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

Official documentation : http://dmc.web.cern.ch/

Differents file systems are supported by a collections of GFAL 2.0's plugins, this is a non complete list :

- LFC ( Logical File catalog) with lfn:// url
- SRM ( Storage Resource Manager) with  srm://
- RFIO ( remote file I/O) with rfio://
- DCAP ( remote ftp for Dcache ) with gsidcap://
- HTTP/Webdav  with cluster, third party copy and client side credential support.