<s>
Altix	B-Architecture
is	O
a	O
line	O
of	O
server	B-Application
computers	I-Application
and	O
supercomputers	B-Architecture
produced	O
by	O
Silicon	O
Graphics	O
(	O
and	O
successor	O
company	O
Silicon	O
Graphics	O
International	O
)	O
,	O
based	O
on	O
Intel	O
processors	B-General_Concept
.	O
</s>
<s>
It	O
succeeded	O
the	O
MIPS/IRIX	O
-based	O
Origin	O
3000	O
servers	O
.	O
</s>
<s>
The	O
line	O
was	O
first	O
announced	O
on	O
January	O
7	O
,	O
2003	O
,	O
with	O
the	O
Altix	B-Architecture
3000	O
series	O
,	O
based	O
on	O
Intel	B-General_Concept
Itanium	I-General_Concept
2	O
processors	B-General_Concept
and	O
SGI	O
's	O
NUMAlink	B-Architecture
processor	B-General_Concept
interconnect	O
.	O
</s>
<s>
At	O
product	O
introduction	O
,	O
the	O
system	O
supported	O
up	O
to	O
64	O
processors	B-General_Concept
running	O
Linux	B-Operating_System
as	O
a	O
single	B-Operating_System
system	I-Operating_System
image	I-Operating_System
and	O
shipped	O
with	O
a	O
Linux	B-Operating_System
distribution	O
called	O
SGI	O
Advanced	O
Linux	B-Operating_System
Environment	O
,	O
which	O
was	O
compatible	O
with	O
Red	O
Hat	O
Advanced	O
Server	O
.	O
</s>
<s>
By	O
August	O
2003	O
,	O
many	O
SGI	B-Architecture
Altix	I-Architecture
customers	O
were	O
running	O
Linux	B-Operating_System
on	O
128	O
-	O
and	O
256-processor	O
SGI	B-Architecture
Altix	I-Architecture
systems	O
.	O
</s>
<s>
SGI	O
officially	O
announced	O
256-processor	O
support	O
within	O
a	O
single	B-Operating_System
system	I-Operating_System
image	I-Operating_System
of	O
Linux	B-Operating_System
on	O
March	O
10	O
,	O
2004	O
,	O
using	O
a	O
2.4-based	O
Linux	B-Operating_System
kernel	I-Operating_System
.	O
</s>
<s>
The	O
SGI	O
Advanced	O
Linux	B-Operating_System
Environment	O
was	O
eventually	O
dropped	O
after	O
support	O
using	O
a	O
standard	O
,	O
unmodified	O
SUSE	O
Linux	B-Operating_System
Enterprise	B-Application
Server	I-Application
(	O
SLES	O
)	O
distribution	O
for	O
SGI	B-Architecture
Altix	I-Architecture
was	O
provided	O
with	O
SLES	O
8	O
and	O
SLES	O
9	O
.	O
</s>
<s>
Later	O
,	O
SGI	B-Architecture
Altix	I-Architecture
512-processor	O
systems	O
were	O
officially	O
supported	O
using	O
an	O
unmodified	O
,	O
standard	O
Linux	B-Operating_System
distribution	O
with	O
the	O
launch	O
of	O
SLES	O
9	O
SP1	O
.	O
</s>
<s>
Besides	O
full	O
support	O
of	O
SGI	B-Architecture
Altix	I-Architecture
on	O
SUSE	O
Linux	B-Operating_System
Enterprise	B-Application
Server	I-Application
,	O
a	O
standard	O
and	O
unmodified	O
Red	O
Hat	O
Enterprise	O
Linux	B-Operating_System
was	O
also	O
fully	O
supported	O
starting	O
with	O
SGI	B-Architecture
Altix	I-Architecture
3700	O
Bx2	O
with	O
RHEL	O
4	O
and	O
RHEL	O
5	O
with	O
system	O
processor	B-General_Concept
limits	O
defined	O
by	O
Red	O
Hat	O
for	O
those	O
releases	O
