<s>
This	O
is	O
an	O
incomplete	O
list	O
of	O
log-structured	B-Application
file	I-Application
system	I-Application
implementations	O
.	O
</s>
<s>
James	O
T	O
,	O
Brady	O
while	O
in	O
IBM	O
Poughkeepsie	O
Lab	O
conceived	O
a	O
log	O
structured	O
paging	O
file	O
system	O
in	O
1979	O
which	O
was	O
implemented	O
in	O
MVS	B-Application
SP2	O
in	O
1980	O
.	O
</s>
<s>
John	O
K	O
.	O
Ousterhout	O
and	O
Mendel	O
Rosenblum	O
implemented	O
the	O
first	O
log-structured	B-Application
file	I-Application
system	I-Application
for	O
the	O
Sprite	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
in	O
1992	O
.	O
</s>
<s>
BSD-LFS	B-Application
,	O
an	O
implementation	O
by	O
Margo	O
Seltzer	O
was	O
added	O
to	O
4.4BSD	O
,	O
and	O
was	O
later	O
ported	O
to	O
386BSD	B-Operating_System
.	O
</s>
<s>
It	O
was	O
removed	O
from	O
FreeBSD	O
and	O
OpenBSD	O
,	O
but	O
still	O
lives	O
on	O
in	O
NetBSD	B-Device
.	O
</s>
<s>
Plan	B-Operating_System
9	I-Operating_System
's	O
Fossil	B-Application
file	I-Application
system	I-Application
is	O
also	O
log-structured	O
and	O
supports	O
snapshots	O
.	O
</s>
<s>
NILFS	B-Application
is	O
a	O
log-structured	B-Application
file	I-Application
system	I-Application
implementation	O
for	O
Linux	B-Application
by	O
NTT/Verio	O
which	O
supports	O
snapshots	O
.	O
</s>
<s>
LinLogFS	O
(	O
formerly	O
dtfs	O
)	O
and	O
LFS	O
are	O
log-structured	B-Application
file	I-Application
system	I-Application
implementations	O
for	O
Linux	B-Application
.	O
</s>
<s>
The	O
latter	O
was	O
part	O
of	O
Google	B-Application
Summer	I-Application
of	I-Application
Code	I-Application
2005	I-Application
.	O
</s>
<s>
LFS	O
is	O
another	O
log-structured	B-Application
file	I-Application
system	I-Application
for	O
Linux	B-Application
developed	O
by	O
Charles	O
University	O
,	O
Prague	O
.	O
</s>
<s>
Write	B-Application
Anywhere	I-Application
File	I-Application
Layout	I-Application
(	O
WAFL	O
)	O
by	O
NetApp	O
is	O
a	O
file	O
layout	O
that	O
supports	O
large	O
,	O
high-performance	O
RAID	O
arrays	O
,	O
quick	O
restarts	O
without	O
lengthy	O
consistency	O
checks	O
in	O
the	O
event	O
of	O
a	O
crash	O
or	O
power	O
failure	O
,	O
and	O
growing	O
the	O
filesystems	O
size	O
quickly	O
.	O
</s>
<s>
Built	O
using	O
log-structured	B-Application
file	I-Application
system	I-Application
concept	O
,	O
snapshots	O
and	O
off-line	O
data	B-General_Concept
deduplication	I-General_Concept
.	O
</s>
<s>
LSFS	B-Application
is	O
a	O
log-structured	B-Application
file	I-Application
system	I-Application
with	O
writable	O
snapshots	O
and	O
inline	O
data	B-General_Concept
deduplication	I-General_Concept
created	O
by	O
StarWind	O
Software	O
.	O
</s>
<s>
Cache	O
Accelerated	O
Sequential	O
Layout	O
(	O
CASL	O
)	O
is	O
a	O
proprietary	O
log-structured	B-Application
filesystem	I-Application
developed	O
by	O
Nimble	O
Storage	O
that	O
uses	O
Solid	O
State	O
Devices	O
to	O
cache	O
traditional	O
hard	O
drives	O
.	O
</s>
<s>
ObjectiveFS	B-Application
is	O
a	O
log-structured	O
FUSE	O
filesystem	O
that	O
uses	O
cloud	O
object	O
stores	O
(	O
e.g.	O
</s>
<s>
NOVA	B-Application
for	O
byte-addressable	O
persistent	B-Library
memory	I-Library
(	O
for	O
example	O
non-volatile	B-Device
dual	I-Device
in-line	I-Device
memory	I-Device
module	I-Device
(	O
NVDIMM	B-Device
)	O
and	O
3D	B-Device
XPoint	I-Device
)	O
for	O
Linux	B-Application
developed	O
at	O
the	O
University	O
of	O
California	O
,	O
San	O
Diego	O
,	O
US	O
.	O
</s>
<s>
Spiralog	O
was	O
a	O
log-structured	B-Application
filesystem	I-Application
created	O
by	O
Digital	O
Equipment	O
Corporation	O
for	O
the	O
OpenVMS	B-Operating_System
operating	O
system	O
.	O
</s>
<s>
Some	O
kinds	O
of	O
storage	O
media	O
,	O
such	O
as	O
flash	B-Device
memory	I-Device
and	O
CD-RW	O
,	O
slowly	O
degrade	O
as	O
they	O
are	O
written	O
to	O
and	O
have	O
a	O
limited	O
number	O
of	O
erase/write	O
cycles	O
at	O
any	O
one	O
location	O
.	O
</s>
<s>
Log-structured	B-Application
file	I-Application
systems	I-Application
are	O
sometimes	O
used	O
on	O
these	O
media	O
because	O
they	O
make	O
fewer	O
in-place	O
writes	O
and	O
thus	O
prolong	O
the	O
life	O
of	O
the	O
device	O
by	O
wear	B-Application
leveling	I-Application
.	O
</s>
<s>
UDF	O
is	O
a	O
file	O
system	O
commonly	O
used	O
on	O
optical	B-Device
discs	I-Device
.	O
</s>
<s>
JFFS	B-Application
and	O
its	O
successor	O
JFFS2	B-Application
are	O
simple	O
Linux	B-Application
file	O
systems	O
intended	O
for	O
raw	O
flash-based	O
devices	O
.	O
</s>
<s>
UBIFS	B-Application
is	O
a	O
filesystem	O
for	O
raw	O
NAND	O
flash	B-Device
media	I-Device
and	O
also	O
intended	O
to	O
replace	O
JFFS2	B-Application
.	O
</s>
<s>
LogFS	B-Application
is	O
a	O
scalable	O
flash	O
filesystem	O
for	O
Linux	B-Application
that	O
works	O
on	O
both	O
raw	O
flash	B-Device
media	I-Device
and	O
block	O
devices	O
,	O
intended	O
to	O
replace	O
JFFS2	B-Application
.	O
</s>
<s>
YAFFS	B-Application
is	O
a	O
raw	O
NAND	O
flash-specific	O
file	O
system	O
for	O
many	O
operating	O
systems	O
(	O
including	O
Linux	B-Application
)	O
.	O
</s>
<s>
F2FS	B-Application
is	O
a	O
new	O
file	O
system	O
designed	O
for	O
the	O
NAND	O
flash	O
memory-based	O
storage	O
devices	O
on	O
Linux	B-Application
.	O
</s>
