> information.
>> > If you are not the intended recipient, please contact the sender by
>> reply e-mail and destroy all copies of the original message.
>> > Any unauthorised review, use, disclosure, dissemination, forwarding,
>> printing or copying of this email or any action taken in reliance on
>> this e-mail is strictly
>> > prohibited and may be unlawful.
>>
>>
>>
>> --
>> Harsh J
>>
>> This e-mail and any files transmitted with it are for the sole use of the
>> intended recipient(s) and may contain confidential and privileged
>> information.
>> If you are not the intended recipient, please contact the sender by reply
>> e-mail and destroy all copies of the original message.
>> Any unauthorised review, use, disclosure, dissemination, forwarding,
>> printing or copying of this email or any action taken in reliance on this
>> e-mail is strictly
>> prohibited and may be unlawful.
>>
>
>

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