.	O
</s>
<s>
On	O
November	O
14	O
,	O
2005	O
,	O
SGI	O
introduced	O
the	O
Altix	B-Architecture
4000	O
series	O
based	O
on	O
the	O
Itanium	B-General_Concept
2	I-General_Concept
.	O
</s>
<s>
The	O
Altix	B-Architecture
3000	O
and	O
4000	O
are	O
distributed	B-Operating_System
shared	I-Operating_System
memory	I-Operating_System
multiprocessors	B-Operating_System
.	O
</s>
<s>
SGI	O
later	O
officially	O
supported	O
1024-processor	O
systems	O
on	O
an	O
unmodified	O
,	O
standard	O
Linux	B-Operating_System
distribution	O
with	O
the	O
launch	O
of	O
SLES	O
10	O
in	O
July	O
2006	O
.	O
</s>
<s>
SGI	B-Architecture
Altix	I-Architecture
4700	O
was	O
also	O
officially	O
supported	O
by	O
Red	O
Hat	O
with	O
RHEL	O
4	O
and	O
RHEL	O
5	O
maximum	O
processor	B-General_Concept
limits	O
were	O
as	O
defined	O
by	O
Red	O
Hat	O
for	O
its	O
RHEL	O
releases	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
brand	O
was	O
used	O
for	O
systems	O
based	O
on	O
multi-core	B-Architecture
Intel	B-Device
Xeon	I-Device
processors	B-General_Concept
.	O
</s>
<s>
These	O
include	O
the	O
Altix	B-Architecture
XE	O
rackmount	B-Application
servers	O
,	O
Altix	B-Architecture
ICE	O
blade	B-Architecture
servers	I-Architecture
and	O
Altix	B-Architecture
UV	O
supercomputers	B-Architecture
.	O
</s>
<s>
NASA	O
's	O
Columbia	B-General_Concept
supercomputer	I-General_Concept
,	O
installed	O
in	O
2004	O
and	O
decommissioned	O
in	O
2013	O
,	O
was	O
a	O
10240-microprocessor	O
cluster	B-Architecture
of	O
twenty	O
Altix	B-Architecture
3000	O
systems	O
,	O
each	O
with	O
512	O
microprocessors	O
,	O
interconnected	O
with	O
InfiniBand	B-Architecture
.	O
</s>
<s>
The	O
Altix	B-Architecture
3000	O
is	O
the	O
first	O
generation	O
of	O
Altix	B-Architecture
systems	O
.	O
</s>
<s>
It	O
was	O
succeeded	O
by	O
the	O
Altix	B-Architecture
4000	O
in	O
2004	O
,	O
and	O
the	O
last	O
model	O
was	O
discontinued	O
on	O
December	O
31	O
,	O
2006	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
330	O
is	O
an	O
entry-level	O
server	O
.	O
</s>
<s>
Unlike	O
the	O
high-end	O
models	O
,	O
the	O
Altix	B-Architecture
330	O
is	O
not	O
"	O
brick	O
"	O
based	O
,	O
but	O
is	O
instead	O
based	O
on	O
1U-high	O
compute	O
modules	O
mounted	O
in	O
a	O
rack	O
and	O
connected	O
with	O
NUMAlink	B-Architecture
.	O
</s>
<s>
A	O
single	O
system	O
may	O
contain	O
1	O
to	O
16	O
Itanium	B-General_Concept
2	I-General_Concept
processors	B-General_Concept
and	O
2	O
to	O
128	O
GB	O
of	O
memory	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
1330	O
is	O
a	O
cluster	B-Architecture
of	O
Altix	B-Architecture
330	O
systems	O
.	O
</s>
<s>
The	O
systems	O
are	O
networked	O
with	O
Gigabit	O
Ethernet	O
or	O
4X	O
InfiniBand	B-Architecture
.	O
</s>
<s>
The	O
Altix	B-Architecture
350	O
is	O
a	O
mid-range	O
model	O
that	O
supports	O
