<s>
A	O
data	B-Operating_System
center	I-Operating_System
64	B-Device
bit	I-Device
microserver	B-Application
is	O
a	O
server	B-Application
class	O
computer	O
which	O
is	O
based	O
on	O
a	O
system	B-Architecture
on	I-Architecture
a	I-Architecture
chip	I-Architecture
(	O
SoC	O
)	O
.	O
</s>
<s>
The	O
goal	O
is	O
to	O
integrate	O
all	O
of	O
the	O
server	B-Application
motherboard	O
functions	O
onto	O
a	O
single	O
microchip	O
,	O
except	O
DRAM	O
,	O
boot	B-Device
FLASH	I-Device
and	O
power	O
circuits	O
.	O
</s>
<s>
Thus	O
,	O
the	O
main	O
chip	O
contains	O
more	O
than	O
only	O
compute	B-General_Concept
cores	I-General_Concept
,	O
caches	B-General_Concept
,	O
memory	O
interfaces	O
and	O
PCI	O
controllers	O
.	O
</s>
<s>
It	O
typically	O
also	O
contains	O
SATA	O
,	O
networking	O
,	O
serial	O
port	O
and	O
boot	B-Device
FLASH	I-Device
interfaces	O
on	O
the	O
same	O
chip	O
.	O
</s>
<s>
Multiple	O
microservers	B-Application
can	O
be	O
put	O
together	O
in	O
a	O
small	O
package	O
to	O
construct	O
dense	O
data	B-Operating_System
center	I-Operating_System
(	O
example	O
:	O
DOME	O
MicroDataCenter	O
)	O
.	O
</s>
<s>
The	O
term	O
"	O
microserver	B-Application
"	O
first	O
appeared	O
in	O
the	O
late	O
1990s	O
and	O
was	O
popularized	O
by	O
a	O
Palo	O
Alto	O
incubator	O
;	O
PicoStar	O
when	O
incubating	O
Cobalt	O
Microservers	B-Application
.	O
</s>
<s>
Microserver	B-Application
again	O
appeared	O
around	O
2010	O
and	O
is	O
commonly	O
misunderstood	O
to	O
imply	O
low	O
performance	O
.	O
</s>
<s>
Microservers	B-Application
first	O
appeared	O
in	O
the	O
embedded	O
market	O
,	O
where	O
due	O
to	O
cost	O
and	O
space	O
these	O
types	O
of	O
SoCs	O
appeared	O
before	O
they	O
did	O
in	O
general	O
purpose	O
computing	O
.	O
</s>
<s>
Indeed	O
,	O
recent	O
research	O
indicates	O
that	O
emerging	O
scale-out	O
services	O
and	O
popular	O
datacenter	B-Operating_System
workloads	O
(	O
e.g.	O
,	O
as	O
in	O
CloudSuite	O
)	O
require	O
a	O
certain	O
degree	O
of	O
single-thread	O
performance	O
(	O
with	O
out-of-order	O
execution	O
cores	O
)	O
which	O
may	O
be	O
lower	O
than	O
those	O
in	O
conventional	O
desktop	O
processors	O
but	O
much	O
higher	O
than	O
those	O
in	O
the	O
embedded	O
systems	O
.	O
</s>
<s>
A	O
modern	O
microserver	B-Application
typically	O
offers	O
medium-high	O
performance	O
at	O
high	O
packaging	O
densities	O
,	O
allowing	O
very	O
small	O
compute	O
node	O
form	O
factors	O
.	O
</s>
<s>
One	O
of	O
the	O
early	O
microservers	B-Application
is	O
the	O
32-bit	O
SheevaPlug	B-Application
.	O
</s>
<s>
There	O
are	O
plenty	O
of	O
consumer	O
grade	O
32-bit	O
microservers	B-Application
available	O
,	O
for	O
instance	O
the	O
Banana	B-Application
Pi	I-Application
as	O
seen	O
on	O
Comparison	O
of	O
single-board	O
computers	O
.	O
</s>
<s>
Early	O
2015	O
,	O
even	O
a	O
64-bit	B-Device
consumer	O
grade	O
microserver	B-Application
is	O
announced	O
.	O
</s>
<s>
Mid	O
2017	O
consumer-grade	O
64-bit	B-Device
microservers	B-Application
started	O
appear	O
,	O
for	O
example	O
the	O
Raspberry-Pi3	O
.	O
</s>
<s>
Data-Center-grade	O
microservers	B-Application
need	O
to	O
be	O
64-bit	B-Device
and	O
run	O
server	B-Application
class	O
operating	O
systems	O
such	O
as	O
RHEL	O
or	O
SUSE	O
.	O
</s>
<s>
Dell	O
was	O
among	O
the	O
first	O
to	O
build	O
a	O
commercially	O
available	O
microserver	B-Application
.	O
</s>
<s>
In	O
May	O
2009	O
Dell	O
launched	O
the	O
Fortuna	O
platform	O
based	O
on	O
the	O
VIA	B-Device
Nano	I-Device
processor	O
.	O
</s>
<s>
SeaMicro	B-Device
followed	O
shortly	O
after	O
Dell	O
with	O
one	O
of	O
the	O
first	O
generally	O
available	O
microservers	B-Application
.	O
</s>
<s>
SeaMicro	B-Device
launched	O
the	O
SM10000	O
in	O
June	O
2010	O
.	O
</s>
<s>
The	O
SM1000	O
was	O
based	O
on	O
the	O
Intel	B-Device
Atom	I-Device
processor	O
.	O
</s>
<s>
SeaMicro	B-Device
followed	O
the	O
SM1000	O
with	O
the	O
SM1000-64	O
using	O
a	O
64	B-Device
bit	I-Device
Atom	B-Device
processor	I-Device
,	O
and	O
then	O
switched	O
to	O
Intel	O
's	O
Sandy	B-Device
Bridge	I-Device
processor	O
for	O
the	O
SM1000-XE	O
in	O
2011	O
.	O
</s>
<s>
Calxeda	B-Architecture
,	O
now	O
out	O
of	O
business	O
,	O
was	O
one	O
of	O
the	O
first	O
companies	O
to	O
start	O
building	O
ARM	O
based	O
microservers	B-Application
,	O
using	O
32-bit	O
ARM	O
cores	O
.	O
</s>
<s>
They	O
went	O
out	O
of	O
business	O
before	O
they	O
could	O
make	O
the	O
transition	O
to	O
64-bit	B-Device
.	O
</s>
<s>
Hewlett-Packard	O
has	O
the	O
commercial	O
Moonshot	O
product	O
line	O
with	O
64-bit	B-Device
capability	O
.	O
</s>
<s>
In	O
2015	O
microservers	B-Application
,	O
sometimes	O
also	O
(	O
confusingly	O
)	O
called	O
'	O
scale-out	O
servers	O
 '	O
or	O
even	O
'	O
scale-in	O
servers	O
 '	O
are	O
getting	O
plenty	O
of	O
attention	O
in	O
the	O
press	O
.	O
</s>
