avitorovic/squall — pull request #7 by yannisklonatos (2012-06-16 07:56:58+00:00)
Title: Secondary storage refactored. 

Three different entities in the new design of secondary storage:
1) In memory data stores which store a percentage of the data set in-memory
2) Memory Manager which controls the memory footprint these stores can grow to
3) Storage Manager which controls access to the secondary storage (HDDs, SSDs etc)

Note: Aggregation have a minor bug i detected when working with secondary storage. Will fix in the next pull request.