<s>
Integrity	B-Device
Virtual	I-Device
Machines	I-Device
is	O
software	O
from	O
Hewlett-Packard	O
that	O
allows	O
multiple	O
virtual	B-Architecture
machines	I-Architecture
to	O
run	O
concurrently	O
on	O
any	O
Itanium	B-General_Concept
server	B-Application
running	O
HP-UX	B-Application
,	O
notably	O
the	O
HPE	B-General_Concept
Integrity	I-General_Concept
Servers	I-General_Concept
line	O
.	O
</s>
<s>
It	O
is	O
part	O
of	O
HP	O
's	O
Virtual	O
Server	B-Application
Environment	O
suite	O
.	O
</s>
<s>
The	O
product	O
is	O
optimized	O
for	O
server	B-Application
use	O
.	O
</s>
<s>
Christophe	O
de	O
Dinechin	O
initiated	O
a	O
skunkworks	O
project	O
to	O
virtualize	O
Itanium	B-General_Concept
,	O
with	O
the	O
help	O
of	O
Jean-Marc	O
Chevrot	O
and	O
of	O
a	O
"	O
virtual	O
team	O
"	O
of	O
experienced	O
HP	O
engineers	O
.	O
</s>
<s>
A	O
prototype	O
of	O
Integrity	B-Device
Virtual	I-Device
Machines	I-Device
was	O
then	O
developed	O
between	O
2000	O
and	O
2003	O
by	O
Christophe	O
de	O
Dinechin	O
,	O
Todd	O
Kjos	O
and	O
Jonathan	O
Ross	O
.	O
</s>
<s>
It	O
was	O
then	O
turned	O
into	O
a	O
full-fledged	O
product	O
by	O
a	O
larger	O
team	O
of	O
experienced	O
OpenVMS	B-Operating_System
,	O
Tru64	B-Operating_System
Unix	I-Operating_System
and	O
HP-UX	B-Application
kernel	O
engineers	O
.	O
</s>
<s>
Version	O
1.0	O
and	O
1.2	O
,	O
released	O
in	O
2005	O
,	O
ran	O
HP-UX	B-Application
in	O
virtual	B-Architecture
machines	I-Architecture
.	O
</s>
<s>
Version	O
2.0	O
,	O
released	O
in	O
November	O
2006	O
,	O
additionally	O
supports	O
Windows	B-Application
Server	I-Application
2003	I-Application
,	O
CD	O
and	O
DVD	O
burners	O
,	O
tape	O
drives	O
and	O
VLAN	B-General_Concept
.	O
</s>
<s>
Version	O
3.5	O
,	O
released	O
in	O
late	O
2007	O
,	O
supports	O
SUSE	O
Linux	B-Application
Enterprise	B-Application
Server	I-Application
,	O
HP-UX	B-Application
11i	O
v3	O
guests	O
,	O
new	O
service	O
packs	O
for	O
Windows	B-Application
and	O
Linux	B-Application
guests	O
,	O
and	O
accelerated	O
virtual	O
I/O	O
for	O
HP-UX	B-Application
guests	O
,	O
enabling	O
better	O
I/O	O
performance	O
and	O
a	O
larger	O
number	O
of	O
devices	O
.	O
</s>
<s>
Version	O
4.0	O
,	O
released	O
in	O
September	O
2008	O
,	O
runs	O
on	O
HP-UX	B-Application
11.31	O
(	O
also	O
known	O
as	O
11i	O
v3	O
)	O
,	O
supports	O
8	O
virtual	O
CPUs	O
,	O
capped	O
CPU	O
allocation	O
(	O
in	O
addition	O
to	O
CPU	O
entitlement	O
as	O
in	O
previous	O
releases	O
)	O
,	O
additional	O
support	O
for	O
accelerated	O
virtual	O
I/O	O
(	O
AVIO	O
)	O
,	O
and	O
a	O
new	O
VM	O
performance	O
analysis	O
tool	O
.	O
</s>
<s>
Version	O
4.0	O
also	O
includes	O
beta	O
functionality	O
such	O
as	O
on-line	O
migration	O
and	O
support	O
for	O
OpenVMS	B-Operating_System
guests	O
.	O
</s>
<s>
It	O
also	O
provides	O
support	O
for	O
SSH	O
third-party	O
alternatives	O
for	O
secure	O
communications	O
,	O
accelerated	O
virtual	O
I/O	O
(	O
AVIO	O
)	O
for	O
networking	O
on	O
Windows	B-Application
and	O
Linux	B-Application
guests	O
,	O
support	O
for	O
ignite	O
and	O
VxVM	O
backing	O
stores	O
.	O
</s>
<s>
Version	O
4.2	O
,	O
released	O
March	O
2010	O
,	O
supports	O
