How do "Big Data" technologies store unstructured data?
I have been reading about Big Data technologies off late and gathered that Big data is the need of the hour because of the growing size of data and RDBMS's restriction to store only structured data and not the unstructured data coming from Facebook, RFID readers etc.
Can anybody please throw some light as to how this unstructured data is stored? We know structured data is stored in the form of tables. What about this unstructured data?