<s>
Consolidation	B-Algorithm
ratio	I-Algorithm
within	O
network	B-Architecture
infrastructure	I-Architecture
for	O
Internet	O
hosting	O
,	O
is	O
the	O
number	O
of	O
virtual	O
servers	O
that	O
can	O
run	O
on	O
each	O
physical	O
host	B-Operating_System
machine	I-Operating_System
.	O
</s>
<s>
Many	O
companies	O
arrive	O
at	O
that	O
figure	O
through	O
trial	O
and	O
error	O
by	O
stacking	O
virtual	B-Architecture
machines	I-Architecture
on	O
top	O
of	O
each	O
other	O
until	O
performance	O
slows	O
to	O
a	O
crawl	O
.	O
</s>