encryption	O
during	O
a	O
VM	O
migration	O
,	O
brings	O
support	O
for	O
newer	O
Itanium	B-General_Concept
hardware	O
and	O
VM	O
Guest	O
OS	O
versions	O
,	O
contains	O
software	O
allowing	O
for	O
VMs	B-Operating_System
as	O
Serviceguard	B-Application
packages	O
and	O
Serviceguard	B-Application
Nodes	O
,	O
and	O
support	O
for	O
automatic	O
memory	O
reallocation	O
.	O
</s>
<s>
It	O
also	O
added	O
support	O
for	O
OpenVMS	B-Operating_System
8.4	O
guests	O
.	O
</s>
<s>
Version	O
4.2.5	O
,	O
released	O
September	O
2010	O
,	O
brings	O
support	O
for	O
the	O
HP	B-Device
Integrity	I-Device
Superdome	I-Device
2	I-Device
,	O
as	O
well	O
as	O
suspend	O
and	O
resume	O
support	O
for	O
a	O
VM	O
.	O
</s>
<s>
Version	O
4.3	O
,	O
released	O
March	O
2011	O
,	O
brings	O
support	O
for	O
the	O
Intel®	B-General_Concept
Itanium®	I-General_Concept
Tukwila	I-General_Concept
processor	I-General_Concept
,	O
an	O
NVRAM	O
Edit	O
utility	O
,	O
a	O
Virtual	O
iLO	O
Remote	O
Console	O
,	O
16	O
virtual	O
CPUs	O
for	O
guests	O
,	O
128GB	O
for	O
guest	O
memory	O
,	O
256	O
AVIO	O
storage	O
devices	O
,	O
the	O
support	O
for	O
Fiber	B-Protocol
Channel	I-Protocol
over	I-Protocol
Ethernet	I-Protocol
,	O
and	O
the	O
support	O
of	O
NFS	B-Protocol
backing	O
stores	O
.	O
</s>
<s>
Version	O
6.3.5	O
,	O
released	O
March	O
2015	O
enables	O
dynamic	O
deletion	O
of	O
I/O	O
devices	O
,	O
improvements	O
to	O
what	O
physical	O
ports	O
NPIV	O
guests	O
use	O
after	O
they	O
're	O
migrated	O
,	O
reduced	O
memory	O
overhead	O
for	O
large	O
VMs	B-Operating_System
,	O
and	O
more	O
.	O
</s>
<s>
The	O
host	O
configurations	O
are	O
the	O
same	O
as	O
those	O
supported	O
by	O
HP-UX	B-Application
,	O
and	O
can	O
include	O
128	O
physical	O
cores	O
and	O
1TB	O
of	O
main	O
memory	O
.	O
</s>
<s>
Guests	O
can	O
have	O
multiple	B-Operating_System
virtual	I-Operating_System
CPUs	I-Operating_System
,	O
the	O
maximum	O
number	O
in	O
supported	O
configurations	O
being	O
4	O
with	O
releases	O
before	O
4.0	O
,	O
then	O
8	O
with	O
release	O
4.0	O
,	O
16	O
with	O
release	O
4.3	O
,	O
and	O
32	O
with	O
6.3	O
.	O
</s>
<s>
In	O
recent	O
releases	O
,	O
memory	O
can	O
be	O
adjusted	O
dynamically	O
for	O
HP-UX	B-Application
guests	O
.	O
</s>
<s>
The	O
CPU	O
allocation	O
for	O
virtual	B-Architecture
machines	I-Architecture
can	O
be	O
adjusted	O
dynamically	O
with	O
a	O
granularity	O
of	O
1%	O
or	O
1MHz	O
.	O
</s>
<s>
CPU	O
time	O
is	O
allocated	O
by	O
a	O
fair-share	B-Operating_System
scheduler	I-Operating_System
,	O
which	O
delivers	O
better	O
CPU	O
utilization	O
for	O
SMP	B-Operating_System
guests	O
than	O
a	O
more	O
simplistic	O
gang	B-Operating_System
scheduler	I-Operating_System
.	O
</s>
<s>
Integrity	B-Device
Virtual	I-Device
Machines	I-Device
can	O
be	O
created	O
and	O
managed	O
using	O
a	O
command-line	B-Application
interface	I-Application
or	O
a	O
graphical	B-Application
user	I-Application
interface	I-Application
accessed	O
using	O
a	O
web	B-Application
browser	I-Application
.	O
</s>
<s>
The	O
user	O
interface	O
is	O
integrated	O
in	O
the	O
HP	B-Device
Integrity	I-Device
Virtual	I-Device
Machines	I-Device
Manager	O
.	O
</s>
