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From Jay Vyas <jayunit...@gmail.com>
Subject Re: Configuring SSH - is it required? for a psedo distriburted mode?
Date Thu, 16 May 2013 15:31:56 GMT
Yes it is required -- in psuedodistributed node the jobtracker is not
necessarily aware that the task trackers  / data nodes are on the same
machine, and will thus attempt to ssh into them when starting the
respective deamons etc (i.e. start-all.sh)


On Thu, May 16, 2013 at 11:21 AM, kishore alajangi <
alajangikishore@gmail.com> wrote:

> When you start the hadoop procecess, each process will ask the password to
> start, to overcome this we will configure SSH if you use single node or
> multiple nodes for each process, if you can enter the password for each
> process Its not a mandatory even if you use multiple systems.
>
> Thanks,
> Kishore.
>
>
> On Thu, May 16, 2013 at 8:24 PM, Raj Hadoop <hadoopraj@yahoo.com> wrote:
>
>>  Hi,
>>
>> I have a dedicated user on Linux server for hadoop. I am installing it in
>> psedo distributed mode on this box. I want to test my programs on this
>> machine. But i see that in installation steps - they were mentioned that
>> SSH needs to be configured. If it is single node, I dont require it
>> ...right? Please advise.
>>
>> I was looking at this site
>>
>> http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/
>>
>> It menionted like this -
>> "
>> Hadoop requires SSH access to manage its nodes, i.e. remote machines plus
>> your local machine if you want to use Hadoop on it (which is what we want
>> to do in this short tutorial). For our single-node setup of Hadoop, we
>> therefore need to configure SSH access to localhost for the hduser user
>> we created in the previous section.
>> "
>>
>> Thanks,
>> Raj
>>
>>
>
>


-- 
Jay Vyas
http://jayunit100.blogspot.com

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