<s>
LUMI	B-Device
(	O
Large	O
Unified	O
Modern	O
Infrastructure	O
)	O
is	O
a	O
petascale	B-General_Concept
supercomputer	B-Architecture
located	O
at	O
the	O
CSC	O
data	O
center	O
in	O
Kajaani	O
,	O
Finland	O
.	O
</s>
<s>
,	O
the	O
computer	O
is	O
the	O
fastest	B-Operating_System
supercomputer	I-Operating_System
in	O
Europe	O
.	O
</s>
<s>
The	O
completed	O
system	O
consists	O
of	O
362,496	O
cores	O
,	O
capable	O
of	O
executing	O
more	O
than	O
375	O
petaflops	O
,	O
with	O
a	O
theoretical	O
peak	O
performance	O
of	O
more	O
than	O
550	O
petaflops	O
,	O
which	O
places	O
it	O
among	O
the	O
top	O
five	O
most	B-Operating_System
powerful	I-Operating_System
computers	I-Operating_System
in	I-Operating_System
the	I-Operating_System
world	I-Operating_System
.	O
</s>
<s>
The	O
November	O
2022	O
TOP500	B-Operating_System
ranks	O
LUMI	B-Device
at	O
number	O
three	O
,	O
with	O
a	O
measured	O
performance	O
of	O
301.9	O
PFLOPS	O
.	O
</s>
<s>
The	O
system	O
is	O
being	O
supplied	O
by	O
Hewlett	O
Packard	O
Enterprise	O
(	O
HPE	O
)	O
,	O
providing	O
an	O
HPE	O
Cray	O
EX	O
supercomputer	B-Architecture
with	O
next	O
generation	O
64-core	O
AMD	O
EPYC	O
CPUs	O
and	O
AMD	O
Radeon	B-Operating_System
Instinct	I-Operating_System
GPUs	B-Architecture
.	O
</s>
<s>
LUMI	B-Device
is	O
a	O
GPU	B-Architecture
based	O
system	O
,	O
and	O
the	O
majority	O
of	O
its	O
computing	O
power	O
comes	O
from	O
its	O
GPU	B-Architecture
cores	O
,	O
an	O
architecture	B-General_Concept
which	O
was	O
chosen	O
primarily	O
for	O
its	O
cost/performance	O
advantage	O
.	O
</s>
<s>
The	O
system	O
is	O
equipped	O
with	O
1.75	O
petabytes	O
of	O
RAM	B-Architecture
,	O
and	O
storage	O
includes	O
a	O
7-petabyte	O
partition	O
of	O
flash	O
storage	O
,	O
combined	O
with	O
80-petabytes	O
of	O
traditional	O
storage	O
,	O
both	O
based	O
on	O
the	O
Lustre	B-Application
parallel	O
file	B-Application
system	I-Application
,	O
as	O
well	O
as	O
a	O
30-petabyte	O
data	O
management	O
service	O
based	O
on	O
Ceph	B-Operating_System
.	O
</s>
<s>
LUMI	B-Device
is	O
co-funded	O
by	O
the	O
EuroHPC	O
Joint	O
Undertaking	O
and	O
the	O
LUMI	B-Device
Consortium	O
,	O
which	O
is	O
composed	O
of	O
the	O
following	O
countries	O
:	O
Finland	O
,	O
Belgium	O
,	O
Czech	O
Republic	O
,	O
Denmark	O
,	O
Estonia	O
,	O
Iceland	O
,	O
Norway	O
,	O
Poland	O
,	O
Sweden	O
,	O
and	O
Switzerland	B-Protocol
.	O
</s>
<s>
The	O
computer	O
uses	O
100%	O
hydroelectric	O
energy	O
,	O
and	O
the	O
heat	O
it	O
generates	O
will	O
be	O
captured	O
and	O
used	O
to	O
heat	O
buildings	O
in	O
the	O
area	O
,	O
making	O
LUMI	B-Device
one	O
of	O
the	O
most	O
environmentally	O
efficient	O
supercomputers	B-Architecture
in	O
the	O
world	O
.	O
</s>
<s>
The	O
former	O
UPM	O
paper	O
mill	O
where	O
LUMI	B-Device
is	O
located	O
had	O
only	O
a	O
single	O
2	O
minute	O
power	O
outage	O
during	O
its	O
38	O
years	O
of	O
operations	O
thanks	O
to	O
the	O
site	O
's	O
reliable	O
connection	O
to	O
the	O
national	O
grid	O
.	O
</s>
<s>
Half	O
of	O
LUMI	B-Device
's	O
capacity	O
belongs	O
to	O
the	O
EuroHPC	O
Joint	O
Undertaking	O
,	O
20%	O
of	O
which	O
is	O
reserved	O
for	O
industry	O
and	O
SME	O
use	O
.	O
</s>
<s>
The	O
other	O
half	O
is	O
shared	O
among	O
the	O
LUMI	B-Device
Consortium	O
countries	O
,	O
according	O
to	O
each	O
country	O
’s	O
financial	O
contribution	O
.	O
</s>
<s>
By	O
June	O
2021	O
pilot	O
projects	O
had	O
been	O
selected	O
for	O
the	O
first	O
run	O
of	O
the	O
CPU	O
partition	O
,	O
scheduled	O
for	O
September	O
2021	O
,	O
with	O
full	O
operations	O
including	O
the	O
GPU	B-Architecture
partition	O
planned	O
for	O
2022	O
.	O
</s>
<s>
The	O
word	O
"	O
lumi	B-Device
"	O
means	O
"	O
snow	O
"	O
in	O
Finnish	O
.	O
</s>
