<s>
No	O
Remote	O
Memory	O
Access	O
(	O
abbreviated	O
as	O
NoRMA	B-General_Concept
)	O
is	O
a	O
computer	O
memory	B-General_Concept
architecture	I-General_Concept
for	O
multiprocessor	B-Operating_System
systems	O
,	O
given	O
its	O
name	O
by	O
.	O
</s>
<s>
In	O
a	O
NoRMA	B-General_Concept
architecture	O
,	O
the	O
address	O
space	O
globally	O
is	O
not	O
unique	O
and	O
the	O
memory	O
is	O
not	O
globally	O
accessible	O
by	O
the	O
processors	O
.	O
</s>
<s>
The	O
advantage	O
of	O
the	O
NoRMA	B-General_Concept
model	O
is	O
the	O
ability	O
to	O
construct	O
extremely	O
large	O
configurations	O
,	O
which	O
is	O
achieved	O
by	O
shifting	O
the	O
problem	O
to	O
the	O
user	O
configuration	O
.	O
</s>
<s>
Programs	O
for	O
NoRMA	B-General_Concept
architectures	O
need	O
to	O
evenly	O
partitioning	O
the	O
data	O
into	O
local	O
memory	O
modules	O
,	O
ensure	O
consistency	O
of	O
software	O
caches	O
to	O
enforce	O
the	O
desired	O
consistency	O
model	O
,	O
handle	O
transformations	O
of	O
data	O
identifiers	O
from	O
one	O
processor	O
's	O
address	O
space	O
to	O
another	O
,	O
and	O
realize	O
a	O
message-passing	O
system	O
for	O
remote	O
access	O
to	O
data	O
.	O
</s>
<s>
The	O
programming	O
model	O
of	O
Norma	B-General_Concept
architecture	O
is	O
therefore	O
extremely	O
complicated	O
.	O
</s>
