<s>
The	O
Intel	O
Cache	B-Device
Acceleration	I-Device
Software	I-Device
(	O
CAS	O
)	O
is	O
a	O
computer	B-General_Concept
data	I-General_Concept
storage	I-General_Concept
product	O
for	O
solid-state	B-Device
drive	I-Device
(	O
SSD	B-Device
)	O
caching	O
.	O
</s>
<s>
CAS	O
manages	O
using	O
the	O
SSD	B-Device
storage	O
as	O
a	O
cache	O
layer	O
for	O
slower	O
storage	O
data	O
(	O
e.g.	O
</s>
<s>
A	O
cached	O
copy	O
of	O
recently	O
used	O
data	O
from	O
slower	O
storage	O
is	O
kept	O
in	O
faster	O
SSD	B-Device
storage	O
to	O
improve	O
I/O	O
performance	O
.	O
</s>
<s>
Versions	O
of	O
Intel	O
CAS	O
are	O
available	O
for	O
Windows	B-Application
Enterprise	O
,	O
Windows	B-Application
Workstation	O
,	O
and	O
Linux	B-Application
.	O
</s>
<s>
CAS	O
for	O
Windows	B-Application
is	O
an	O
application-aware	O
file-based	O
cache	O
,	O
which	O
can	O
be	O
tuned	O
by	O
system	O
administrators	O
.	O
</s>
<s>
Additionally	O
,	O
it	O
integrates	O
with	O
the	O
operating	O
system	O
's	O
buffer	B-General_Concept
cache	I-General_Concept
,	O
creating	O
a	O
multi-tier	O
cache	O
architecture	O
.	O
</s>
<s>
CAS	O
is	O
also	O
aware	O
of	O
some	O
virtualization	B-General_Concept
technologies	O
like	O
vMotion	O
,	O
maintaining	O
a	O
hot	O
SSD	B-Device
cache	O
during	O
a	O
VM	O
migration	O
.	O
</s>
<s>
CAS	O
works	O
with	O
the	O
enterprise-class	O
Intel	O
SSD	B-Device
products	O
,	O
such	O
as	O
the	O
DC	O
S3700	O
SATA	O
drives	O
and	O
the	O
DC	O
P3700	O
NVMe	O
PCI	O
Express	O
devices	O
.	O
</s>
<s>
Intel	O
CAS	O
for	O
Linux	B-Application
consists	O
of	O
a	O
GPL	O
'd	O
source	O
loadable	O
kernel	O
module	O
paired	O
with	O
a	O
closed	O
source	O
user-space	O
admin	O
configuration	O
tool	O
.	O
</s>
<s>
The	O
CAS	O
for	O
Linux	B-Application
version	O
supports	O
CentOS	O
,	O
Red	O
Hat	O
Enterprise	O
Linux	B-Application
and	O
SUSE	O
Linux	B-Application
Enterprise	O
Server	O
.	O
</s>
<s>
The	O
Windows	B-Application
Enterprise	O
version	O
currently	O
runs	O
only	O
on	O
the	O
64-bit	O
flavors	O
of	O
Windows	B-Device
Server	I-Device
2008	I-Device
R2	I-Device
SP1	O
and	O
Windows	B-Device
Server	I-Device
2012	I-Device
R2	O
;	O
32-bit	O
versions	O
are	O
not	O
currently	O
supported	O
.	O
</s>
<s>
The	O
Windows	B-Application
Workstation	O
version	O
currently	O
runs	O
on	O
only	O
the	O
64-bit	O
flavors	O
of	O
Windows	B-Application
7	O
,	O
Windows	B-Application
8.1	O
,	O
and	O
Windows	B-Application
10	O
;	O
32-bit	O
versions	O
are	O
not	O
currently	O
supported	O
.	O
</s>
<s>
The	O
current	O
version	O
of	O
CAS	O
for	O
Linux	B-Application
supports	O
write-through	O
,	O
write-back	O
,	O
and	O
write-around	O
caching	O
.	O
</s>
<s>
The	O
Windows	B-Application
versions	O
of	O
CAS	O
support	O
write-through	O
and	O
write-back	O
caching	O
.	O
</s>
<s>
A	O
workstation	O
version	O
,	O
called	O
CAS-W	O
,	O
was	O
announced	O
in	O
September	O
2013	O
by	O
Dell	O
;	O
Dell	O
's	O
announcement	O
states	O
an	O
exclusive	O
agreement	O
with	O
Intel	O
to	O
offer	O
CAS-W	O
only	O
for	O
Dell	B-Operating_System
Precision	I-Operating_System
workstations	O
.	O
</s>