up	O
to	O
32	O
Itanium	B-General_Concept
2	I-General_Concept
processors	B-General_Concept
.	O
</s>
<s>
Introduced	O
in	O
2005	O
,	O
it	O
runs	O
Linux	B-Operating_System
,	O
rather	O
than	O
SGI	O
's	O
own	O
Unix	B-Application
variant	O
,	O
IRIX	B-Operating_System
.	O
</s>
<s>
The	O
Altix	B-Architecture
350	O
is	O
scalable	O
from	O
one	O
to	O
thirty-two	O
64-bit	B-Device
Intel	B-General_Concept
Itanium	I-General_Concept
processors	B-General_Concept
.	O
</s>
<s>
It	O
features	O
DDR	O
SDRAM	O
and	O
PCI-X	O
expansion	O
ports	O
,	O
and	O
can	O
support	O
SCSI	B-Architecture
or	O
SATA	O
internal	B-Device
hard	I-Device
drives	I-Device
.	O
</s>
<s>
Designed	O
as	O
a	O
rack-mount	B-Application
server	O
,	O
the	O
Altix	B-Architecture
350	O
is	O
2U	O
,	O
meaning	O
it	O
occupies	O
two	O
slots	O
vertically	O
in	O
a	O
standard	O
server	B-Application
rack	I-Application
.	O
</s>
<s>
The	O
Altix	B-Architecture
1350	O
is	O
a	O
cluster	B-Architecture
of	O
Altix	B-Architecture
350	O
systems	O
.	O
</s>
<s>
,	O
the	O
Altix	B-Architecture
350	O
was	O
superseded	O
by	O
the	O
Altix	B-Architecture
450	O
(	O
based	O
on	O
the	O
Itanium	B-General_Concept
2	I-General_Concept
)	O
and	O
the	O
Altix	B-Architecture
XE	O
(	O
based	O
on	O
the	O
Xeon	B-Device
)	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
3300	O
is	O
a	O
mid-range	O
model	O
supporting	O
4	O
to	O
12	O
processors	B-General_Concept
and	O
2	O
to	O
48	O
GB	O
of	O
memory	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
3700	O
is	O
a	O
high-end	O
model	O
supporting	O
16	O
to	O
512	O
processors	B-General_Concept
and	O
8	O
GB	O
to	O
2	O
TB	O
of	O
memory	O
.	O
</s>
<s>
A	O
variant	O
of	O
the	O
Altix	B-Architecture
3000	O
with	O
graphics	O
capability	O
is	O
known	O
as	O
the	O
Prism	B-Device
.	O
</s>
<s>
The	O
3700	O
is	O
based	O
on	O
the	O
third	O
generation	O
NUMAflex	O
distributed	B-Operating_System
shared	I-Operating_System
memory	I-Operating_System
architecture	O
and	O
it	O
uses	O
the	O
NUMAlink	B-Architecture
4	I-Architecture
interconnection	O
fabric	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
3000	O
supports	O
a	O
single	B-Operating_System
system	I-Operating_System
image	I-Operating_System
of	O
64	O
processors	B-General_Concept
.	O
</s>
<s>
If	O
there	O
are	O
more	O
than	O
64	O
processors	B-General_Concept
in	O
a	O
system	O
,	O
then	O
the	O
system	O
must	O
be	O
partitioned	O
.	O
</s>
<s>
The	O
basic	O
building	O
block	O
is	O
called	O
a	O
C-brick	O
,	O
which	O
contains	O
two	O
nodes	O
in	O
a	O
4U	O
high	O
rackmount	B-Application
unit	O
.	O
</s>
<s>
Each	O
node	O
contains	O
two	O
Intel	B-General_Concept
Itanium	I-General_Concept
2	O
processors	B-General_Concept
that	O
connect	O
to	O
the	O
Super-Bedrock	O
application-specific	O
integrated	O
circuit	O
through	O
a	O
single	O
