<s>
Episode	O
is	O
a	O
POSIX	O
compliant	O
file	B-Application
system	I-Application
most	O
commonly	O
known	O
for	O
its	O
use	O
in	O
DCE/DFS	B-Protocol
file	O
servers	O
.	O
</s>
<s>
It	O
used	O
a	O
variety	O
of	O
methods	O
to	O
achieve	O
these	O
goals	O
,	O
one	O
of	O
which	O
was	O
its	O
use	O
of	O
metadata	O
logging	O
,	O
designed	O
to	O
enhance	O
the	O
file	B-Application
system	I-Application
's	O
performance	O
.	O
</s>
<s>
The	O
Episode	O
file	B-Application
system	I-Application
is	O
the	O
basis	O
for	O
the	O
IBM	B-Application
z/OS	I-Application
POSIX-compatible	O
file	B-Application
system	I-Application
called	O
zFS	B-Application
.	O
</s>
