<s>
Hekaton	B-Application
(	O
also	O
known	O
as	O
SQL	B-Application
Server	I-Application
In-Memory	I-Application
OLTP	I-Application
)	O
is	O
an	O
in-memory	B-General_Concept
database	I-General_Concept
for	O
OLTP	B-General_Concept
workloads	O
built	O
into	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
.	O
</s>
<s>
Hekaton	B-Application
was	O
designed	O
in	O
collaboration	O
with	O
Microsoft	O
Research	O
and	O
was	O
released	O
in	O
SQL	O
Server	O
2014	O
.	O
</s>
<s>
Traditional	O
RDBMS	O
systems	O
were	O
designed	O
when	O
memory	O
resources	O
were	O
expensive	O
,	O
and	O
were	O
optimized	O
for	O
disk	B-Device
storage	I-Device
.	O
</s>
<s>
Hekaton	B-Application
is	O
instead	O
optimized	O
for	O
a	O
working	O
set	O
stored	O
entirely	O
in	O
main	O
memory	O
,	O
but	O
is	O
still	O
accessible	O
via	O
T-SQL	B-Language
like	O
normal	O
tables	O
.	O
</s>
<s>
Hekaton	B-Application
was	O
announced	O
at	O
the	O
Professional	B-Application
Association	I-Application
for	I-Application
SQL	I-Application
Server	I-Application
(	O
PASS	O
)	O
conference	O
2012	O
.	O
</s>
