<s>
Exalogic	B-Application
is	O
a	O
computer	B-Architecture
appliance	I-Architecture
made	O
by	O
Oracle	B-Application
Corporation	I-Application
,	O
commercially	O
available	O
since	O
2010	O
.	O
</s>
<s>
It	O
is	O
a	O
cluster	B-Architecture
of	O
x86-64-servers	O
running	O
Oracle	B-Application
Linux	O
or	O
Solaris	B-Application
preinstalled	O
.	O
</s>
<s>
Its	O
full	O
trade	O
mark	O
is	O
Oracle	B-Application
Exalogic	I-Application
Elastic	O
Cloud	O
(	O
derived	O
from	O
the	O
SI	O
prefix	O
exa	O
-	O
and	O
-logic	O
,	O
probably	O
from	O
Weblogic	B-Language
)	O
,	O
positioned	O
by	O
the	O
vendor	O
as	O
a	O
preconfigured	O
clustered	O
application	O
server	O
to	O
use	O
for	O
cloud	B-Architecture
computing	I-Architecture
with	O
elastic	B-General_Concept
computing	I-General_Concept
abilities	O
.	O
</s>
<s>
Oracle	B-Application
Corporation	I-Application
announced	O
Exalogic	B-Application
at	O
the	O
Oracle	B-Application
OpenWorld	O
conference	O
in	O
San	O
Francisco	O
in	O
September	O
2010	O
.	O
</s>
<s>
The	O
company	O
presented	O
it	O
as	O
a	O
continuation	O
of	O
the	O
Oracle-engineered	O
systems	O
product-line	O
which	O
had	O
started	O
in	O
2008	O
with	O
Exadata	B-Device
(	O
preconfigured	O
database	O
cluster	B-Architecture
)	O
.	O
</s>
<s>
Exalogic	B-Application
is	O
a	O
factory	O
assembled	O
19-inch	B-Application
rack	I-Application
of	O
42	O
rack	O
units	O
,	O
completed	O
with	O
servers	B-Application
and	O
network	B-Device
equipment	I-Device
.	O
</s>
<s>
The	O
hardware	O
component	O
of	O
the	O
X2-2	O
appliance	O
consisted	O
of	O
:	O
a	O
group	O
of	O
1-unit	O
Intel	B-Device
Xeon	I-Device
servers	B-Application
,	O
each	O
equipped	O
with	O
two	O
six-core	O
2.93GHz	O
processors	O
and	O
two	O
solid-state	B-Device
drives	I-Device
for	O
operating	O
system	O
and	O
swap	O
space	O
;	O
a	O
common	O
storage	O
area	O
network	O
;	O
and	O
a	O
set	O
of	O
InfiniBand	B-Architecture
and	O
Ethernet	O
switches	O
.	O
</s>
<s>
Each	O
server	O
node	O
has	O
installed	O
96	O
GB	O
of	O
RAM	O
,	O
four	O
10	O
Gigabit	O
Ethernet	O
interfaces	O
,	O
and	O
a	O
double	O
InfiniBand	B-Architecture
port	O
.	O
</s>
<s>
Since	O
late	O
2013	O
an	O
X4-2	O
model	O
is	O
commercially	O
available	O
,	O
it	O
has	O
yet	O
more	O
processor	O
cores	O
and	O
four	O
times	O
as	O
large	O
capacity	O
of	O
solid-state	B-Device
drives	I-Device
.	O
</s>
<s>
The	O
latest	O
version	O
of	O
Exalogic	B-Application
compute	O
nodes	O
have	O
two	O
Intel	O
E5-2699v3	O
2.3GHz	O
Xeon	B-Device
(	O
18-core	O
)	O
processors	O
and	O
eight	O
32	O
GB	O
DDR4	O
2133MHz	O
RAM	O
for	O
a	O
total	O
of	O
256	O
GB	O
per	O
node	O
.	O
</s>
<s>
Two	O
64-bit	O
operating	O
systems	O
run	O
on	O
the	O
server	O
nodes	O
of	O
