hadoop-mapreduce-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ted Yu <yuzhih...@gmail.com>
Subject Re: External db
Date Sun, 15 Dec 2013 15:03:58 GMT
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 <woolfel@gmail.com> 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 <alajangikishore@gmail.com>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
>
>
>

Mime
View raw message