<s>
Oracle	B-Operating_System
Enterprise	I-Operating_System
Manager	I-Operating_System
(	O
OEM	O
)	O
is	O
a	O
set	O
of	O
web-based	O
tools	O
aimed	O
at	O
managing	O
software	B-Application
and	O
hardware	B-Architecture
produced	O
by	O
Oracle	B-Application
Corporation	I-Application
as	O
well	O
as	O
by	O
some	O
non-Oracle	O
entities	O
.	O
</s>
<s>
Oracle	B-Operating_System
Enterprise	I-Operating_System
Manager	I-Operating_System
includes	O
three	O
releases	O
:	O
</s>
<s>
Oracle	B-Operating_System
Enterprise	I-Operating_System
Manager	I-Operating_System
Database	O
Control	O
,	O
the	O
oldest	O
and	O
arguably	O
the	O
best-known	O
release	O
,	O
aims	O
to	O
manage	O
Oracle	B-General_Concept
databases	I-General_Concept
.	O
</s>
<s>
It	O
originated	O
as	O
a	O
Java	B-Device
client	B-Protocol
able	O
to	O
configure	O
and	O
manage	O
databases	B-Application
.	O
</s>
<s>
Oracle	B-Language
Application	I-Language
Server	I-Language
also	O
has	O
a	O
web-interface	O
to	O
manage	O
the	O
application	O
server	O
.	O
</s>
<s>
To	O
manage	O
many	O
databases	B-Application
and	O
application	O
servers	O
(	O
according	O
to	O
Oracle	B-Application
Corporation	I-Application
,	O
preferably	O
in	O
a	O
grid	B-Architecture
solution	O
)	O
,	O
the	O
Oracle	B-Operating_System
Enterprise	I-Operating_System
Manager	I-Operating_System
Grid	B-Architecture
Control	O
can	O
be	O
used	O
.	O
</s>
<s>
It	O
can	O
manage	O
multiple	O
instances	O
of	O
Oracle	B-General_Concept
deployment	O
platforms	B-Device
;	O
the	O
most	O
recent	O
edition	O
also	O
allows	O
for	O
management	O
and	O
monitoring	O
of	O
other	O
platforms	B-Device
such	O
as	O
Microsoft	O
.NET	O
,	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
,	O
NetApp	B-Operating_System
filers	I-Operating_System
,	O
BEA	B-Language
Weblogic	I-Language
and	O
others	O
.	O
</s>
<s>
Partners	O
and	O
IT	O
organizations	O
can	O
build	O
extensions	O
to	O
Oracle	B-Operating_System
Enterprise	I-Operating_System
Manager	I-Operating_System
,	O
and	O
make	O
them	O
available	O
to	O
other	O
Enterprise	O
Manager	O
users	O
via	O
an	O
Oracle	B-General_Concept
hosted	O
web	O
site	O
called	O
Oracle	B-Operating_System
Enterprise	I-Operating_System
Manager	I-Operating_System
Extensibility	O
Exchange	O
.	O
</s>
<s>
System	B-Application
monitoring	I-Application
features	O
include	O
monitoring	O
functionality	O
that	O
supports	O
detection	O
and	O
notification	O
of	O
impending	O
IT	O
problems	O
.	O
</s>
<s>
It	O
monitors	O
Oracle	B-General_Concept
Database	I-General_Concept
instances	O
,	O
Oracle	B-General_Concept
Real	B-Operating_System
Application	I-Operating_System
Clusters	I-Operating_System
,	O
and	O
Oracle	B-Language
Application	I-Language
Server	I-Language
Farms	O
and	O
Clusters	O
.	O
</s>
<s>
OEM	O
Grid	B-Architecture
Control	O
comes	O
with	O
a	O
set	O
of	O
performance	O
and	O
health	O
metrics	O
that	O
allow	O
monitoring	O
of	O
technology	O
components	O
such	O
as	O
applications	O
,	O
application	O
servers	O
,	O
databases	B-Application
,	O
as	O
well	O
as	O
the	O
back-end	O
components	O
on	O
which	O
they	O
rely	O
,	O
such	O
as	O
hosts	O
,	O
operating	O
systems	O
and	O
storage	O
.	O
</s>
<s>
The	O
architecture	O
of	O
the	O
OEM	O
for	O
Grid	B-Architecture
Control	O
has	O
three	O
distinct	O
components	O
:	O
</s>
<s>
The	O
OMA	O
runs	O
on	O
the	O
target	O
host	O
and	O
collects	O
information	O
on	O
the	O
hardware	B-Architecture
,	O
operating	O
system	O
,	O
and	O
