<s>
A	O
multisite	B-General_Concept
cloud	I-General_Concept
is	O
a	O
cloud	B-Architecture
composed	O
of	O
several	O
single	O
sites	O
(	O
or	O
data	B-Operating_System
centers	I-Operating_System
)	O
,	O
each	O
from	O
the	O
same	O
or	O
different	O
providers	O
and	O
explicitly	O
accessible	O
to	O
cloud	B-Architecture
users	I-Architecture
.	O
</s>
<s>
In	O
the	O
multisite	B-General_Concept
cloud	I-General_Concept
environment	O
,	O
the	O
tasks	O
of	O
a	O
program	O
or	O
a	O
workflow	O
should	O
be	O
scheduled	O
in	O
order	O
to	O
achieve	O
efficient	O
processing	O
.	O
</s>
