<s>
Filesystem	B-Application
in	I-Application
Userspace	I-Application
(	O
FUSE	B-Application
)	O
is	O
a	O
software	O
interface	O
for	O
Unix	B-Application
and	O
Unix-like	B-Operating_System
computer	B-General_Concept
operating	I-General_Concept
systems	I-General_Concept
that	O
lets	O
non-privileged	O
users	O
create	O
their	O
own	O
file	B-Application
systems	I-Application
without	O
editing	O
kernel	B-Operating_System
code	O
.	O
</s>
<s>
This	O
is	O
achieved	O
by	O
running	O
file	B-Application
system	I-Application
code	O
in	O
user	B-Operating_System
space	I-Operating_System
while	O
the	O
FUSE	B-Application
module	O
provides	O
only	O
a	O
bridge	O
to	O
the	O
actual	O
kernel	B-Operating_System
interfaces	O
.	O
</s>
<s>
FUSE	B-Application
is	O
available	O
for	O
Linux	B-Application
,	O
FreeBSD	B-Operating_System
,	O
OpenBSD	B-Operating_System
,	O
NetBSD	B-Device
(	O
as	O
puffs	B-Application
)	O
,	O
OpenSolaris	B-Operating_System
,	O
Minix	B-Application
3	I-Application
,	O
macOS	B-Application
,	O
and	O
Windows	B-Application
.	O
</s>
<s>
FUSE	B-Application
is	O
free	B-Application
software	I-Application
originally	O
released	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
and	O
the	O
GNU	B-Application
Lesser	I-Application
General	I-Application
Public	I-Application
License	I-Application
.	O
</s>
<s>
The	O
FUSE	B-Application
system	O
was	O
originally	O
part	O
of	O
AVFS	B-Application
(	O
A	O
Virtual	B-Application
Filesystem	I-Application
)	O
,	O
a	O
filesystem	B-Application
implementation	O
heavily	O
influenced	O
by	O
the	O
translator	O
concept	O
of	O
the	O
GNU	B-Application
Hurd	I-Application
.	O
</s>
<s>
It	O
superseded	O
Linux	B-Application
Userland	I-Application
Filesystem	I-Application
,	O
and	O
provided	O
a	O
translational	O
interface	O
using	O
in	O
libfuse1	O
.	O
</s>
<s>
FUSE	B-Application
was	O
originally	O
released	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
and	O
the	O
GNU	B-Application
Lesser	I-Application
General	I-Application
Public	I-Application
License	I-Application
,	O
later	O
also	O
reimplemented	O
as	O
part	O
of	O
the	O
FreeBSD	B-Operating_System
base	O
system	O
and	O
released	O
under	O
the	O
terms	O
of	O
Simplified	O
BSD	O
license	O
.	O
</s>
<s>
An	O
ISC-licensed	O
re-implementation	O
by	O
Sylvestre	O
Gallon	O
was	O
released	O
in	O
March	O
2013	O
,	O
and	O
incorporated	O
into	O
OpenBSD	B-Operating_System
in	O
June	O
2013	O
.	O
</s>
<s>
FUSE	B-Application
was	O
merged	O
into	O
the	O
mainstream	O
Linux	B-Operating_System
kernel	I-Operating_System
tree	O
in	O
kernel	B-Operating_System
version	O
2.6.14	O
.	O
</s>
<s>
The	O
userspace	B-Operating_System
side	O
of	O
FUSE	B-Application
,	O
the	O
library	O
,	O
generally	O
followed	O
the	O
pace	O
of	O
Linux	B-Operating_System
kernel	I-Operating_System
development	O
while	O
maintaining	O
"	O
best	O
effort	O
"	O
compatibility	O
with	O
BSD	O
descendants	O
.	O
</s>
<s>
This	O
is	O
possible	O
because	O
the	O
kernel	B-Operating_System
FUSE	B-Application
reports	O
its	O
own	O
"	O
feature	O
levels	O
"	O
,	O
or	O
versions	O
.	O
</s>
<s>
The	O
exception	O
is	O
the	O
FUSE	B-Application
