<s>
AppFabric	B-Application
is	O
a	O
set	O
of	O
middleware	B-General_Concept
technologies	O
for	O
Windows	B-Device
Server	I-Device
,	O
released	O
by	O
Microsoft	O
.	O
</s>
<s>
It	O
consists	O
of	O
two	O
main	O
feature	O
areas	O
:	O
AppFabric	B-Application
Hosting	O
and	O
AppFabric	B-Application
Caching	I-Application
.	O
</s>
<s>
AppFabric	B-Application
Hosting	O
features	O
provide	O
a	O
way	O
for	O
users	O
to	O
deploy	O
and	O
manage	O
Windows	O
Workflow	O
Foundation	O
(	O
WF	O
)	O
workflows	O
that	O
are	O
hosted	O
in	O
Windows	B-Application
Communication	I-Application
Foundation	I-Application
(	O
WCF	O
)	O
services	O
.	O
</s>
<s>
AppFabric	B-Application
includes	O
an	O
extension	O
of	O
the	O
Internet	B-Application
Information	I-Application
Services	I-Application
management	O
tool	O
that	O
enables	O
an	O
IIS	O
administrator	O
to	O
monitor	O
the	O
performance	O
of	O
services	O
and	O
workflows	O
.	O
</s>
<s>
There	O
is	O
also	O
a	O
set	O
of	O
Windows	B-Application
PowerShell	I-Application
commands	O
to	O
manage	O
persistence	O
,	O
hosting	O
,	O
and	O
monitoring	O
tasks	O
.	O
</s>
<s>
AppFabric	B-Application
Hosting	O
features	O
provides	O
persistence	O
,	O
hosting	O
,	O
and	O
monitoring	O
.	O
</s>
<s>
AppFabric	B-Application
Caching	I-Application
is	O
an	O
in-memory	O
,	O
distributed	B-Operating_System
cache	I-Operating_System
that	O
runs	O
on	O
one	O
or	O
more	O
on-premises	B-General_Concept
servers	O
to	O
provide	O
a	O
performance	O
and	O
scalability	O
boost	O
for	O
.NET	B-Application
Framework	I-Application
applications	O
.	O
</s>
<s>
AppFabric	B-Application
caches	O
store	O
data	O
in	O
key-value	O
pairs	O
using	O
the	O
physical	O
memory	O
across	O
multiple	O
servers	O
.	O
</s>
<s>
Caches	O
are	O
configured	O
and	O
managed	O
through	O
a	O
set	O
of	O
Windows	B-Application
PowerShell	I-Application
commands	O
.	O
</s>
<s>
One	O
use	O
of	O
caching	O
is	O
to	O
store	O
ASP.NET	B-Application
session	O
state	O
data	O
.	O
</s>
<s>
When	O
a	O
user	O
connects	O
to	O
an	O
ASP.NET	B-Application
Web	O
application	O
,	O
the	O
application	O
can	O
store	O
information	O
in	O
session	O
state	O
.	O
</s>
<s>
This	O
enables	O
the	O
ASP.NET	B-Application
application	O
to	O
store	O
large	O
amounts	O
of	O
cached	O
data	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
ASP.NET	B-Application
session	O
state	O
provider	O
,	O
there	O
is	O
also	O
a	O
provider	O
for	O
ASP.NET	B-Application
page	O
output	O
caching	O
.	O
</s>
<s>
.NET	B-Application
applications	O
can	O
directly	O
use	O
the	O
Caching	O
API	O
to	O
programmatically	O
cache	O
and	O
retrieve	O
any	O
serializable	B-Application
managed	O
objects	B-Language
.	O
</s>
<s>
In	O
June	O
2008	O
,	O
Microsoft	O
released	O
the	O
beta	O
version	O
of	O
Windows	B-Device
Server	I-Device
AppFabric	B-Application
with	O
a	O
code	O
name	O
'	O
Velocity	O
 '	O
.	O
</s>
<s>
In	O
June	O
2010	O
,	O
Microsoft	O
released	O
Windows	B-Device
Server	I-Device
AppFabric	B-Application
1.0	O
.	O
</s>
<s>
The	O
next	O
release	O
,	O
1.1	O
,	O
was	O
rebranded	O
to	O
Microsoft	O
AppFabric	B-Application
1.1	O
for	O
Windows	B-Device
Server	I-Device
.	O
</s>
<s>
In	O
April	O
2015	O
,	O
Microsoft	O
announced	O
that	O
it	O
would	O
end	O
support	O
for	O
AppFabric	B-Application
for	O
Windows	B-Device
Server	I-Device
on	O
2	O
April	O
2016	O
.	O
</s>
<s>
In	O
June	O
2015	O
,	O
Microsoft	O
announced	O
that	O
it	O
would	O
end	O
support	O
for	O
AppFabric	B-Application
1.1	O
for	O
Windows	B-Device
Server	I-Device
on	O
11	O
April	O
2017	O
,	O
with	O
Extended	O
Support	O
being	O
available	O
until	O
12	O
April	O
2022	O
.	O
</s>
