<s>
The	O
HP	B-Device
Superdome	I-Device
is	O
a	O
high-end	O
server	O
computer	O
designed	O
and	O
manufactured	O
by	O
Hewlett	O
Packard	O
Enterprise	O
(	O
formerly	O
Hewlett-Packard	O
)	O
.	O
</s>
<s>
The	O
product	O
's	O
most	O
recent	O
version	O
,	O
"	O
Superdome	B-Device
2	O
,	O
"	O
was	O
released	O
in	O
2010	O
supporting	O
2	O
to	O
32	O
sockets	O
(	O
up	O
to	O
128	O
cores	O
)	O
and	O
4	O
TB	O
of	O
memory	O
.	O
</s>
<s>
The	O
Superdome	B-Device
used	O
PA-RISC	O
processors	O
when	O
it	O
debuted	O
in	O
2000	O
.	O
</s>
<s>
Since	O
2002	O
,	O
a	O
second	O
version	O
of	O
the	O
machine	O
based	O
on	O
Itanium	O
2	O
processors	O
has	O
been	O
marketed	O
as	O
the	O
HP	B-Device
Integrity	I-Device
Superdome	I-Device
.	O
</s>
<s>
The	O
classic	O
PA-RISC	O
Superdome	B-Device
was	O
later	O
renamed	O
HP	B-Device
9000	I-Device
Superdome	I-Device
.	O
</s>
<s>
The	O
HP	O
V-Class	O
was	O
the	O
Superdome	B-Device
's	O
predecessor	O
(	O
which	O
was	O
based	O
on	O
a	O
design	O
acquired	O
from	O
Convex	O
)	O
.	O
</s>
<s>
The	O
HP	B-Device
Integrity	I-Device
Superdome	I-Device
2	O
uses	O
the	O
Intel	O
Itanium	O
93xx-series	O
microprocessor	O
,	O
known	O
as	O
"	O
Tukwila	B-General_Concept
"	O
,	O
and	O
is	O
redesigned	O
with	O
parts	O
from	O
the	O
HP	B-Application
BladeSystem	I-Application
C7000	I-Application
enclosure	O
.	O
</s>
<s>
In	O
2016	O
,	O
Hewlett	O
Packard	O
Enterprise	O
released	O
the	O
Superdome	B-Device
X	O
,	O
which	O
is	O
based	O
on	O
Intel	B-Device
Xeon	I-Device
processors	O
.	O
</s>
<s>
Superdome	B-Device
usually	O
runs	O
the	O
HP-UX	B-Application
operating	O
system	O
,	O
although	O
the	O
Itanium	O
2	O
version	O
is	O
also	O
compatible	O
with	O
other	O
systems	O
,	O
for	O
example	O
with	O
Microsoft	O
Windows	O
Server	O
2008	O
R2	O
,	O
SUSE	O
Linux	O
Enterprise	O
Server	O
11	O
SP4	O
,	O
Red	O
Hat	O
Enterprise	O
Linux	O
,	O
Debian	O
Wheezy	O
(	O
while	O
Long	O
Term	O
Support	O
for	O
it	O
has	O
ended	O
)	O
,	O
and	O
OpenVMS	B-Operating_System
V8.2-1	O
.	O
</s>
<s>
There	O
are	O
4	O
different	O
generations	O
of	O
the	O
Superdome	B-Device
:	O
</s>
<s>
Superdome	B-Device
has	O
a	O
ccNUMA	O
architecture	O
,	O
which	O
means	O
that	O
processors	O
have	O
shorter	O
access	O
times	O
for	O
their	O
cell	O
's	O
memory	O
but	O
longer	O
access	O
times	O
for	O
other	O
cell	O
's	O
memories	O
,	O
and	O
data	O
items	O
are	O
allowed	O
to	O
be	O
replicated	O
across	O
individual	O
cache	O
memories	O
but	O
are	O
kept	O
coherent	O
with	O
one	O
another	O
by	O
cache	B-General_Concept
