... 314 Astronomical Data Analysis Software and Systems XIII, eds. F. Ochsenbein, M. Allen, & D. Egret (San Francisco: ASP), 66 . ... Central to leveraging the cost benefits of a distributed storage system is the relationship between the base cost of a host platform and the point at which it becomes impractical to add additional low cost local storage. ... This is a simple and effective method but also costly, the storage system must be essentially twice the size of the data set. ...