<s>
CloudSim	B-General_Concept
is	O
a	O
framework	O
for	O
modeling	O
and	O
simulation	O
of	O
cloud	B-Architecture
computing	I-Architecture
infrastructures	O
and	O
services	O
.	O
</s>
<s>
Originally	O
built	O
primarily	O
at	O
the	O
Cloud	B-Architecture
Computing	I-Architecture
and	O
Distributed	O
Systems	O
(	O
CLOUDS	O
)	O
Laboratory	O
,	O
the	O
University	O
of	O
Melbourne	O
,	O
Australia	O
,	O
CloudSim	B-General_Concept
has	O
become	O
one	O
of	O
the	O
most	O
popular	O
open	B-License
source	I-License
cloud	O
simulators	O
in	O
the	O
research	O
and	O
academia	O
.	O
</s>
<s>
CloudSim	B-General_Concept
is	O
completely	O
written	O
in	O
Java	O
.	O
</s>
<s>
The	O
latest	O
version	O
of	O
CloudSim	B-General_Concept
is	O
CloudSim	B-General_Concept
v6.0.0-beta	O
on	O
GitHub	B-Application
.	O
</s>
<s>
Initially	O
developed	O
as	O
a	O
stand-alone	O
cloud	O
simulator	O
,	O
CloudSim	B-General_Concept
has	O
further	O
been	O
extended	O
by	O
independent	O
researchers	O
.	O
</s>
<s>
CloudSim	B-General_Concept
Plus	O
is	O
a	O
totally	O
re-engineered	O
CloudSim	B-General_Concept
fork	O
providing	O
general-purpose	O
cloud	B-Architecture
computing	I-Architecture
simulation	O
and	O
exclusive	O
features	O
such	O
as	O
:	O
multi-cloud	O
simulations	O
,	O
vertical	O
and	O
horizontal	O
VM	O
scaling	O
,	O
host	O
fault	O
injection	O
and	O
recovery	O
,	O
joint	O
power	O
-	O
and	O
network-aware	O
simulations	O
and	O
more	O
.	O
</s>
<s>
Though	O
CloudSim	B-General_Concept
itself	O
does	O
not	O
have	O
a	O
graphical	O
user	O
interface	O
,	O
extensions	O
such	O
as	O
CloudReports	O
offer	O
a	O
GUI	O
for	O
CloudSim	B-General_Concept
simulations	O
.	O
</s>
<s>
CloudSimEx	O
extends	O
CloudSim	B-General_Concept
by	O
adding	O
MapReduce	B-Operating_System
simulation	O
capabilities	O
and	O
parallel	O
simulations	O
.	O
</s>
<s>
Cloud2Sim	O
extends	O
CloudSim	B-General_Concept
to	O
execute	O
on	O
multiple	O
distributed	O
servers	O
,	O
by	O
leveraging	O
Hazelcast	B-Application
distributed	O
execution	O
framework	O
.	O
</s>
<s>
RECAP	O
DES	O
extends	O
the	O
CloudSim	B-General_Concept
Plus	O
framework	O
to	O
model	O
synchronous	O
hierarchical	O
architectures	O
(	O
such	O
as	O
ElasticSearch	O
)	O
.	O
</s>
<s>
ThermoSim	O
extends	O
CloudSim	B-General_Concept
toolkit	O
by	O
incorporating	O
thermal	O
characteristics	O
,	O
and	O
uses	O
Deep	O
learning-based	O
temperature	O
predictor	O
for	O
cloud	O
nodes	O
.	O
</s>
