<s>
The	O
P-GRADE	O
Grid	O
Portal	O
was	O
software	O
for	O
web	O
portals	O
to	O
manage	O
the	O
life-cycle	O
of	O
executing	O
a	O
parallel	O
application	O
in	O
grid	B-Architecture
computing	I-Architecture
.	O
</s>
<s>
It	O
was	O
developed	O
by	O
the	O
MTA	B-Operating_System
SZTAKI	I-Operating_System
Laboratory	I-Operating_System
of	I-Operating_System
Parallel	I-Operating_System
and	I-Operating_System
Distributed	I-Operating_System
Systems	I-Operating_System
(	O
LPDS	B-Operating_System
)	O
at	O
the	O
Hungarian	O
Academy	O
of	O
Sciences	O
,	O
Hungary	O
,	O
from	O
around	O
2005	O
through	O
2010	O
.	O
</s>
<s>
By	O
building	O
onto	O
the	O
GridSphere	O
portal	O
framework	O
,	O
the	O
P-GRADE	B-Operating_System
Portal	I-Operating_System
hides	O
details	O
of	O
grid	O
systems	O
with	O
high-level	O
interfaces	O
that	O
can	O
be	O
integrated	O
with	O
middleware	O
.	O
</s>
<s>
It	O
offers	O
portlet	B-Language
based	O
access	O
to	O
the	O
following	O
services	O
:	O
</s>
<s>
The	O
P-GRADE	B-Operating_System
Portal	I-Operating_System
allows	O
multi-user	O
development	O
and	O
execution	O
of	O
workflows	O
,	O
and	O
also	O
provides	O
support	O
for	O
workflow	O
level	O
grid	O
interoperation	O
.	O
</s>
<s>
The	O
portal	O
supports	O
middleware	O
technologies	O
including	O
Globus	O
Toolkit	O
,	O
European	O
Grid	O
Infrastructure	O
(	O
LCG	O
or	O
gLite	B-Operating_System
)	O
and	O
Advanced	B-Operating_System
Resource	I-Operating_System
Connector	I-Operating_System
.	O
</s>
<s>
The	O
P-GRADE	B-Operating_System
Portal	I-Operating_System
was	O
developed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
The	O
2.9	O
version	O
introduced	O
features	O
such	O
as	O
Portable	B-Application
Batch	I-Application
System	I-Application
(	O
PBS	O
)	O
and	O
Platform	B-Operating_System
LSF	I-Operating_System
cluster	O
support	O
,	O
EDGes	O
3G	O
Bridge	O
resource	O
support	O
,	O
local	O
PS	O
port	O
support	O
and	O
extended	O
NorduGrid	B-Operating_System
(	O
ARC	O
)	O
support	O
.	O
</s>
<s>
The	O
P-GRADE	B-Operating_System
Portal	I-Operating_System
served	O
grid	O
communities	O
in	O
research	O
and	O
industry	O
,	O
providing	O
access	O
to	O
Grids	O
including	O
:	O
</s>
<s>
and	O
others	O
,	O
listed	O
on	O
the	O
P-Grade	B-Operating_System
Portal	I-Operating_System
homepage	O
.	O
</s>
<s>
Application	O
specific	O
portals	O
can	O
be	O
created	O
by	O
adding	O
application	O
specific	O
portlets	B-Language
to	O
P-GRADE	B-Operating_System
portal	I-Operating_System
,	O
omitting	O
some	O
generic	O
purpose	O
portlets	B-Language
and	O
hiding	O
the	O
underlying	O
workflow	O
within	O
an	O
application	O
specific	O
portlet	B-Language
.	O
</s>
<s>
The	O
P-GRADE	B-Operating_System
Portal	I-Operating_System
environment	O
was	O
successfully	O
integrated	O
with	O
the	O
OMNeT++	O
simulation	O
framework	O
to	O
enable	O
large-scale	O
grid	O
resources	O
to	O
the	O
simulation	O
user	O
community	O
,	O
providing	O
significant	O
performance	O
increase	O
for	O
OMNeT++	O
-based	O
simulations	O
.	O
</s>
<s>
Since	O
2008	O
applications	O
were	O
listed	O
on	O
the	O
LPDS	B-Operating_System
Grid	O
Application	O
Support	O
Centre	O
web	O
site	O
.	O
</s>