fork	O
for	O
macOS	B-Application
,	O
OSXFUSE	O
,	O
which	O
has	O
too	O
many	O
differences	O
for	O
sharing	O
a	O
library	O
.	O
</s>
<s>
As	O
the	O
kernel-userspace	O
protocol	O
of	O
FUSE	B-Application
is	O
versioned	O
and	O
public	O
,	O
a	O
programmer	O
can	O
choose	O
to	O
use	O
a	O
different	O
piece	O
of	O
code	O
in	O
place	O
of	O
and	O
still	O
communicate	O
with	O
the	O
kernel	B-Operating_System
's	O
FUSE	B-Application
facilities	O
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
and	O
its	O
many	O
ports	O
provide	O
a	O
portable	O
high-level	O
interface	O
that	O
may	O
be	O
implemented	O
on	O
a	O
system	O
without	O
a	O
"	O
FUSE	B-Application
"	O
facility	O
.	O
</s>
<s>
To	O
implement	O
a	O
new	O
file	B-Application
system	I-Application
,	O
a	O
handler	O
program	O
linked	O
to	O
the	O
supplied	O
libfuse	O
library	O
needs	O
to	O
be	O
written	O
.	O
</s>
<s>
The	O
main	O
purpose	O
of	O
this	O
program	O
is	O
to	O
specify	O
how	O
the	O
file	B-Application
system	I-Application
is	O
to	O
respond	O
to	O
read/write/stat	O
requests	O
.	O
</s>
<s>
The	O
program	O
is	O
also	O
used	O
to	O
mount	B-Application
the	O
new	O
file	B-Application
system	I-Application
.	O
</s>
<s>
At	O
the	O
time	O
the	O
file	B-Application
system	I-Application
is	O
mounted	O
,	O
the	O
handler	O
is	O
registered	O
with	O
the	O
kernel	B-Operating_System
.	O
</s>
<s>
If	O
a	O
user	O
now	O
issues	O
read/write/stat	O
requests	O
for	O
this	O
newly	O
mounted	O
file	B-Application
system	I-Application
,	O
the	O
kernel	B-Operating_System
forwards	O
these	O
IO-requests	O
to	O
the	O
handler	O
and	O
then	O
sends	O
the	O
handler	O
's	O
response	O
back	O
to	O
the	O
user	O
.	O
</s>
<s>
FUSE	B-Application
is	O
particularly	O
useful	O
for	O
writing	O
virtual	B-Application
file	I-Application
systems	I-Application
.	O
</s>
<s>
Unlike	O
traditional	O
file	B-Application
systems	I-Application
that	O
essentially	O
work	O
with	O
data	O
on	O
mass	O
storage	O
,	O
virtual	B-Application
filesystems	I-Application
do	O
n't	O
actually	O
store	O
data	O
themselves	O
.	O
</s>
<s>
They	O
act	O
as	O
a	O
view	O
or	O
translation	O
of	O
an	O
existing	O
file	B-Application
system	I-Application
or	O
storage	O
device	O
.	O
</s>
<s>
In	O
principle	O
,	O
any	O
resource	O
available	O
to	O
a	O
FUSE	B-Application
implementation	O
can	O
be	O
exported	O
as	O
a	O
file	B-Application
system	I-Application
.	O
</s>
<s>
Conventional	O
on-disk	O
file	O
systems	O
can	O
be	O
implemented	O
in	O
user	B-Operating_System
space	I-Operating_System
with	O
FUSE	B-Application
,	O
e.g.	O
</s>
<s>
Linear	B-Device
Tape	I-Device
File	I-Device
System	I-Device
:	O
Allows	O
files	O
stored	O
on	O
magnetic	O
tape	O
to	O
be	O
accessed	O
in	O
a	O
similar	O
fashion	O
to	O
those	O
on	O
disk	O
or	O
removable	O
flash	O
drives	O
.	O
</s>
<s>
NTFS-3G	B-Application
and	O
Captive	B-Application
NTFS	I-Application
,	O
allowing	O
access	O
to	O
NTFS	B-Application
filesystems	B-Application
.	O
</s>
<s>
:	O
retro-fuse	O
is	O
a	O
user-space	B-Operating_System
filesystem	B-Application
that	O
provides	O
a	O
way	O
to	O
mount	B-Application
filesystems	B-Application
created	O
by	O