coherence	I-General_Concept
hardware	O
mechanisms	O
.	O
</s>
<s>
A	O
center	O
of	O
each	O
cell	O
is	O
an	O
ASIC	O
called	O
cell	O
controller	O
(	O
CC	O
)	O
,	O
that	O
connects	O
to	O
four	O
processor	O
sockets	O
(	O
providing	O
an	O
average	O
of	O
1.6	O
GB/s	O
of	O
bandwidth	O
per	O
socket	O
)	O
,	O
to	O
four	O
local	O
memory	O
subsystems	O
,	O
and	O
to	O
the	O
backplane	B-Architecture
.	O
</s>
<s>
Each	O
socket	O
may	O
hold	O
either	O
a	O
single-core	O
PA-RISC	O
processor	O
(	O
PA-8600	B-General_Concept
or	O
PA-8700	B-General_Concept
)	O
,	O
or	O
a	O
dual-core	O
PA-RISC	O
processor	O
(	O
PA-8800	B-General_Concept
or	O
PA-8900	B-General_Concept
)	O
,	O
a	O
single-core	O
Itanium	O
2	O
processor	O
,	O
two	O
Itanium	O
2	O
processors	O
(	O
using	O
the	O
mx2	O
module	O
)	O
,	O
or	O
one	O
dual-core	O
Itanium	O
2	O
processor	O
.	O
</s>
<s>
There	O
are	O
almost	O
no	O
architectural	O
differences	O
between	O
PA-RISC	O
and	O
Itanium	O
versions	O
of	O
Superdome	B-Device
.	O
</s>
<s>
Superdome	B-Device
is	O
not	O
mounted	O
on	O
a	O
standard	O
rack	O
,	O
it	O
is	O
instead	O
shipped	O
as	O
either	O
one	O
or	O
two	O
dedicated	O
cabinets	O
.	O
</s>
<s>
Each	O
CC	O
connects	O
to	O
one	O
local	O
I/O	O
controller	O
(	O
an	O
SBA	O
)	O
,	O
which	O
in	O
turn	O
may	O
connect	O
at	O
most	O
to	O
a	O
single	O
I/O	B-Device
card	I-Device
cage	O
(	O
also	O
called	O
I/O	O
chassis	O
)	O
with	O
12	O
PCI-X	O
slots	O
.	O
</s>
<s>
Superdome	B-Device
does	O
not	O
contain	O
any	O
internal	O
hard	B-Device
disks	I-Device
,	O
it	O
relies	O
exclusively	O
on	O
external	O
disk	B-Device
enclosures	I-Device
.	O
</s>
<s>
Superdome	B-Device
supports	O
nPars	O
(	O
hard	O
partitions	O
)	O
,	O
that	O
are	O
granular	O
on	O
the	O
level	O
of	O
a	O
whole	O
cell	O
(	O
and	O
its	O
I/O	B-Device
card	I-Device
cage	O
)	O
.	O
</s>
<s>
The	O
Superdome	B-Device
also	O
supports	O
vPars	O
(	O
virtual	O
partitions	O
)	O
,	O
granular	O
on	O
a	O
single	O
core	O
level	O
and	O
a	O
single	O
PCI	O
slot	O
level	O
.	O
</s>
<s>
This	O
means	O
that	O
a	O
top	O
level	O
nPar	O
can	O
house	O
several	O
vPars	O
to	O
better	O
use	O
the	O
hardware	O
in	O
the	O
Superdome	B-Device
.	O
</s>
<s>
The	O
hardware	O
clock	O
has	O
been	O
moved	O
from	O
the	O
power-board	O
to	O
the	O
backplane	B-Architecture
and	O
doubled	O
for	O
redundancy	O
and	O
greater	O
quality	O
.	O
</s>
<s>
It	O
is	O
unsupported	O
to	O
install	O
any	O
mezzanine	B-Device
cards	I-Device
,	O
although	O
three	O
free	O
slots	O
exist	O
on	O
each	O
blade	O
.	O
</s>
