<s>
DiaGrid	B-Operating_System
is	O
a	O
large	O
,	O
multicampus	O
distributed	B-Architecture
research	O
computing	O
network	O
utilizing	O
the	O
HTCondor	B-Operating_System
system	O
and	O
centered	O
at	O
Purdue	O
University	O
in	O
West	O
Lafayette	O
,	O
Indiana	O
.	O
</s>
<s>
DiaGrid	B-Operating_System
received	O
a	O
Campus	O
Technology	O
Innovators	O
Award	O
from	O
Campus	O
Technology	O
magazine	O
and	O
an	O
IDG	O
InfoWorld	O
100	O
Award	O
in	O
2009	O
and	O
was	O
employed	O
at	O
the	O
SC09	O
supercomputing	O
conference	O
in	O
Portland	O
,	O
Ore.	O
,	O
to	O
capture	O
nearly	O
150	O
days	O
of	O
compute	O
time	O
for	O
science	O
jobs	O
.	O
</s>
<s>
DiaGrid	B-Operating_System
is	O
a	O
partnership	O
with	O
Purdue	O
,	O
Indiana	O
University	O
,	O
Indiana	O
State	O
University	O
,	O
the	O
University	O
of	O
Notre	O
Dame	O
,	O
the	O
University	O
of	O
Louisville	O
,	O
the	O
University	O
of	O
Nebraska	O
,	O
the	O
University	O
of	O
Wisconsin	O
,	O
Purdue	O
's	O
Calumet	O
and	O
North	O
Central	O
campuses	O
,	O
and	O
Indiana	O
University-Purdue	O
University	O
Fort	O
Wayne	O
.	O
</s>
<s>
DiaGrid	B-Operating_System
is	O
managed	O
by	O
Information	O
Technology	O
at	O
Purdue	O
(	O
ITaP	O
)	O
,	O
the	O
central	O
information	O
technology	O
organization	O
at	O
Purdue	O
's	O
West	O
Lafayette	O
campus	O
,	O
and	O
ITaP	O
's	O
research	O
computing	O
unit	O
the	O
Rosen	O
Center	O
for	O
Advanced	O
Computing	O
,	O
which	O
also	O
operates	O
the	O
Steele	B-Device
,	O
Coates	B-Device
,	O
Rossmann	O
,	O
Hansen	O
and	O
Carter	O
cluster	O
supercomputers	O
.	O
</s>
<s>
Through	O
HTCondor	B-Operating_System
,	O
developed	O
at	O
the	O
University	O
of	O
Wisconsin	O
,	O
DiaGrid	B-Operating_System
harvests	O
and	O
manages	O
computing	O
cycles	O
from	O
idle	O
or	O
underused	O
high-performance	O
computing	O
cluster	O
nodes	O
,	O
servers	O
,	O
machines	O
in	O
campus	O
computer	O
and	O
other	O
labs	O
,	O
and	O
office	O
computers	O
.	O
</s>
<s>
Whenever	O
a	O
local	O
user	O
or	O
scheduled	O
job	O
needs	O
a	O
given	O
machine	O
,	O
the	O
HTCondor	B-Operating_System
job	O
is	O
stopped	O
and	O
automatically	O
sent	O
to	O
another	O
HTCondor	B-Operating_System
node	O
as	O
soon	O
as	O
possible	O
.	O
</s>
<s>
While	O
this	O
"	O
opportunistic	O
"	O
model	O
limits	O
the	O
ability	O
to	O
do	O
parallel	B-Operating_System
processing	I-Operating_System
and	O
communications	O
,	O
a	O
HTCondor	B-Operating_System
pool	O
can	O
provide	O
smaller	O
,	O
serial	O
jobs	O
vast	O
numbers	O
of	O
cycles	O
in	O
a	O
very	O
short	O
amount	O
of	O
time	O
.	O
</s>
<s>
HTCondor	B-Operating_System
—	O
and	O
by	O
extension	O
,	O
DiaGrid	B-Operating_System
—	O
is	O
designed	O
for	O
high-throughput	B-Operating_System
computing	I-Operating_System
and	O
is	O
excellent	O
for	O
parameter	O
sweeps	O
,	O
Monte	B-Algorithm
Carlo	I-Algorithm
simulation	I-Algorithm
,	O
or	O
nearly	O
any	O
serial	O
application	O
.	O
</s>
<s>
Some	O
classes	O
of	O
parallel	O
jobs	O
(	O
master-worker	O
)	O
may	O
be	O
run	O
effectively	O
via	O
HTCondor	B-Operating_System
as	O
well	O
.	O
</s>
<s>
To	O
pool	O
computational	O
resources	O
spread	O
around	O
Indiana	O
and	O
the	O
Midwest	O
,	O
DiaGrid	B-Operating_System
takes	O
advantage	O
of	O
I-Light	O
,	O
the	O
high-speed	O
fiber-optic	O
state	O
network	O
connecting	O
Indiana	O
campuses	O
to	O
each	O
other	O
,	O
the	O
Internet	O
and	O
national	O
research	O
networks	O
such	O
as	O
the	O
Internet2	O
and	O
National	O
LambdaRail	O
.	O
</s>
<s>
DiaGrid	B-Operating_System
provides	O
computational	O
resources	O
to	O
researchers	O
on	O
both	O
the	O
Open	O
Science	O
Grid	O
and	O
the	O
U.S.	O
National	O
Science	O
Foundation	O
's	O
Extreme	O
Science	O
and	O
Engineering	O
Discovery	O
Environment	O
system	O
(	O
formerly	O
TeraGrid	B-Operating_System
)	O
.	O
</s>
<s>
DiaGrid	B-Operating_System
and	O
BoilerGrid	O
have	O
been	O
used	O
by	O
researchers	O
at	O
Purdue	O
and	O
elsewhere	O
for	O
a	O
variety	O
of	O
purposes	O
,	O
such	O
as	O
imaging	O
the	O
structure	O
of	O
viruses	B-Application
at	O
near-atomic	O
resolutions	O
,	O
simulating	O
the	O
early	O
stages	O
of	O
the	O
Solar	O
System	O
's	O
formation	O
,	O
projecting	O
the	O
reliability	O
of	O
Indiana	O
's	O
electrical	O
supply	O
,	O
modeling	O
the	O
spread	O
of	O
water	O
pollutants	O
,	O
discerning	O
the	O
structure	O
of	O
protein	O
molecules	O
and	O
identifying	O
millions	O
of	O
potential	O
new	O
forms	O
of	O
zeolites	O
,	O
silicate	O
minerals	O
widely	O
used	O
to	O
catalyze	O
chemical	O
reactions	O
on	O
an	O
industrial	O
scale	O
.	O
</s>
<s>
DiaGrid	B-Operating_System
also	O
is	O
being	O
used	O
to	O
develop	O
data	O
processing	O
techniques	O
for	O
the	O
Large	O
Synoptic	O
Survey	O
Telescope	O
.	O
</s>
<s>
Purdue	O
added	O
a	O
Web-based	O
portal	O
for	O
BLAST	B-Application
processing	O
with	O
DiaGrid	B-Operating_System
in	O
2011	O
.	O
</s>
