<s>
Coda	B-Application
is	O
a	O
distributed	B-Protocol
file	I-Protocol
system	I-Protocol
developed	O
as	O
a	O
research	O
project	O
at	O
Carnegie	O
Mellon	O
University	O
since	O
1987	O
under	O
the	O
direction	O
of	O
Mahadev	O
Satyanarayanan	O
.	O
</s>
<s>
It	O
descended	O
directly	O
from	O
an	O
older	O
version	O
of	O
Andrew	B-Application
File	I-Application
System	I-Application
(	O
AFS-2	O
)	O
and	O
offers	O
many	O
similar	O
features	O
.	O
</s>
<s>
The	O
InterMezzo	B-Application
file	O
system	O
was	O
inspired	O
by	O
Coda	B-Application
.	O
</s>
<s>
Coda	B-Application
has	O
many	O
features	O
that	O
are	O
desirable	O
for	O
network	O
file	O
systems	O
,	O
and	O
several	O
features	O
not	O
found	O
elsewhere	O
.	O
</s>
<s>
Coda	B-Application
uses	O
a	O
local	O
cache	O
to	O
provide	O
access	O
to	O
server	O
data	O
when	O
the	O
network	O
connection	O
is	O
lost	O
.	O
</s>
<s>
If	O
the	O
network	O
connection	O
is	O
lost	O
,	O
the	O
Coda	B-Application
client	O
's	O
local	O
cache	O
serves	O
data	O
from	O
this	O
cache	O
and	O
logs	O
all	O
updates	O
.	O
</s>
<s>
Also	O
different	O
from	O
AFS	O
is	O
Coda	B-Application
's	O
data	O
replication	O
method	O
.	O
</s>
<s>
Coda	B-Application
allows	O
all	O
servers	O
to	O
receive	O
updates	O
,	O
allowing	O
for	O
a	O
greater	O
availability	O
of	O
server	O
data	O
in	O
the	O
event	O
of	O
network	O
partitions	O
,	O
a	O
case	O
which	O
AFS	O
cannot	O
handle	O
.	O
</s>
<s>
Coda	B-Application
has	O
extensive	O
repair	O
tools	O
,	O
both	O
manual	O
and	O
automated	O
,	O
to	O
handle	O
and	O
repair	O
both	O
types	O
of	O
conflicts	O
.	O
</s>
<s>
Coda	B-Application
has	O
been	O
developed	O
on	O
Linux	B-Application
and	O
support	O
for	O
it	O
appeared	O
in	O
the	O
2.1	O
Linux	B-Operating_System
kernel	I-Operating_System
series	O
.	O
</s>
<s>
It	O
has	O
also	O
been	O
ported	O
to	O
FreeBSD	B-Operating_System
.	O
</s>
<s>
Efforts	O
have	O
been	O
made	O
to	O
port	O
Coda	B-Application
to	O
Microsoft	B-Application
Windows	I-Application
,	O
from	O
the	O
Windows	O
95/Windows	O
98	O
era	O
,	O
Windows	B-Device
NT	I-Device
to	O
Windows	B-Application
XP	I-Application
,	O
by	O
means	O
of	O
open-source	O
projects	O
like	O
the	O
DJGCC	B-Application
DOS	I-Application
C	I-Application
Compiler	I-Application
and	O
Cygwin	B-Language
.	O
</s>
