I am a newbie towards this tool and I want to know what exactly Hadoop is ?
Is it comparable to an IR library like Lucene or products like Solr. Also, is there any difference/relation between the two of them.
Oh, by IR, I meant Information Retrieval. Lucene provides the search capability which is used in search engines like nutch, but as Lucene provides searching and indexing capability, there are different tools that are built on top of it (Apache Solr or Hibernate Search).
Does Hadoop performs the same/similar functionality ?
The official documentation yielded me with confusing results, so I wanted clarification on basically how I can use this technology on a non-clustered environment.