<s>
NetCache	B-Protocol
is	O
a	O
former	O
web	B-Protocol
cache	I-Protocol
software	O
product	O
which	O
was	O
owned	O
and	O
developed	O
by	O
NetApp	O
between	O
1997	O
and	O
2006	O
,	O
and	O
a	O
hardware	O
product	O
family	O
incorporating	O
the	O
NetCache	B-Protocol
software	O
.	O
</s>
<s>
The	O
NetCache	B-Protocol
software	O
started	O
as	O
a	O
commercial	O
fork	B-Application
of	O
the	O
Harvest	B-Protocol
Object	I-Protocol
Cache	I-Protocol
developed	O
by	O
Internet	B-Protocol
Middleware	I-Protocol
Corporation	I-Protocol
(	O
IMC	O
)	O
,	O
which	O
consisted	O
of	O
former	O
Harvest	B-Protocol
project	I-Protocol
developers	O
including	O
Peter	O
B	O
.	O
Danzig	O
,	O
a	O
professor	O
at	O
University	O
of	O
Southern	O
California	O
.	O
</s>
<s>
In	O
late	O
1996	O
the	O
software	O
was	O
named	O
Internet	B-Protocol
Middleware	I-Protocol
Object	I-Protocol
Cache	I-Protocol
,	O
and	O
it	O
was	O
referred	O
to	O
as	O
Cached	O
2	O
and	O
later	O
Cached	O
3	O
.	O
</s>
<s>
In	O
1997	O
IMC	O
was	O
acquired	O
by	O
NetApp	O
,	O
and	O
the	O
software	O
was	O
renamed	O
NetCache	B-Protocol
,	O
with	O
Danzig	O
becoming	O
chief	O
architect	O
and	O
CTO	O
of	O
NetCache	B-Protocol
division	O
.	O
</s>
<s>
In	O
2006	O
NetApp	O
sold	O
the	O
NetCache	B-Protocol
business	O
(	O
but	O
not	O
technology	O
)	O
to	O
Blue	O
Coat	O
Systems	O
,	O
who	O
had	O
a	O
similar	O
line	O
of	O
ProxySG	O
appliances	O
which	O
became	O
the	O
more	O
expensive	O
product	O
for	O
existing	O
NetApp	O
customers	O
.	O
</s>
<s>
The	O
hardware	O
NetCache	B-Protocol
appliance	O
included	O
the	O
NetApp	O
Data	B-Operating_System
ONTAP	I-Operating_System
microkernel	O
,	O
with	O
its	O
Write	B-Application
Anywhere	I-Application
File	I-Application
Layout	I-Application
file	O
system	O
,	O
achieving	O
four	O
times	O
the	O
throughput	O
as	O
software	O
equivalents	O
available	O
at	O
time	O
,	O
according	O
to	O
NetApp	O
comparisons	O
.	O
</s>
<s>
Starting	O
with	O
ONTAP	B-Operating_System
version	O
9.5	O
similar	O
functionality	O
was	O
introduced	O
under	O
FlexCache	O
name	O
.	O
</s>