ancient	O
Unix	B-Application
systems	I-Application
on	O
modern	O
OSes	O
.	O
</s>
<s>
The	O
current	O
version	O
of	O
retro-fuse	O
supports	O
mounting	B-Application
filesystems	B-Application
created	O
by	O
Fifth	O
,	O
Sixth	O
and	O
Seventh	O
Edition	O
of	O
Research	O
Unix	B-Application
from	O
BTL	O
,	O
as	O
well	O
as	O
2.9BSD	O
and	O
2.11BSD	O
based	O
systems	O
.	O
</s>
<s>
FUSE	B-Application
filesystems	B-Application
can	O
create	O
a	O
view	O
of	O
an	O
underlying	O
file	B-Application
system	I-Application
,	O
transforming	O
the	O
files	O
in	O
some	O
way	O
.	O
</s>
<s>
FUSE	B-Application
filesystems	B-Application
can	O
expose	O
the	O
contents	O
of	O
archives	O
or	O
backup	O
sets	O
without	O
having	O
to	O
first	O
extract	O
them	O
.	O
</s>
<s>
Borg	O
(	O
backup	O
software	O
)	O
:	O
Deduplicating	O
backup	O
program	O
that	O
allows	O
backup	O
archives	O
to	O
be	O
mounted	O
as	O
FUSE	B-Application
filesystems	B-Application
.	O
</s>
<s>
A	O
file	B-Application
system	I-Application
for	O
Spectrum	O
Protect	O
,	O
designed	O
to	O
mount	B-Application
the	O
backup	O
server	O
filespace	O
anywhere	O
on	O
your	O
server	O
,	O
and	O
use	O
the	O
features	O
included	O
from	O
the	O
backup	O
server	O
(	O
encryption	O
,	O
de-duplication	O
,	O
compression	O
,	O
filtering	O
etc	O
)	O
.	O
</s>
<s>
This	O
is	O
a	O
WORM	B-Device
file	B-Application
system	I-Application
.	O
</s>
<s>
:	O
A	O
distributed	O
read-only	O
software	O
distribution	O
system	O
,	O
implemented	O
as	O
a	O
POSIX	O
filesystem	B-Application
in	O
user	B-Operating_System
space	I-Operating_System
(	O
FUSE	B-Application
)	O
using	O
HTTP	O
transport	O
,	O
to	O
deliver	O
software	O
in	O
a	O
fast	O
and	O
reliable	O
fashion	O
at	O
global	O
scale	O
.	O
</s>
<s>
GlusterFS	B-Application
:	O
Clustered	O
Distributed	O
Filesystem	B-Application
having	O
ability	O
to	O
scale	O
up	O
to	O
several	O
petabytes	O
.	O
</s>
<s>
:	O
A	O
FUSE	B-Application
filesystem	B-Application
that	O
allows	O
access	O
to	O
Amazon	O
S3/Microsoft	O
Azure	O
storage	O
with	O
an	O
emphasis	O
on	O
performance	O
.	O
</s>
<s>
is	O
a	O
FUSE	B-Application
filesystem	B-Application
for	O
Google	O
Drive	O
,	O
written	O
in	O
OCaml	O
.	O
</s>
<s>
It	O
lets	O
you	O
mount	B-Application
your	O
Google	O
Drive	O
on	O
Linux	B-Application
.	O
</s>
<s>
IPFS	O
:	O
A	O
peer-to-peer	O
distributed	O
file	B-Application
system	I-Application
that	O
seeks	O
to	O
connect	O
all	O
computing	O
devices	O
with	O
the	O
same	O
system	O
of	O
files	O
.	O
</s>
<s>
JuiceFS	O
:	O
A	O
distributed	O
POSIX	O
file	B-Application
system	I-Application
built	O
on	O
top	O
of	O
Redis	O
and	O
S3	O
.	O
</s>
<s>
KBFS	B-Application
:	O
A	O
distributed	O
filesystem	B-Application
with	O
end-to-end	O
encryption	O
and	O
a	O
global	O
namespace	O
based	O
on	O
Keybase.io	B-Application
service	O
that	O
uses	O
FUSE	B-Application
to	O
create	O
cryptographically	O
secure	O
file	O
mounts	O
.	O
</s>
<s>
Lustre	B-Application
Cluster	O
filesystem	B-Application
will	O
use	O
FUSE	B-Application
to	O
allow	O
it	O
to	O
run	O
in	O
userspace	B-Operating_System
,	O
so	O
that	O
a	O
FreeBSD	B-Operating_System
port	O
is	O
