<s>
Dell	B-Device
EMC	I-Device
XtremIO	I-Device
is	O
Dell	O
EMC	O
’s	O
high-volume	O
,	O
high-capacity	O
all-flash	O
enterprise	O
storage	O
platform	O
.	O
</s>
<s>
It	O
also	O
targets	O
organizations	O
with	O
large	O
VDI	B-Protocol
deployments	O
.	O
</s>
<s>
They	O
were	O
originally	O
scalable	O
to	O
four	O
X-Bricks	O
,	O
linked	O
by	O
dual	O
InfiniBand	B-Architecture
,	O
delivering	O
1	O
million	O
IOPS	O
.	O
</s>
<s>
Up	O
to	O
8	O
X-Bricks	O
can	O
be	O
combined	O
into	O
a	O
single	O
cluster	O
with	O
a	O
raw	O
capacity	O
of	O
up	O
to	O
1.1	O
PB	O
,	O
which	O
the	O
company	O
claims	O
is	O
an	O
effective	O
capacity	O
of	O
5.5	O
PB	O
due	O
to	O
the	O
6:1	O
data	O
efficiency	O
ratio	O
achieved	O
through	O
what	O
it	O
calls	O
“	O
intelligent	O
data	O
packing.	O
”	O
X-Brick	O
interconnectivity	O
is	O
achieved	O
using	O
40Gbps	O
InfiniBand	B-Architecture
.	O
</s>
<s>
XtremIO	O
uses	O
remote	O
procedure	O
calls	O
(	O
RPC	O
)	O
for	O
control	O
messages	O
and	O
remote	B-General_Concept
direct	I-General_Concept
memory	I-General_Concept
access	I-General_Concept
(	O
RDMA	B-General_Concept
)	O
for	O
moving	O
data	O
blocks	O
.	O
</s>
<s>
The	O
full-mesh	O
RDMA	B-General_Concept
network	O
running	O
on	O
Infiniband	B-Architecture
maintains	O
a	O
consistent	O
path	O
length	O
to	O
each	O
data	O
block	O
,	O
which	O
in	O
turn	O
provides	O
the	O
same	O
latency	O
.	O
</s>
<s>
The	O
XIOS	O
operating	O
system	O
software	O
,	O
which	O
sits	O
on	O
top	O
of	O
a	O
Linux	O
kernel	O
inside	O
each	O
storage	O
controller	O
,	O
manages	O
the	O
system	O
's	O
functional	O
modules	O
,	O
RDMA	B-General_Concept
over	O
InfiniBand	B-Architecture
operations	O
,	O
monitoring	O
and	O
memory	O
pools	O
.	O
</s>