front-side	B-Architecture
bus	I-Architecture
.	O
</s>
<s>
The	O
Super-Bedrock	O
is	O
a	O
crossbar	O
switch	O
for	O
the	O
processors	B-General_Concept
,	O
the	O
local	O
RAM	O
,	O
the	O
network	O
interface	O
and	O
the	O
I/O	O
interface	O
.	O
</s>
<s>
The	O
two	O
Super-Bedrock	O
ASICs	O
in	O
each	O
brick	O
are	O
connected	O
internally	O
by	O
a	O
single	O
6.4	O
GB/s	O
NUMAlink	B-Architecture
4	I-Architecture
channel	O
.	O
</s>
<s>
A	O
processor	B-General_Concept
node	O
also	O
contains	O
16	O
DIMM	B-General_Concept
slots	O
that	O
accept	O
standard	O
DDR	O
DIMMs	B-General_Concept
with	O
capacities	O
of	O
4	O
to	O
16	O
GB	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
3700	O
Bx2	O
is	O
a	O
high-end	O
model	O
supporting	O
16	O
to	O
2,048	O
Itanium	B-General_Concept
2	I-General_Concept
processors	B-General_Concept
and	O
12	O
GB	O
to	O
24	O
TB	O
of	O
memory	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
4000	O
is	O
the	O
next	O
Itanium-based	O
product	O
line	O
.	O
</s>
<s>
It	O
has	O
two	O
models	O
,	O
the	O
Altix	B-Architecture
450	O
a	O
mid-range	O
server	O
,	O
and	O
the	O
Altix	B-Architecture
4700	O
a	O
high-end	O
server	O
.	O
</s>
<s>
An	O
Altix	B-Architecture
4700	O
system	O
contains	O
up	O
to	O
2048	O
dual-core	B-Architecture
Itanium	B-General_Concept
2	I-General_Concept
and	O
Itanium	B-General_Concept
(	O
"	O
Montvale	B-General_Concept
"	O
revision	O
)	O
microprocessor	O
sockets	O
,	O
connected	O
by	O
the	O
NUMAlink	B-Architecture
4	I-Architecture
interconnect	O
in	O
a	O
fat	B-Protocol
tree	I-Protocol
network	O
topology	O
.	O
</s>
<s>
The	O
microprocessors	O
are	O
accompanied	O
by	O
up	O
to	O
128	O
TB	O
of	O
memory	O
(	O
192TB	O
with	O
single	O
microprocessor	O
socket	O
blades	O
and	O
16GB	O
DIMMs	B-General_Concept
)	O
.	O
</s>
<s>
Each	O
node	O
is	O
contained	O
within	O
a	O
blade	B-Architecture
that	O
plugs	O
into	O
an	O
enclosure	O
,	O
the	O
individual	O
rack	O
unit	O
(	O
IRU	O
)	O
.	O
</s>
<s>
Two	O
types	O
of	O
node	O
,	O
processor	B-General_Concept
and	O
memory	O
,	O
are	O
contained	O
within	O
a	O
blade	B-Architecture
.	O
</s>
<s>
Compute	O
blades	O
contain	O
a	O
processor	B-General_Concept
node	O
and	O
consist	O
of	O
two	O
PAC611	O
sockets	O
for	O
Itanium	B-General_Concept
2	I-General_Concept
and	O
Itanium	B-General_Concept
microprocessors	I-General_Concept
,	O
a	O
Super-Hub	O
(	O
SHub	O
)	O
application-specific	O
integrated	O
circuit	O
(	O
ASIC	O
)	O
(	O
chipset	B-Device
)	O
and	O
eight	O
dual	B-General_Concept
in-line	I-General_Concept
memory	I-General_Concept
module	I-General_Concept
(	O
DIMM	B-General_Concept
)	O
slots	O
for	O
memory	O
.	O
</s>
<s>
The	O
number	O
of	O
microprocessor	O
sockets	O
in	O
a	O
compute	O
blade	B-Architecture
is	O
one	O
or	O
two	O
.	O
</s>
<s>
One-processor	O
socket	O
configurations	O
