Kishore: Some NoSQL from your initial post, such as mongodb, is not built on top of hdfs. See: http://www.ikanow.com/blog/02/15/how-well-does-mongodb-integrate-with-hadoop/
Cheers On Sun, Dec 15, 2013 at 5:42 AM, Peter Lin <[email protected]> wrote: > > you're question doesn't make any sense. Did you mean to ask > > What is the benefit of NoSql databases like Cassandra, HBase and MongoDB? > Isn't that like asking "why do we need SqlServer and Oracle when we have > NTFS?" > > The first thing is Nosql databases are generally grouped by 3 categories: > document (aka couchdb and mongodb), column (cassandra and hbase) and graph > (neo4j). > > There's a lot of talks and blogs out there, I would suggest spend a week > and read. Google is your friend. > > > On Sun, Dec 15, 2013 at 8:21 AM, Kishore <[email protected]>wrote: > >> Hi experts, >> >> What exactly needed the nosql database like Cassandra, hbase and mongodb >> when we have hdfs, ofcourse >> It supports oltp, are we storing the results from hdfs and reanalysing in >> nosql? >> >> Sent from my iPhone > > >
