PROS: Excellent way to utilize powerful MapReduce and distributed file functions to process excessively large collections of data, Is open source to use on your own hardware clusters, Can be utilized through popular cloud platforms like Microsoft Azure and Amazon EC2
CONS: Not for the layman, should have some technical expertise in order to manage and utilize, Based on Linux, not for all users
CKAN is an open-source DMS (data management system) for powering data hubs and data portals. CKAN makes it easy to publish, share and use data. It powers datahub.io, catalog.data.gov and data.gov.uk among many other sites.