provide	O
more	O
bandwidth	O
as	O
only	O
one	O
microprocessor	O
socket	O
is	O
using	O
the	O
front	B-Architecture
side	I-Architecture
bus	I-Architecture
and	O
local	O
memory	O
.	O
</s>
<s>
Two-processor	O
socket	O
configurations	O
do	O
not	O
support	O
hyperthreading	O
.	O
</s>
<s>
Memory	O
blades	O
are	O
used	O
to	O
expand	O
the	O
amount	O
of	O
memory	O
without	O
increasing	O
the	O
number	O
of	O
processors	B-General_Concept
.	O
</s>
<s>
They	O
contain	O
a	O
SHub	O
ASIC	O
and	O
12	O
DIMM	B-General_Concept
slots	O
.	O
</s>
<s>
Both	O
compute	O
and	O
memory	O
blades	O
support	O
1	O
,	O
2	O
4	O
,	O
8	O
,	O
and	O
16	O
GB	O
DIMMs	B-General_Concept
.	O
</s>
<s>
SGI	O
support	O
does	O
not	O
support	O
any	O
installations	O
with	O
16GB	O
DIMMs	B-General_Concept
.	O
</s>
<s>
Multiple	O
servers	O
can	O
be	O
combined	O
on	O
the	O
same	O
Numalink	B-Architecture
fabric	O
up	O
to	O
the	O
theoretical	O
maximum	O
of	O
8,192	O
nodes	O
(	O
16,384	O
OS	O
CPUs	O
)	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
XE	O
servers	O
use	O
Intel	B-Device
Xeon	I-Device
x86-64-architecture	O
processors	B-General_Concept
.	O
</s>
<s>
The	O
Altix	B-Architecture
XE210	O
server	O
supports	O
up	O
to	O
two	O
Dual	O
or	O
Quad-Core	B-Device
Intel	I-Device
Xeon	I-Device
processors	B-General_Concept
,	O
5100	O
Series	O
or	O
5300	O
series	O
,	O
32GB	O
DDR2	O
667MHz	O
FBDIMM	O
memory	O
,	O
1	O
x	O
PCIe	O
x8	O
(	O
low	O
profile	O
)	O
and	O
1	O
x	O
PCI-X	O
133MHz	O
(	O
full	O
height	O
)	O
PCI	O
slots	O
,	O
and	O
Three	O
SATA/SAS	O
drive	O
bays	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
XE240	O
server	O
supports	O
up	O
to	O
two	O
Dual	O
or	O
Quad-Core	B-Device
Intel	I-Device
Xeon	I-Device
processors	B-General_Concept
,	O
5100	O
Series	O
or	O
5300	O
series	O
,	O
32GB	O
DDR2	O
667MHz	O
FBDIMM	O
memory	O
,	O
two	O
PCI	O
slots	O
configuration	O
options	O
(	O
option	O
1	O
:	O
2	O
x	O
PCIe	O
x4	O
(	O
low	O
profile	O
)	O
,	O
2	O
x	O
PCIe	O
x4	O
(	O
full	O
height	O
)	O
,	O
1	O
x	O
PCEe	O
x8	O
(	O
full	O
height	O
)	O
;	O
or	O
option	O
2	O
:	O
2	O
x	O
PCIe	O
x4	O
(	O
low	O
profile	O
)	O
,	O
3	O
x	O
PCI-X	O
133MHz	O
(	O
full	O
height	O
)	O
,	O
1	O
x	O
PCI-X	O
133MHz	O
(	O
full	O
height	O
)	O
,	O
and	O
Five	O
SATA/SAS	O
drive	O
bays	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
XE270	O
server	O
is	O
a	O
2U	O
configuration	O
with	O
Intel	B-Device
Xeon	I-Device
processor	B-General_Concept
5500	O
series	O
,	O
with	O
a	O
choice	O
of	O
up	O
to	O
18	O
DDR3	O
DIMMs	B-General_Concept
(	O
2GB	O
,	O
4GB	O
,	O
or	O
8GB	O
DIMMs	B-General_Concept
)	O
,	O
2	O
x	O
PCIe	O
x8	O
gen	O
2	O
(	O
low	O
profile	O
)	O
,	O
1	O
x	O
PCIe	O
x4	O
gen	O
1	O
(	O
low	O
profile	O
)	O
,	O
2	O
x	O
PCI-x	O
133/100	O
(	O
low	O
profile	O
)	O
PCI	O
slots	O
,	O
eight	O
SATA	O
or	O
SAS	O
drive	O
bays	O