applications	O
that	O
run	O
on	O
the	O
target	O
.	O
</s>
<s>
The	O
OMS	O
pulls	O
the	O
information	O
from	O
the	O
OMAs	O
and	O
aggregates	O
the	O
collections	O
into	O
the	O
repository	B-Application
.	O
</s>
<s>
The	O
OMS	O
also	O
acts	O
as	O
the	O
user-interface	O
—	O
by	O
generating	O
web-pages	O
for	O
database	B-General_Concept
administrators	I-General_Concept
to	O
view	O
the	O
status	O
of	O
systems	O
and	O
services	O
.	O
</s>
<s>
The	O
OMR	O
comprises	O
an	O
instance	O
of	O
the	O
Oracle	B-General_Concept
database	I-General_Concept
that	O
stores	O
the	O
data	O
collected	O
by	O
the	O
OMS	O
.	O
</s>
<s>
Installers	O
can	O
make	O
the	O
OMR	O
highly	O
available	O
or	O
fault-tolerant	B-General_Concept
by	O
running	O
it	O
on	O
an	O
Oracle	B-Operating_System
RAC	I-Operating_System
instance	O
across	O
multiple	O
nodes	O
.	O
</s>
<s>
Oracle	B-Operating_System
Enterprise	I-Operating_System
Manager	I-Operating_System
continues	O
to	O
expand	O
its	O
monitoring	O
scope	O
by	O
offering	O
management	O
plug-ins	O
for	O
non-Oracle	O
components	O
,	O
that	O
are	O
both	O
Oracle-developed	O
and	O
developed	O
in	O
partnership	O
by	O
third-party	O
vendors	O
.	O
</s>
<s>
For	O
example	O
,	O
Plug-ins	O
for	O
Veritas	B-Application
Storage	I-Application
Foundation	I-Application
,	O
VMWare	B-Application
vSphere	I-Application
,	O
and	O
EMC	B-Operating_System
Clariion	I-Operating_System
are	O
available	O
.	O
</s>
<s>
Key	O
features	O
of	O
OEM	O
Grid	B-Architecture
Control	O
:	O
</s>
<s>
Oracle	B-Operating_System
Enterprise	I-Operating_System
Manager	I-Operating_System
performs	O
much	O
of	O
its	O
activity	O
through	O
intelligent	B-General_Concept
agents	I-General_Concept
which	O
Oracle	B-Application
Corporation	I-Application
refers	O
to	O
as	O
Oracle	B-General_Concept
Management	O
Agents	O
.	O
</s>
<s>
These	O
run	O
as	O
autonomous	O
proxy	O
processes	O
on	O
a	O
managed	O
node	O
,	O
and	O
perform	O
execution	O
and	O
monitoring	O
tasks	O
for	O
Oracle	B-Operating_System
Enterprise	I-Operating_System
Manager	I-Operating_System
,	O
communicating	O
using	O
the	O
Hypertext	B-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
(	O
HTTP	B-Protocol
or	O
HTTPS	B-Protocol
)	O
.	O
</s>
<s>
By	O
default	O
,	O
upon	O
installation	O
,	O
the	O
OMA	O
enables	O
several	O
packs	O
(	O
Change	O
Management	O
,	O
Performance	O
&	O
Tuning	O
,	O
Diagnostics	O
and	O
Configuration	B-General_Concept
Management	I-General_Concept
)	O
without	O
any	O
regard	O
to	O
what	O
a	O
customer	O
has	O
licensed	O
.	O
</s>
<s>
OEM	O
uses	O
by	O
default	O
the	O
SYSMAN	O
schema	O
in	O
an	O
Oracle	B-General_Concept
database	I-General_Concept
as	O
a	O
super-administrator	O
account/repository	O
.	O
</s>
<s>
Enterprise	O
Manager	O
12c	O
(	O
12.1.0.2	O
)	O
-	O
November	O
2011	O
-	O
In	O
this	O
edition	O
,	O
Oracle	B-General_Concept
stressed	O
hybrid	O
environments	O
,	O
labeling	O
the	O
release	O
'	O
Total	O
Cloud	B-Architecture
Control	O
 '	O
,	O
included	O
the	O
cloud-oriented	O
Oracle	B-Operating_System
Enterprise	I-Operating_System
Manager	I-Operating_System
Cloud	B-Architecture
Control	O
.	O
</s>
<s>
Enterprise	O
Manager	O
11g	O
-	O
June	O
2010	O
-	O
In	O
this	O
edition	O
,	O
Oracle	B-General_Concept
used	O
the	O
term	O
'	O
grid	B-Architecture
 '	O
that	O
they	O
had	O
been	O
using	O
to	O
describe	O
the	O
concept	O
that	O
eventually	O
became	O
more	O
popularly	O
known	O
as	O
'	O
cloud	B-Architecture
 '	O
.	O
</s>
