<s>
GridFTP	B-Application
is	O
an	O
extension	O
of	O
the	O
File	B-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
(	O
FTP	O
)	O
for	O
grid	B-Architecture
computing	I-Architecture
.	O
</s>
<s>
The	O
protocol	O
was	O
defined	O
within	O
the	O
GridFTP	B-Application
working	O
group	O
of	O
the	O
Open	O
Grid	O
Forum	O
.	O
</s>
<s>
The	O
aim	O
of	O
GridFTP	B-Application
is	O
to	O
provide	O
a	O
more	O
reliable	O
and	O
high	O
performance	O
file	O
transfer	O
,	O
for	O
example	O
to	O
enable	O
the	O
transmission	O
of	O
very	O
large	O
files	O
.	O
</s>
<s>
GridFTP	B-Application
is	O
used	O
extensively	O
within	O
large	O
science	O
projects	O
such	O
as	O
the	O
Large	O
Hadron	O
Collider	O
and	O
by	O
many	O
supercomputer	O
centers	O
and	O
other	O
scientific	O
facilities	O
.	O
</s>
<s>
GridFTP	B-Application
also	O
addresses	O
the	O
problem	O
of	O
incompatibility	O
between	O
storage	O
and	O
access	O
systems	O
.	O
</s>
<s>
GridFTP	B-Application
provides	O
a	O
uniform	O
way	O
of	O
accessing	O
the	O
data	O
,	O
encompassing	O
functions	O
from	O
all	O
the	O
different	O
modes	O
of	O
access	O
,	O
building	O
on	O
and	O
extending	O
the	O
universally	O
accepted	O
FTP	O
standard	O
.	O
</s>
<s>
Numerous	O
GridFTP	B-Application
clients	O
have	O
been	O
developed	O
.	O
</s>
<s>
GridFTP	B-Application
integrates	O
with	O
the	O
Grid	B-Operating_System
Security	I-Operating_System
Infrastructure	I-Operating_System
,	O
which	O
provides	O
authentication	O
and	O
encryption	O
to	O
file	O
transfers	O
,	O
with	O
user-specified	O
levels	O
of	O
confidentiality	O
and	O
data	O
integrity	O
,	O
also	O
for	O
cross-server	O
transfers	O
(	O
what	O
FTP	O
calls	O
the	O
File	B-Protocol
eXchange	I-Protocol
Protocol	I-Protocol
,	O
FXP	O
)	O
.	O
</s>
<s>
GridFTP	B-Application
achieves	O
much	O
greater	O
use	O
of	O
bandwidth	O
than	O
conventional	O
data	O
stream	O
technology	O
by	O
using	O
multiple	O
simultaneous	O
TCP	O
streams	O
.	O
</s>
<s>
GridFTP	B-Application
allows	O
a	O
subset	O
of	O
a	O
file	O
to	O
be	O
sent	O
.	O
</s>
<s>
GridFTP	B-Application
provides	O
a	O
fault	O
tolerant	O
implementation	O
of	O
FTP	O
,	O
to	O
handle	O
network	O
unavailability	O
and	O
server	O
problems	O
.	O
</s>
<s>
GridFTP	B-Application
allows	O
automatic	O
(	O
or	O
manual	O
)	O
negotiation	O
of	O
these	O
settings	O
to	O
provide	O
optimal	O
transfer	O
speeds	O
and	O
reliability	O
(	O
optimal	O
settings	O
are	O
likely	O
to	O
be	O
different	O
with	O
large	O
files	O
and	O
for	O
large	O
groups	O
of	O
files	O
)	O
.	O
</s>