with	O
optional	O
hardware	O
RAID	O
(	O
0	O
,	O
1	O
,	O
5	O
,	O
6	O
,	O
10	O
)	O
,	O
</s>
<s>
The	O
Altix	B-Architecture
XE310	O
server	O
was	O
introduced	O
January	O
8	O
,	O
2007	O
and	O
contains	O
two	O
nodes	O
per	O
XE310	O
,	O
up	O
to	O
four	O
Dual	O
or	O
Quad-Core	B-Device
Intel	I-Device
Xeon	I-Device
processors	B-General_Concept
,	O
5100	O
Series	O
or	O
5300	O
series	O
(	O
two	O
per	O
node	O
)	O
,	O
64GB	O
DDR2	O
667MHz	O
FBDIMM	O
memory	O
(	O
32GB	O
per	O
node	O
)	O
,	O
2	O
x	O
PCIe	O
x8	O
(	O
1	O
per	O
node	O
)	O
PCI	O
slots	O
,	O
and	O
Four	O
SATA/SAS	O
drive	O
bays	O
(	O
two	O
per	O
node	O
)	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
XE340	O
server	O
contains	O
2	O
compute	O
nodes	O
within	O
a	O
1U	O
configuration	O
,	O
Intel	B-Device
Xeon	I-Device
processor	B-General_Concept
5500	O
series	O
,	O
Choice	O
of	O
up	O
to	O
12	O
DDR3	O
DIMMs	B-General_Concept
per	O
node	O
(	O
2GB	O
,	O
4GB	O
,	O
or	O
8GB	O
DIMMs	B-General_Concept
)	O
,	O
2	O
x	O
PCIe	O
x16	O
(	O
1	O
per	O
node	O
)	O
-	O
low	O
profile	O
PCI	O
slot	O
,	O
and	O
Four	O
SATA	O
drive	O
bays	O
(	O
2	O
per	O
node	O
)	O
with	O
optional	O
SAS	O
and	O
hardware	O
RAID	O
0	O
,	O
1	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
XE500	O
server	O
is	O
a	O
3U	O
configuration	O
with	O
Intel	B-Device
Xeon	I-Device
processor	B-General_Concept
5500	O
series	O
,	O
with	O
a	O
choice	O
of	O
up	O
to	O
18	O
DDR3	O
DIMMs	B-General_Concept
(	O
2GB	O
,	O
4GB	O
,	O
or	O
8GB	O
DIMMs	B-General_Concept
)	O
,	O
2	O
x	O
PCIe	O
x16	O
gen2	O
(	O
full	O
height	O
)	O
and	O
4	O
x	O
PCIe	O
x8	O
gen2	O
(	O
full	O
height	O
)	O
PCI	O
slots	O
,	O
and	O
Eight	O
SATA	O
or	O
SAS	O
drives	O
with	O
optional	O
hardware	O
RAID	O
(	O
0	O
,	O
1	O
,	O
5	O
,	O
6	O
,	O
10	O
)	O
.	O
</s>
<s>
All	O
Altix	B-Architecture
XE	O
systems	O
support	O
Novell	O
SUSE	O
Linux	B-Operating_System
Enterprise	B-Application
Server	I-Application
,	O
Red	O
Hat	O
Enterprise	O
Linux	B-Operating_System
,	O
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
VMware	O
support	O
was	O
added	O
across	O
the	O
Altix	B-Architecture
XE	O
product	O
line	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
ICE	O
blade	B-Architecture
platform	O
is	O
an	O
Intel	O
Xeon-based	O
system	O
featuring	O
diskless	O
compute	O
blades	O
and	O
a	O
Hierarchical	O
Management	O
Framework	O
(	O
HMF	O
)	O
for	O
scalability	O
,	O
performance	O
,	O
and	O
resiliency	O
.	O
</s>
<s>
While	O
the	O
earlier	O
Itanium-based	O
Altix	B-Architecture
systems	O
run	O
a	O
single-system	B-Operating_System
image	I-Operating_System
(	O
SSI	O
)	O
Linux	B-Operating_System
kernel	I-Operating_System
on	O
1024	O
processors	B-General_Concept
or	O
more	O
using	O
a	O
standard	O
SuSE	O
Linux	B-Operating_System
Enterprise	B-Application
Server	I-Application
(	O
SLES	O
