<s>
Pay-as-you-use	B-General_Concept
(	O
or	O
pay-per-use	O
)	O
is	O
a	O
payment	O
model	O
in	O
cloud	B-Architecture
computing	I-Architecture
that	O
charges	O
based	O
on	O
resource	O
usage	O
.	O
</s>
<s>
One	O
major	O
benefit	O
of	O
the	O
pay-as-you-use	B-General_Concept
method	O
is	O
that	O
there	O
are	O
no	O
wasted	O
resources	O
(	O
that	O
were	O
reserved	O
,	O
but	O
not	O
consumed	O
)	O
,	O
which	O
can	O
be	O
a	O
source	O
of	O
significant	O
losses	O
for	O
the	O
companies	O
.	O
</s>
<s>
Cost	O
efficiency	O
is	O
one	O
of	O
the	O
most	O
distinctive	O
and	O
advertised	O
benefits	O
of	O
cloud	B-Architecture
computing	I-Architecture
alongside	O
the	O
ease	O
of	O
use	O
.	O
</s>
<s>
Due	O
to	O
cloud	B-Architecture
computing	I-Architecture
rapid	O
development	O
,	O
the	O
utilized	O
payment	O
model	O
is	O
also	O
evolving	O
.	O
</s>
<s>
Pay-as-you-use	B-General_Concept
is	O
the	O
most	O
recent	O
payment	O
model	O
in	O
cloud	B-Architecture
computing	I-Architecture
that	O
emerged	O
after	O
integration	O
and	O
popularization	O
of	O
the	O
containers	O
in	B-Architecture
the	I-Architecture
clouds	I-Architecture
.	O
</s>
<s>
Pay-as-you-use	B-General_Concept
short	O
(	O
second	O
or	O
hour	O
)	O
Charged	O
for	O
the	O
consumed	O
resources	O
.	O
</s>
<s>
Right-sizing	O
is	O
a	O
process	O
of	O
reserving	O
the	O
cloud	B-Architecture
computing	I-Architecture
instances	O
(	O
containers	O
,	O
VMs	O
,	O
or	O
bare	O
metal	O
)	O
with	O
enough	O
resources	O
(	O
RAM	B-Architecture
,	O
CPU	B-Device
,	O
storage	O
,	O
network	O
)	O
to	O
achieve	O
a	O
sufficient	O
performance	O
at	O
the	O
lowest	O
cost	O
possible	O
.	O
</s>
<s>
Right-sizing	O
aims	O
to	O
solve	O
two	O
problems	O
in	O
cloud	B-Architecture
computing	I-Architecture
:	O
</s>
<s>
It	O
allows	O
avoiding	O
manual	O
prediction	O
on	O
the	O
required	O
server	O
size	O
by	O
shifting	O
this	O
responsibility	O
to	O
the	O
precise	O
tools	O
offered	O
by	O
modern	O
cloud	B-Architecture
hosting	I-Architecture
providers	O
.	O
</s>
<s>
Due	O
to	O
lack	O
of	O
unified	O
terminology	O
and	O
relative	O
novelty	O
,	O
the	O
pay-as-you-use	B-General_Concept
term	O
in	O
cloud	B-Architecture
computing	I-Architecture
is	O
often	O
confused	O
with	O
similar	O
ones	O
like	O
pay-as-you-go	O
,	O
pay-as-you-run	O
,	O
pay-as-you-allocate	O
,	O
etc	O
.	O
</s>
