<s>
DIET	O
is	O
a	O
software	O
for	O
grid-computing	B-Architecture
.	O
</s>
<s>
As	O
middleware	B-General_Concept
,	O
DIET	O
sits	O
between	O
the	O
operating	B-General_Concept
system	I-General_Concept
(	O
which	O
handles	O
the	O
details	O
of	O
the	O
hardware	B-Architecture
)	O
and	O
the	O
application	B-Application
software	I-Application
(	O
which	O
deals	O
with	O
the	O
specific	O
computational	O
task	O
at	O
hand	O
)	O
.	O
</s>
<s>
It	O
was	O
designed	O
for	O
high-performance	B-Architecture
computing	I-Architecture
.	O
</s>
<s>
It	O
is	O
currently	O
developed	O
by	O
INRIA	O
,	O
École	O
Normale	O
Supérieure	O
de	O
Lyon	O
,	O
CNRS	B-Application
,	O
Claude	O
Bernard	O
University	O
Lyon	O
1	O
,	O
SysFera	O
.	O
</s>
<s>
It	O
is	O
open-source	B-Application
software	I-Application
released	O
under	O
the	O
CeCILL	B-License
license	I-License
.	O
</s>
<s>
Like	O
NetSolve/GridSolve	O
and	O
Ninf	O
,	O
DIET	O
is	O
compliant	O
with	O
the	O
GridRPC	B-Operating_System
standard	O
from	O
the	O
Open	O
Grid	B-Architecture
Forum	O
.	O
</s>
<s>
The	O
distributed	O
resources	O
are	O
managed	O
in	O
a	O
transparent	O
way	O
through	O
the	O
middleware	B-General_Concept
.	O
</s>
<s>
It	O
can	O
work	O
with	O
workstations	O
,	O
clusters	B-Architecture
,	O
Grids	B-Architecture
and	O
clouds	B-Architecture
.	O
</s>
<s>
DIET	O
is	O
used	O
to	O
manage	O
the	O
Décrypthon	B-Operating_System
Grid	B-Architecture
installed	O
by	O
IBM	O
in	O
six	O
French	O
universities	O
(	O
Bordeaux	O
1	O
,	O
Lille	O
1	O
,	O
Paris	O
6	O
,	O
ENS	O
Lyon	O
,	O
Crihan	O
in	O
Rouen	O
,	O
Orsay	O
)	O
.	O
</s>
<s>
Usually	O
,	O
GridRPC	B-Operating_System
environments	O
have	O
five	O
different	O
components	O
:	O
clients	O
that	O
submit	O
problems	O
to	O
servers	O
,	O
servers	O
that	O
solve	O
the	O
problems	O
sent	O
by	O
clients	O
,	O
a	O
database	O
that	O
contains	O
information	O
about	O
software	O
and	O
hardware	B-Architecture
resources	O
,	O
a	O
scheduler	O
that	O
chooses	O
an	O
appropriate	O
server	O
depending	O
on	O
the	O
problem	O
sent	O
and	O
the	O
information	O
contained	O
in	O
the	O
database	O
,	O
and	O
monitors	O
that	O
get	O
information	O
about	O
the	O
status	O
of	O
the	O
computational	O
resources	O
.	O
</s>
<s>
This	O
approach	O
was	O
based	O
on	O
the	O
JXTA-J2SE	O
toolbox	O
for	O
the	O
on-demand	O
discovery	O
and	O
connection	O
of	O
MAs	O
.	O
</s>
<s>
DIET	O
provides	O
an	O
interface	O
with	O
several	O
existing	O
LRMS	O
to	O
execute	O
jobs	O
:	O
LoadLeveler	O
(	O
on	O
IBM	O
resources	O
)	O
,	O
OpenPBS	B-Application
(	O
a	O
fork	O
of	O
the	O
well-known	O
PBS	B-Application
system	O
)	O
,	O
and	O
OAR	B-Architecture
(	O
the	O
batch	O
scheduler	O
used	O
by	O
the	O
research	O
grid	B-Architecture
,	O
developed	O
by	O
IMAG	O
at	O
Grenoble	O
)	O
.	O
</s>
<s>
Eucalyptus	B-General_Concept
,	O
which	O
is	O
open-source	B-Application
software	I-Application
developed	O
by	O
the	O
University	O
of	O
California	O
,	O
Santa	O
Barbara	O
.	O
</s>
<s>
Amazon	B-General_Concept
Elastic	I-General_Concept
Compute	I-General_Concept
Cloud	I-General_Concept
,	O
which	O
is	O
commercial	O
software	O
part	O
of	O
com	O
's	O
cloud	B-Architecture
computing	I-Architecture
services	O
.	O
</s>
