How do organisations use Hadoop and associated technologies ?

Hi, I am new to Hadoop and would like to understand how exactly are Hadoop and its associated technologies (like Cassandra, Hive, Pig,etc..) used to achieve a business goal ? So lets say an organization has Hadoop and Cassandra or MongoDB and everything up and running. Then what ? What do you

Re: How do organisations use Hadoop and associated technologies ?

I found use cases but I am looking for info at a lower level - implementation of retrieval and presentation. For example in these cases - http://www.slideshare.net/McK_CMSOForum/big-data-and-advanced-analytics-16-use-cases I want to know what technology stack would be used to retrieve,