<s>
FlexiScale	B-General_Concept
is	O
a	O
utility	B-Operating_System
computing	I-Operating_System
platform	O
launched	O
by	O
XCalibre	O
Communications	O
in	O
the	O
summer	O
of	O
2007	O
,	O
and	O
subsequently	O
acquired	O
by	O
Flexiant	O
.	O
</s>
<s>
Launched	O
shortly	O
after	O
Amazon	B-General_Concept
's	I-General_Concept
EC2	I-General_Concept
service	I-General_Concept
,	O
it	O
was	O
Europe	O
's	O
first	O
and	O
the	O
world	O
's	O
second	O
cloud	B-Architecture
computing	I-Architecture
platform	I-Architecture
.	O
</s>
<s>
Users	O
are	O
able	O
to	O
create	O
,	O
start	O
,	O
and	O
stop	O
servers	B-Application
as	O
they	O
require	O
allowing	O
rapid	O
deployment	O
where	O
needed	O
.	O
</s>
<s>
Both	O
Windows	O
and	O
Linux	B-Application
are	O
supported	O
on	O
the	O
FlexiScale	B-General_Concept
platform	O
.	O
</s>
<s>
FlexiScale	B-General_Concept
uses	O
the	O
open	B-License
source	I-License
Xen	B-Operating_System
hypervisor	I-Operating_System
.	O
</s>
<s>
The	O
storage	O
system	O
previously	O
consisted	O
of	O
a	O
dual	O
head	O
NetApp	B-Operating_System
storage	I-Operating_System
array	I-Operating_System
with	O
the	O
disk	O
shelves	O
connected	O
to	O
both	O
heads	O
.	O
</s>
<s>
This	O
was	O
replaced	O
with	O
the	O
launch	O
of	O
FlexiScale	B-General_Concept
2.0	O
in	O
June	O
2010	O
with	O
an	O
"	O
Amber	O
Road	O
"	O
based	O
storage	O
solution	O
from	O
Sun	O
Microsystems	O
.	O
</s>
<s>
There	O
have	O
been	O
a	O
few	O
revisions	O
of	O
the	O
FlexiScale	B-General_Concept
platform	O
,	O
from	O
publicly	O
available	O
information	O
the	O
first	O
version	O
was	O
based	O
on	O
the	O
Virtual	O
Iron	O
VM	B-Architecture
management	O
software	O
.	O
</s>
<s>
The	O
second	O
revision	O
(	O
called	O
FlexiScale	B-General_Concept
v1.5	O
)	O
of	O
the	O
platform	O
was	O
based	O
on	O
a	O
in-house	O
developed	O
VM	B-Architecture
control	O
system	O
,	O
now	O
known	O
as	O
Extility	O
.	O
</s>
<s>
The	O
most	O
recent	O
release	O
(	O
called	O
FlexiScale	B-General_Concept
v2.0	O
)	O
contributed	O
an	O
extensively	O
revised	O
User	O
Interface	O
.	O
</s>