possible	O
.	O
</s>
<s>
However	O
,	O
the	O
ZFS-Linux	O
port	O
of	O
Lustre	B-Application
will	O
be	O
running	O
ZFS	B-Application
's	O
DMU	O
(	O
Data	O
Management	O
Unit	O
)	O
in	O
userspace	B-Operating_System
.	O
</s>
<s>
MinFS	O
:	O
MinFS	O
is	O
a	O
fuse	B-Application
driver	B-Application
for	O
Amazon	B-General_Concept
S3	I-General_Concept
compatible	O
object	O
storage	O
server	O
.	O
</s>
<s>
MinFS	O
lets	O
you	O
mount	B-Application
a	O
remote	O
bucket	O
(	O
from	O
a	O
S3	O
compatible	O
object	O
store	O
)	O
,	O
as	O
if	O
it	O
were	O
a	O
local	O
directory	O
.	O
</s>
<s>
MooseFS	B-Application
:	O
An	O
open	O
source	O
distributed	O
fault-tolerant	O
file	B-Application
system	I-Application
available	O
on	O
every	O
OS	O
with	O
FUSE	B-Application
implementation	O
(	O
Linux	B-Application
,	O
FreeBSD	B-Operating_System
,	O
NetBSD	B-Device
,	O
OpenSolaris	B-Operating_System
,	O
OS	O
X	O
)	O
,	O
able	O
to	O
store	O
petabytes	O
of	O
data	O
spread	O
over	O
several	O
servers	O
visible	O
as	O
one	O
resource	O
.	O
</s>
<s>
:	O
A	O
commercial	O
Linux	B-Application
file	B-Application
system	I-Application
that	O
combines	O
Block	O
,	O
File	O
,	O
and	O
S3	O
compatible	O
Cloud	O
&	O
Object	O
storage	O
into	O
a	O
single	O
pool	O
of	O
POSIX	O
compatible	O
storage	O
.	O
</s>
<s>
Rclone	B-General_Concept
can	O
mount	B-Application
a	O
variety	O
of	O
remote	O
/	O
cloud	O
storage	O
with	O
FUSE	B-Application
.	O
</s>
<s>
:	O
Gives	O
the	O
ability	O
to	O
mount	B-Application
an	O
S3	O
bucket	O
as	O
if	O
it	O
were	O
a	O
local	O
file	B-Application
system	I-Application
.	O
</s>
<s>
Sector	B-General_Concept
File	I-General_Concept
System	I-General_Concept
:	O
Sector	O
is	O
a	O
distributed	O
file	B-Application
system	I-Application
designed	O
for	O
large	O
amount	O
of	O
commodity	O
computers	O
.	O
</s>
<s>
Sector	O
uses	O
FUSE	B-Application
to	O
provide	O
a	O
mountable	O
local	O
file	B-Application
system	I-Application
interface	O
.	O
</s>
<s>
SSHFS	B-Application
:	O
Provides	O
access	O
to	O
a	O
remote	O
filesystem	B-Application
through	O
SSH	B-Protocol
.	O
</s>
<s>
Transmit	B-Operating_System
:	O
A	O
commercial	O
FTP	O
client	O
that	O
also	O
adds	O
the	O
ability	O
to	O
mount	B-Application
WebDAV	B-Protocol
,	O
SFTP	O
,	O
FTP	O
and	O
Amazon	B-General_Concept
S3	I-General_Concept
servers	I-General_Concept
as	O
disks	O
in	O
Finder	O
,	O
via	O
MacFUSE	B-Application
.	O
</s>
<s>
Wuala	B-Application
:	O
Was	O
a	O
multi-platform	O
,	O
Java-based	O
fully	O
OS	O
integrated	O
distributed	O
file	B-Application
system	I-Application
.	O
</s>
<s>
Using	O
FUSE	B-Application
,	O
MacFUSE	B-Application
and	O
respectively	O
for	O
file	B-Application
system	I-Application
integration	O
,	O
in	O
addition	O
to	O
a	O
Java-based	O
app	O
accessible	O
from	O
any	O
Java-enabled	O
web	O
browser	O
(	O
service	O
discontinued	O
in	O
2015	O
)	O
.	O
</s>
<s>
:	O
A	O
remote	O
file	O
aggregating	O
filesystem	B-Application
with	O
transparent	O
CURL	O
access	O
to	O
distributed	O
files	O
.	O
</s>
<s>
It	O
uses	O
FUSE	B-Application
to	O
expose	O
the	O
vault	O
as	O
a	O
file	B-Application
system	I-Application
.	O
</s>
