<s>
Within	O
cluster	B-Architecture
and	O
parallel	B-Operating_System
computing	I-Operating_System
,	O
a	O
cluster	B-Operating_System
manager	I-Operating_System
is	O
usually	O
backend	O
graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
or	O
command-line	O
interface	O
(	O
CLI	O
)	O
software	O
that	O
runs	O
on	O
a	O
set	O
of	O
cluster	B-Architecture
nodes	O
that	O
it	O
manages	O
(	O
in	O
some	O
cases	O
it	O
runs	O
on	O
a	O
different	O
server	O
or	O
cluster	B-Architecture
of	O
management	O
servers	O
)	O
.	O
</s>
<s>
The	O
cluster	B-Operating_System
manager	I-Operating_System
works	O
together	O
with	O
a	O
cluster	B-Operating_System
management	I-Operating_System
agent	O
.	O
</s>
<s>
These	O
agents	O
run	O
on	O
each	O
node	O
of	O
the	O
cluster	B-Architecture
to	O
manage	O
and	O
configure	O
services	O
,	O
a	O
set	O
of	O
services	O
,	O
or	O
to	O
manage	O
and	O
configure	O
the	O
complete	O
cluster	B-Architecture
server	I-Architecture
itself	O
(	O
see	O
super	B-Architecture
computing	I-Architecture
.	O
)	O
</s>
<s>
In	O
some	O
cases	O
the	O
cluster	B-Operating_System
manager	I-Operating_System
is	O
mostly	O
used	O
to	O
dispatch	O
work	O
for	O
the	O
cluster	B-Architecture
(	O
or	O
cloud	B-Architecture
)	O
to	O
perform	O
.	O
</s>
<s>
In	O
this	O
last	O
case	O
a	O
subset	O
of	O
the	O
cluster	B-Operating_System
manager	I-Operating_System
can	O
be	O
a	O
remote	O
desktop	O
application	O
that	O
is	O
used	O
not	O
for	O
configuration	O
but	O
just	O
to	O
send	O
work	O
and	O
get	O
back	O
work	O
results	O
from	O
a	O
cluster	B-Architecture
.	O
</s>
<s>
In	O
other	O
cases	O
the	O
cluster	B-Architecture
is	O
more	O
related	O
to	O
availability	O
and	O
load	B-Application
balancing	I-Application
than	O
to	O
computational	O
or	O
specific	O
service	O
clusters	O
.	O
</s>
