Jay, We used to carry (and formerly, use) an InMemoryFileSystem implementation (its still around as deprecated in the maintenance 1.x release line: http://hadoop.apache.org/docs/stable/api/org/apache/hadoop/fs/InMemoryFileSystem.html).
The interface for writing FileSystems is indeed decoupled from "any real world filesystem" so let your imagination run wild. On Tue, Oct 30, 2012 at 9:16 PM, Jay Vyas <jayunit...@gmail.com> wrote: > what are the minimal requirements to implement the filesystem interface for > hdfs? > > I was thinking it might be cool to directly implement a 100% memory > filesystem, just for the hell of it - for fast unit tests, that simulated > lookups and stuff. > > So - if the interface is abstract and decoupled enough from any real world > filesystem, i think this could definetly work. > > -- > Jay Vyas > http://jayunit100.blogspot.com -- Harsh J