http://www.moosefs.com/ Open source, has some features that might be convenient for our data distribution, including maintaining multiple replicas. Scalability is my main concern, they seem to be talking about "few node" scale (though it is used up to 2 PB in production...) Anyway, have a look, this is probably most useful place to start: http://robo.moosefs.com/support/moosefs-users-manual.pdf The creators of mooseFS are from Poland and contacted me, so getting our questions answered will be very easy. Let me know what you think... Jacek ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1