<s>
CloudStore	B-Language
(	O
KFS	O
,	O
previously	O
Kosmosfs	O
)	O
was	O
Kosmix	O
's	O
C++	O
implementation	O
of	O
the	O
Google	B-Application
File	I-Application
System	I-Application
.	O
</s>
<s>
It	O
parallels	O
the	O
Hadoop	B-Application
project	O
,	O
which	O
is	O
implemented	O
in	O
the	O
Java	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
CloudStore	B-Language
supports	O
incremental	O
scalability	O
,	O
replication	O
,	O
checksumming	O
for	O
data	O
integrity	O
,	O
client	O
side	O
fail-over	O
and	O
access	O
from	O
C++	O
,	O
Java	B-Language
and	O
Python	O
.	O
</s>
<s>
There	O
is	O
a	O
FUSE	B-Application
module	O
so	O
that	O
the	O
file	O
system	O
can	O
be	O
mounted	O
on	O
Linux	B-Application
.	O
</s>
<s>
In	O
September	O
2007	O
Kosmix	O
published	O
Kosmosfs	O
as	O
open	B-Application
source	I-Application
.	O
</s>
<s>
The	O
Google	B-Protocol
Code	I-Protocol
page	O
for	O
Kosmosfs	O
now	O
points	O
to	O
the	O
Quantcast	B-Language
File	I-Language
System	I-Language
on	O
GitHub	B-Application
which	O
is	O
the	O
successor	O
to	O
KFS	O
.	O
</s>
<s>
A	O
former	O
project	O
on	O
SourceForge	B-Application
used	O
the	O
name	O
CloudStore	B-Language
in	O
2008	O
.	O
</s>
