<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
a	O
pilot	B-Operating_System
job	I-Operating_System
is	O
a	O
type	O
of	O
multilevel	O
scheduling	O
,	O
in	O
which	O
a	O
resource	O
is	O
acquired	O
by	O
an	O
application	O
so	O
that	O
the	O
application	O
can	O
schedule	O
work	O
into	O
that	O
resource	O
directly	O
,	O
rather	O
than	O
going	O
through	O
a	O
local	O
job	O
scheduler	O
,	O
which	O
might	O
lead	O
to	O
queue	O
waits	O
for	O
each	O
work	O
unit	O
.	O
</s>
<s>
This	O
term	O
comes	O
from	O
the	O
Condor	B-Operating_System
High-Throughput	I-Operating_System
Computing	I-Operating_System
System	I-Operating_System
,	O
in	O
which	O
Condor	O
GlideIns	O
provides	O
this	O
functionality	O
.	O
</s>
<s>
Other	O
examples	O
of	O
pilot	B-Operating_System
jobs	I-Operating_System
are	O
:	O
the	O
BigJob	O
implemented	O
in	O
SAGA	B-Operating_System
,	O
Swift	B-Language
Coasters	O
as	O
part	O
of	O
the	O
Swift	B-Language
parallel	O
scripting	O
system	O
,	O
the	O
Falkon	O
lightweight	O
task	O
execution	O
framework	O
,	O
and	O
HTCaaS	O
.	O
</s>
<s>
Pilot	B-Operating_System
jobs	I-Operating_System
are	O
most	O
often	O
used	O
on	O
systems	O
that	O
have	O
queues	O
,	O
as	O
part	O
of	O
their	O
purpose	O
is	O
,	O
in	O
some	O
sense	O
,	O
to	O
avoid	O
multiple	O
waits	O
in	O
these	O
queues	O
.	O
</s>
<s>
These	O
are	O
most	O
often	O
found	O
in	O
parallel	B-Operating_System
computing	I-Operating_System
systems	O
,	O
but	O
pilot	B-Operating_System
jobs	I-Operating_System
are	O
usually	O
part	O
of	O
a	O
distributed	B-Architecture
application	I-Architecture
,	O
and	O
are	O
many	O
times	O
associated	O
with	O
Many-task	B-Operating_System
computing	I-Operating_System
.	O
</s>
