<s>
Fast	B-Application
Virtual	I-Application
Disk	I-Application
(	O
better	O
known	O
as	O
FVD	O
)	O
is	O
a	O
virtualization-oriented	O
disk	B-Application
image	I-Application
file	O
format	O
developed	O
by	O
IBM	O
for	O
the	O
QEMU	B-Application
virtualization	B-General_Concept
platform	O
.	O
</s>
<s>
It	O
differs	O
from	O
existing	O
paravirtualization-centric	O
virtual	O
disk	B-Application
image	I-Application
formats	O
through	O
a	O
design	O
that	O
emphasizes	O
lack	O
of	O
contention	O
and	O
separation	O
of	O
concerns	O
between	O
the	O
host	O
and	O
guest	O
kernels	O
through	O
deduplication	O
of	O
filesystem	O
and	O
block	O
layer	O
storage	O
management	O
.	O
</s>
<s>
It	O
strives	O
to	O
maintain	O
similarity	O
to	O
raw	O
disk	O
layouts	O
,	O
eliminate	O
host	O
filesystem	O
and	O
disk	B-Application
image	I-Application
compression	O
overheads	O
,	O
and	O
minimize	O
metadata-related	O
overheads	O
.	O
</s>