)	O
distribution	O
,	O
the	O
Altix	B-Architecture
ICE	O
's	O
clustering	O
capabilities	O
use	O
standard	O
SLES	O
or	O
Red	O
Hat	O
Enterprise	O
Linux	B-Operating_System
distributions	O
and	O
scale	O
to	O
over	O
51,200	O
cores	O
on	O
NASA	O
's	O
Pleiades	B-Device
supercomputer	I-Device
.	O
</s>
<s>
The	O
Altix	B-Architecture
ICE	O
8200LX	O
blade	B-Architecture
enclosure	I-Architecture
features	O
two	O
4x	O
DDR	O
IB	O
switch	O
blade	B-Architecture
and	O
one	O
high-performing	O
plane	O
,	O
and	O
the	O
Altix	B-Architecture
ICE	O
8200EX	O
features	O
four	O
4x	O
DDR	O
IB	O
switch	O
blades	O
,	O
and	O
two	O
high-performing	O
planes	O
.	O
</s>
<s>
Both	O
configurations	O
support	O
either	O
hypercube	B-Operating_System
or	O
fat	B-Protocol
tree	I-Protocol
topology	O
,	O
and	O
16	O
compute	O
blades	O
within	O
an	O
IRU	O
.	O
</s>
<s>
The	O
IP-83	O
and	O
IP-85	O
compute	O
blades	O
support	O
Intel	B-Device
Xeon	I-Device
5200	O
or	O
5400	O
Series	O
processors	B-General_Concept
,	O
and	O
the	O
IP-95	O
compute	O
blade	B-Architecture
support	O
Intel	B-Device
Xeon	I-Device
5500	O
Series	O
processors	B-General_Concept
.	O
</s>
<s>
In	O
November	O
2011	O
the	O
ICE	O
8400	O
is	O
based	O
on	O
either	O
Intel	B-Device
Xeon	I-Device
5500	O
or	O
5600	O
processors	B-General_Concept
or	O
the	O
AMD	O
Opteron	O
6100	O
series	O
processors	B-General_Concept
.	O
</s>
<s>
,	O
these	O
use	O
the	O
Xeon	B-General_Concept
Phi	I-General_Concept
coprocessors	O
.	O
</s>
<s>
The	O
Altix	B-Architecture
UV	O
supercomputer	B-Architecture
architecture	O
was	O
announced	O
in	O
November	O
2009	O
.	O
</s>
<s>
Codenamed	O
Ultraviolet	O
during	O
development	O
,	O
the	O
Altix	B-Architecture
UV	O
combines	O
a	O
development	O
of	O
the	O
NUMAlink	B-Architecture
interconnect	O
used	O
in	O
the	O
Altix	B-Architecture
4000	O
(	O
NUMAlink	B-Architecture
5	O
)	O
with	O
quad-	O
,	O
six	O
-	O
or	O
eight-core	O
"	O
Nehalem-EX	B-Device
"	O
Intel	B-Device
Xeon	I-Device
7500	O
processors	B-General_Concept
.	O
</s>
<s>
Altix	B-Architecture
UV	O
systems	O
run	O
either	O
SuSE	O
Linux	B-Operating_System
Enterprise	B-Application
Server	I-Application
or	O
Red	O
Hat	O
Enterprise	O
Linux	B-Operating_System
,	O
and	O
scale	O
from	O
32	O
to	O
2,048	O
cores	O
with	O
support	O
for	O
up	O
to	O
16	O
Terabytes	O
(	O
TB	O
)	O
of	O
shared	O
memory	O
in	O
a	O
single	B-Operating_System
system	I-Operating_System
image	I-Operating_System
.	O
</s>
<s>
In	O
2010	O
and	O
2011	O
,	O
SGI	O
retired	O
the	O
Altix	B-Architecture
name	O
for	O
new	O
servers	O
produced	O
by	O
the	O
company	O
.	O
</s>
<s>
Altix	B-Architecture
UV	O
and	O
Altix	B-Architecture
ICE	O
have	O
been	O
shortened	O
to	O
"	O
SGI	O
UV	O
"	O
and	O
"	O
SGI	O
ICE	O
,	O
"	O
while	O
the	O
Altix	B-Architecture
XE	O
line	O
is	O
named	O
"	O
Rackable.	O
"	O
</s>
