<s>
The	O
DCE	B-Protocol
Distributed	I-Protocol
File	I-Protocol
System	I-Protocol
(	O
DCE/DFS	O
)	O
is	O
the	O
remote	O
file	O
access	O
protocol	O
used	O
with	O
the	O
Distributed	B-Operating_System
Computing	I-Operating_System
Environment	I-Operating_System
.	O
</s>
<s>
It	O
was	O
a	O
variant	O
of	O
Andrew	B-Application
File	I-Application
System	I-Application
(	O
AFS	O
)	O
,	O
based	O
on	O
the	O
AFS	O
Version	O
3.0	O
protocol	O
that	O
was	O
developed	O
commercially	O
by	O
Transarc	O
Corporation	O
.	O
</s>
<s>
AFS	O
Version	O
3.0	O
was	O
in	O
turn	O
based	O
on	O
the	O
AFS	O
Version	O
2.0	O
protocol	O
(	O
also	O
used	O
by	O
the	O
Coda	B-Application
disconnected	O
file	O
system	O
)	O
originally	O
developed	O
at	O
Carnegie	O
Mellon	O
University	O
.	O
</s>
<s>
DCE/DFS	O
also	O
divorced	O
the	O
concept	O
of	O
logical	O
units	O
of	O
management	O
(	O
Filesets	B-General_Concept
)	O
from	O
the	O
underlying	O
volume	O
on	O
which	O
the	O
fileset	B-General_Concept
was	O
stored	O
.	O
</s>
<s>
In	O
doing	O
this	O
it	O
allowed	O
administrative	O
control	O
of	O
the	O
location	O
for	O
the	O
fileset	B-General_Concept
in	O
a	O
manner	O
that	O
was	O
transparent	O
to	O
the	O
end	O
user	O
.	O
</s>
<s>
To	O
support	O
this	O
and	O
other	O
advanced	O
DCE/DFS	O
features	O
,	O
a	O
local	O
journaling	O
file	O
system	O
(	O
DCE/LFS	O
also	O
known	O
as	O
Episode	B-Application
)	O
was	O
developed	O
to	O
provide	O
the	O
full	O
range	O
of	O
support	O
options	O
.	O
</s>
<s>
The	O
DCE	B-Protocol
Distributed	I-Protocol
File	I-Protocol
System	I-Protocol
(	O
DFS	O
)	O
was	O
adopted	O
by	O
the	O
Open	B-Application
Software	I-Application
Foundation	I-Application
in	O
1989	O
as	O
part	O
of	O
their	O
Distributed	B-Operating_System
Computing	I-Operating_System
Environment	I-Operating_System
.	O
</s>
