<s>
Grid	B-Operating_System
MP	I-Operating_System
is	O
a	O
commercial	O
distributed	B-Architecture
computing	I-Architecture
software	O
package	O
developed	O
and	O
sold	O
by	O
Univa	B-General_Concept
(	O
formerly	O
known	O
as	O
United	B-Operating_System
Devices	I-Operating_System
)	O
,	O
a	O
privately	O
held	O
company	O
based	O
primarily	O
in	O
Austin	O
,	O
Texas	O
.	O
</s>
<s>
It	O
was	O
formerly	O
known	O
as	O
the	O
MetaProcessor	B-Operating_System
prior	O
to	O
the	O
release	O
of	O
version	O
4.0	O
,	O
however	O
the	O
letters	O
MP	O
in	O
Grid	B-Operating_System
MP	I-Operating_System
do	O
not	O
officially	O
stand	O
for	O
anything	O
.	O
</s>
<s>
Grid	B-Operating_System
MP	I-Operating_System
provides	O
job	B-General_Concept
scheduling	I-General_Concept
with	O
prioritization	O
,	O
user	O
security	O
restrictions	O
,	O
selective	O
application	O
exclusion	O
,	O
user-activity	O
detection	O
,	O
and	O
time-of-day	O
execution	O
controls	O
.	O
</s>
<s>
Grid	B-Operating_System
MP	I-Operating_System
can	O
be	O
used	O
to	O
manage	O
computational	O
Devices	O
consisting	O
of	O
corporate	O
desktop	O
PCs	O
,	O
departmental	O
servers	O
,	O
or	O
dedicated	O
cluster	O
nodes	O
.	O
</s>
<s>
Grid	B-Operating_System
MP	I-Operating_System
has	O
been	O
demonstrated	O
as	O
being	O
capable	O
of	O
managing	O
grids	O
of	O
large	O
numbers	O
of	O
nodes	O
during	O
its	O
use	O
in	O
the	O
infrastructure	O
of	O
the	O
grid.org	O
and	O
World	B-Operating_System
Community	I-Operating_System
Grid	I-Operating_System
projects	O
(	O
the	O
World	B-Operating_System
Community	I-Operating_System
Grid	I-Operating_System
project	O
migrated	O
to	O
the	O
open-source	B-Application
Berkeley	B-Operating_System
Open	I-Operating_System
Infrastructure	I-Operating_System
for	I-Operating_System
Network	I-Operating_System
Computing	I-Operating_System
software	O
in	O
2007	O
)	O
.	O
</s>
<s>
MP	O
Grid	O
Services	O
Interface	O
,	O
or	O
simply	O
MGSI	O
,	O
offers	O
a	O
web	O
service	O
API	B-General_Concept
(	O
via	O
SOAP	B-Application
and	O
XML-RPC	B-Protocol
protocols	O
over	O
HTTP	B-Protocol
)	O
.	O
</s>
<s>
Access	O
to	O
the	O
API	B-General_Concept
and	O
all	O
objects	O
is	O
access	O
controlled	O
and	O
security	O
restricted	O
on	O
a	O
per-object	O
basis	O
.	O
</s>
<s>
Since	O
MGSI	O
is	O
a	O
web	O
service	O
protocol	O
,	O
any	O
programming	O
language	O
that	O
has	O
a	O
SOAP	B-Application
or	O
XML-RPC	B-Protocol
library	B-Library
available	O
can	O
be	O
used	O
to	O
interface	O
with	O
it	O
,	O
although	O
commonly	O
C++	B-Language
,	O
Java	B-Language
,	O
Perl	B-Language
,	O
and	O
PHP	B-Application
are	O
used	O
.	O
</s>
<s>
The	O
MPMC	O
is	O
written	O
in	O
the	O
PHP	B-Application
programming	I-Application
language	I-Application
,	O
and	O
uses	O
the	O
MGSI	O
web	O
service	O
for	O
all	O
of	O
its	O
interactions	O
with	O
the	O
system	O
.	O
</s>
<s>
The	O
MP	O
Agent	O
(	O
known	O
as	O
the	O
UD	O
Agent	O
in	O
versions	O
before	O
4.0	O
)	O
is	O
the	O
software	B-General_Concept
agent	I-General_Concept
that	O
must	O
be	O
installed	O
on	O
each	O
computer	O
that	O
will	O
participate	O
in	O
a	O
Grid	B-Operating_System
MP	I-Operating_System
installation	O
by	O
running	O
jobs	O
.	O
</s>
<s>
Once	O
the	O
MP	O
Agent	O
is	O
installed	O
on	O
a	O
computer	O
,	O
it	O
is	O
officially	O
recognized	O
by	O
the	O
Grid	B-Operating_System
MP	I-Operating_System
as	O
a	O
Device	O
.	O
</s>
<s>
As	O
of	O
Grid	B-Operating_System
MP	I-Operating_System
Enterprise	O
version	O
5.5	O
,	O
the	O
MP	O
Agent	O
is	O
supported	O
on	O
the	O
following	O
platforms	O
:	O
</s>
