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MapReduce >> mail # user >> Re: Hadoop


Hadoop is composed of two things ...one is file system mainly hdfs and
another is data processing framework (MapReduce)

Before you go to Big Data, first read about what is hadoop and what are its
usecases

then get into some basic hadoop training and worry later how things work
On Dec 21, 2012 10:53 AM, "Prabakaran Krishnan" <[EMAIL PROTECTED]>
wrote:

> Nitin
> Thanks Nitin... I am very new to hadoop. But I am much interest to know
> about Hadoop.
>
> Could you please explain me Hadoop is a database or Hadoop is approach to
> access the data from database which have big data?
>
> Thanks
> Prabakaran Krishnan
>
>
>
>   *From:* Nitin Pawar <[EMAIL PROTECTED]>
> *To:* user@hadoop.apache.org; Prabakaran Krishnan <
> [EMAIL PROTECTED]>
> *Sent:* Thursday, 20 December 2012 12:55 PM
> *Subject:* Re: insert and update
>
>  there is nothing called update in hadoop
>
> its only either overwrite or append
>
> to write data into hadoop you wither use DFSClient or use hadoop cli to
> put data at the location you want
>
>
> On Thu, Dec 20, 2012 at 12:46 PM, Prabakaran Krishnan <
> [EMAIL PROTECTED]> wrote:
>
>   Hi
>  How to insert and update datin hadoop? Could you please explain me...
>
> Thanks
>  Prabakara Krishnan
>
>
>
>
> --
> Nitin Pawar
>
>
>
>