The Grid File Access Library 2.0 that offers a POSIX interface to the distributed files system supported by WLCG.

Official documentation : https://svnweb.cern.ch/trac/lcgutil/wiki/gfal2

gfalFS provides a solution to mount any distributed file system managed \
by GFAL 2.0 permitting easy interactions with a large set of distributed file systems. 
