<s>
LAM/MPI	B-Operating_System
is	O
one	O
of	O
the	O
predecessors	O
of	O
the	O
Open	B-Library
MPI	I-Library
project	O
.	O
</s>
<s>
Open	B-Library
MPI	I-Library
represents	O
a	O
community-driven	O
,	O
next	O
generation	O
implementation	O
of	O
a	O
Message	B-Application
Passing	I-Application
Interface	I-Application
(	O
MPI	O
)	O
fundamentally	O
designed	O
upon	O
a	O
component	O
architecture	O
to	O
make	O
an	O
extremely	O
powerful	O
platform	O
for	O
high-performance	B-Architecture
computing	I-Architecture
.	O
</s>
<s>
LAM/MPI	B-Operating_System
was	O
officially	O
retired	O
in	O
March	O
2015	O
.	O
</s>
<s>
LAM	O
(	O
Local	O
Area	O
Multicomputer	B-Operating_System
)	O
is	O
an	O
MPI	O
programming	O
environment	O
and	O
development	O
system	O
for	O
heterogeneous	O
computers	O
on	O
a	O
network	O
.	O
</s>
<s>
With	O
LAM/MPI	B-Operating_System
,	O
a	O
dedicated	O
computer	B-Architecture
cluster	I-Architecture
or	O
an	O
existing	O
network	O
computing	O
infrastructure	O
can	O
act	O
as	O
a	O
single	O
parallel	B-Operating_System
computing	I-Operating_System
resource	O
.	O
</s>
<s>
LAM/MPI	B-Operating_System
is	O
considered	O
to	O
be	O
"	O
cluster	O
friendly	O
"	O
,	O
in	O
that	O
it	O
offers	O
daemon-based	O
process	O
startup/control	O
as	O
well	O
as	O
fast	O
client-to-client	O
message	B-Architecture
passing	I-Architecture
protocols	O
.	O
</s>
<s>
LAM/MPI	B-Operating_System
can	O
use	O
TCP/IP	B-Protocol
,	O
shared	B-Operating_System
memory	I-Operating_System
,	O
Myrinet	B-General_Concept
(	O
GM	O
)	O
,	O
or	O
Infiniband	B-Architecture
(	O
mVAPI	O
)	O
for	O
message	B-Architecture
passing	I-Architecture
.	O
</s>
<s>
Compliant	O
applications	O
are	O
source	O
code	O
portable	O
between	O
LAM/MPI	B-Operating_System
and	O
any	O
other	O
implementation	O
of	O
MPI	O
.	O
</s>
<s>
In	O
addition	O
to	O
providing	O
a	O
high-quality	O
implementation	O
of	O
the	O
MPI	O
standard	O
,	O
LAM/MPI	B-Operating_System
offers	O
extensive	O
monitoring	O
capabilities	O
to	O
support	O
debugging	O
.	O
</s>
<s>
First	O
,	O
LAM/MPI	B-Operating_System
has	O
the	O
hooks	O
to	O
allow	O
a	O
snapshot	O
of	O
process	O
and	O
message	O
status	O
to	O
be	O
taken	O
at	O
any	O
time	O
during	O
an	O
application	O
run	O
.	O
</s>
