<s>
MareNostrum	B-Device
(	O
,	O
)	O
is	O
the	O
main	O
supercomputer	B-Architecture
in	O
the	O
Barcelona	O
Supercomputing	B-Architecture
Center	O
.	O
</s>
<s>
It	O
is	O
the	O
most	O
powerful	O
supercomputer	B-Architecture
in	O
Spain	O
,	O
one	O
of	O
thirteen	O
supercomputers	B-Architecture
in	O
the	O
Spanish	O
Supercomputing	B-Architecture
Network	O
and	O
one	O
of	O
the	O
seven	O
supercomputers	B-Architecture
of	O
the	O
European	O
infrastructure	O
PRACE	O
(	O
Partnership	O
for	O
Advanced	O
Computing	O
in	O
Europe	O
)	O
.	O
</s>
<s>
MareNostrum	B-Device
runs	O
SUSE	O
Linux11	O
SP3	O
.	O
</s>
<s>
It	O
occupies	O
180m²	O
(	O
less	O
than	O
half	O
a	O
basketball	B-Application
court	O
)	O
.	O
</s>
<s>
The	O
supercomputer	B-Architecture
is	O
used	O
in	O
human	O
genome	O
research	O
,	O
protein	O
research	O
,	O
astrophysical	O
simulations	O
,	O
weather	O
forecasting	O
,	O
geological	O
or	O
geophysical	O
modeling	O
,	O
and	O
the	O
design	O
of	O
new	O
drugs	O
.	O
</s>
<s>
Mare	B-Application
Nostrum	I-Application
(	O
"	O
our	O
sea	O
"	O
)	O
was	O
the	O
Roman	O
name	O
for	O
the	O
Mediterranean	O
Sea	O
.	O
</s>
<s>
The	O
supercomputer	B-Architecture
is	O
housed	O
in	O
the	O
deconsecrated	O
Chapel	O
Torre	O
Girona	O
at	O
the	O
Polytechnic	O
University	O
of	O
Catalonia	O
,	O
Barcelona	O
,	O
Spain	O
.	O
</s>
<s>
MareNostrum	B-Device
4	O
has	O
been	O
dubbed	O
the	O
most	O
diverse	O
and	O
likely	O
the	O
most	O
interesting	O
supercomputer	B-Architecture
in	O
the	O
world	O
thanks	O
to	O
the	O
heterogeneity	O
of	O
the	O
architecture	O
it	O
will	O
include	O
once	O
the	O
installation	O
of	O
the	O
supercomputer	B-Architecture
is	O
complete	O
.	O
</s>
<s>
A	O
high-speed	O
Omnipath	O
network	O
connects	O
all	O
the	O
components	O
in	O
the	O
supercomputer	B-Architecture
to	O
one	O
another	O
.	O
</s>
<s>
MareNostrum	B-Device
4	O
is	O
built	O
inside	O
of	O
the	O
Torre	O
Girona	O
chapel	O
.	O
</s>
<s>
The	O
supercomputer	B-Architecture
includes	O
two	O
separate	O
parts	O
:	O
a	O
general-purpose	O
block	O
and	O
a	O
block	O
featuring	O
emerging	O
technologies	O
.	O
</s>
<s>
These	O
technologies	O
are	O
currently	O
being	O
developed	O
in	O
the	O
United	O
States	O
and	O
Japan	O
to	O
speed	O
up	O
the	O
arrival	O
of	O
the	O
new	O
generation	O
of	O
pre-exascale	O
supercomputers	B-Architecture
.	O
</s>
<s>
Cluster	O
comprising	O
IBM	O
POWER9	B-Device
and	O
NVIDIA	O
Volta	O
GPUs	O
,	O
with	O
a	O
computational	O
capacity	O
of	O
over	O
1.5	O
petaflops	O
.	O
</s>
<s>
IBM	O
and	O
NVIDIA	O
will	O
use	O
these	O
processors	O
for	O
the	O
Summit	O
and	O
Sierra	O
supercomputers	B-Architecture
that	O
the	O
US	O
Department	O
of	O
Energy	O
has	O
ordered	O
for	O
its	O
Oak	O
Ridge	O
and	O
Lawrence	O
Livermore	O
National	O
Laboratories	O
.	O
</s>
<s>
The	O
machine	O
will	O
have	O
a	O
similar	O
processor	O
and	O
accelerator	O
than	O
the	O
Frontier	O
supercomputer	B-Architecture
that	O
will	O
be	O
installed	O
in	O
2021	O
at	O
ORNL	O
.	O
</s>
<s>
Cluster	O
formed	O
of	O
64-bit	O
ARMv8	O
processors	O
in	O
a	O
prototype	O
machine	O
,	O
using	O
state-of-the-art	O
technologies	O
from	O
the	O
Japanese	O
Post-K	O
supercomputer	B-Architecture
.	O
</s>
<s>
The	O
aim	O
of	O
gradually	O
incorporating	O
these	O
emerging	O
technologies	O
into	O
MareNostrum4	O
is	O
to	O
allow	O
BSC	O
to	O
experiment	O
with	O
what	O
are	O
expected	O
to	O
be	O
the	O
most	O
advanced	O
technological	O
developments	O
over	O
the	O
next	O
few	O
years	O
and	O
evaluate	O
their	O
suitability	O
for	O
future	O
iterations	O
of	O
MareNostrum	B-Device
.	O
</s>
<s>
MareNostrum	B-Device
4	O
has	O
a	O
disk	O
storage	O
capacity	O
of	O
14	O
petabytes	O
and	O
is	O
connected	O
to	O
BSC	O
’s	O
big	O
data	O
facilities	O
,	O
which	O
have	O
a	O
total	O
capacity	O
of	O
24.6	O
petabytes	O
.	O
</s>
<s>
The	O
previous	O
version	O
,	O
MareNostrum	B-Device
3	O
,	O
consisted	O
of	O
3,056	O
IBM	O
iDataPlex	B-Device
DX360M4	O
compute	O
nodes	O
,	O
for	O
a	O
total	O
of	O
48,896	O
physical	O
Intel	O
Sandy	O
Bridge	O
cores	O
running	O
at	O
2.6GHz	O
,	O
and	O
84	O
XeonPhi	O
5110P	O
in	O
42	O
nodes	O
.	O
</s>
<s>
Each	O
IBM	O
iDataPlex	B-Device
Compute	O
rack	O
was	O
composed	O
of	O
84	O
IBM	O
iDataPlex	B-Device
dx360	O
M4	O
compute	O
nodes	O
and	O
four	O
Mellanox	O
36-port	O
Managed	O
FDR10	O
IB	O
Switches	O
.	O
</s>
<s>
The	O
computing	O
nodes	O
of	O
MareNostrum	B-Device
3	O
communicated	O
primarily	O
through	O
a	O
high	O
bandwidth	O
,	O
low	O
latency	O
InfiniBand	B-Architecture
FDR10	O
network	O
.	O
</s>
<s>
The	O
different	O
nodes	O
were	O
interconnected	O
via	O
fibre	O
optic	O
cables	O
and	O
Mellanox	O
648-port	O
FDR10	O
Infiniband	B-Architecture
Core	O
Switches	O
.	O
</s>
<s>
These	O
older	O
version	O
has	O
been	O
based	O
on	O
a	O
2,560	O
IBM	B-General_Concept
BladeCenter	I-General_Concept
JS21	B-General_Concept
nodes	O
with	O
PowerPC	O
970MP	O
processors	O
and	O
with	O
20	O
TB	O
system	O
memory	O
.	O
</s>