the	O
appliance	O
:	O
Oracle	B-Application
Linux	O
version	O
5.5	O
or	O
Solaris	B-Application
11	I-Application
.	O
</s>
<s>
All	O
servers	B-Application
have	O
an	O
installed	O
cluster	B-Architecture
configuration	O
of	O
Oracle	B-Language
WebLogic	I-Language
Server	I-Language
and	O
distributed	O
memory	O
cache	O
Oracle	B-Application
Coherence	I-Application
.	O
</s>
<s>
To	O
run	O
Java	O
applications	O
on	O
a	O
machine	O
there	O
is	O
a	O
choice	O
of	O
HotSpot	B-Language
or	O
JRockit	B-Language
.	O
</s>
<s>
Management	O
of	O
the	O
appliance	O
is	O
available	O
in	O
the	O
Oracle	B-Operating_System
Enterprise	I-Operating_System
Manager	I-Operating_System
toolset	O
,	O
which	O
is	O
also	O
pre-installed	O
in	O
the	O
appliance	O
.	O
</s>
<s>
A	O
transaction	O
monitor	O
Tuxedo	B-Application
is	O
optionally	O
supplied	O
.	O
</s>
<s>
Exalogic	B-Application
is	O
deployed	O
by	O
the	O
University	O
of	O
Melbourne	O
,	O
Food	O
and	O
Drug	O
Administration	O
(	O
FDA	O
)	O
in	O
the	O
United	O
States	O
,	O
Amway	O
,	O
the	O
Hyundai	O
Motor	O
Group	O
,	O
Bank	O
of	O
Chile	O
,	O
Haier	O
,	O
and	O
Deutsche	O
Post	O
DHL	O
,	O
Public	O
Authority	O
of	O
Minors	O
Affairs	O
(	O
PAMA	O
)	O
in	O
Kuwait	O
.	O
</s>
<s>
Mark	O
Benioff	O
,	O
founder	O
of	O
Salesforce.com,	O
presumes	O
that	O
any	O
appliance	O
principally	O
lacks	O
scalability	O
for	O
the	O
end-user	O
compared	O
with	O
the	O
infrastructure	B-General_Concept
,	I-General_Concept
supplied	I-General_Concept
as	I-General_Concept
service	I-General_Concept
,	O
and	O
notes	O
that	O
the	O
Exalogic	B-Application
approach	O
is	O
actually	O
a	O
rollback	O
to	O
the	O
obsolete	O
mainframe	B-Architecture
computer	I-Architecture
concept	O
.	O
</s>
<s>
Also	O
,	O
commentators	O
have	O
expressed	O
concerns	O
about	O
the	O
appropriateness	O
of	O
placing	O
the	O
word	O
"	O
elastic	O
"	O
in	O
the	O
name	O
,	O
because	O
,	O
despite	O
the	O
ability	O
to	O
load	O
balance	O
,	O
there	O
are	O
obvious	O
computing	O
limits	O
of	O
the	O
box	O
,	O
and	O
those	O
limits	O
cannot	O
be	O
transcended	O
like	O
they	O
should	O
be	O
in	O
a	O
true	O
elastic	O
environment	O
;	O
the	O
same	O
criticism	O
applies	O
to	O
all	O
solutions	O
designed	O
for	O
private	O
cloud	B-Architecture
computing	I-Architecture
,	O
in	O
particular	O
,	O
it	O
applies	O
to	O
EMC	O
Corporation	O
and	O
Hewlett-Packard	O
products	O
.	O
</s>
<s>
However	O
,	O
any	O
computing	O
environment	O
is	O
a	O
collection	O
of	O
servers	B-Application
,	O
and	O
since	O
many	O
Exalogic	B-Application
machines	O
can	O
be	O
combined	O
,	O
it	O
is	O
not	O
limited	O
to	O
the	O
single	O
box	O
capacity	O
,	O
which	O
may	O
be	O
considered	O
as	O
merely	O
a	O
building	O
block	O
.	O
</s>
