<s>
Gfarm	B-Application
file	I-Application
system	I-Application
is	O
an	O
open-source	B-Application
distributed	B-Protocol
file	I-Protocol
system	I-Protocol
,	O
generally	O
used	O
for	O
large-scale	O
cluster	B-Architecture
computing	I-Architecture
and	O
wide-area	O
data	B-Application
sharing	I-Application
,	O
and	O
provides	O
features	O
to	O
manage	O
replica	O
location	O
explicitly	O
.	O
</s>
<s>
Grid	O
Datafarm	O
is	O
a	O
petascale	B-General_Concept
data-intensive	B-Operating_System
computing	I-Operating_System
project	O
initiated	O
in	O
Japan	O
.	O
</s>
