<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
is	O
a	O
NoSQL-type	O
distributed	B-Operating_System
key-value	B-Data_Structure
database	I-Data_Structure
from	O
Oracle	B-Application
Corporation	I-Application
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
Cloud	O
Service	O
is	O
a	O
managed	O
cloud	O
service	O
for	O
applications	O
that	O
require	O
low	O
latency	O
,	O
flexible	O
data	O
models	O
,	O
and	O
elastic	O
scaling	O
for	O
dynamic	O
workloads	O
.	O
</s>
<s>
NoSQL	B-General_Concept
database	O
scales	O
to	O
meet	O
dynamic	O
application	O
workloads	O
and	O
throughput	O
requirements	O
.	O
</s>
<s>
A	O
NoSQL	B-General_Concept
table	O
is	O
similar	O
to	O
a	O
relational	O
table	O
with	O
additional	O
properties	O
including	O
provisioned	O
write	O
units	O
,	O
read	O
units	O
,	O
and	O
storage	O
capacity	O
.	O
</s>
<s>
NoSQL	B-General_Concept
Database	O
resources	O
are	O
allocated	O
and	O
scaled	O
accordingly	O
to	O
meet	O
workload	O
requirements	O
.	O
</s>
<s>
NoSQL	B-General_Concept
Database	O
supports	O
tabular	O
model	O
.	O
</s>
<s>
Oracle	B-Application
Corporation	I-Application
distributes	O
the	O
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
in	O
three	O
editions	O
:	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
is	O
licensed	O
using	O
a	O
freemium	O
model	O
:	O
open-source	B-Application
versions	O
of	O
Oracle	B-General_Concept
NoSQL	B-General_Concept
Community	O
Edition	O
are	O
available	O
,	O
but	O
end-users	O
can	O
purchase	O
additional	O
features	O
and	O
support	O
via	O
the	O
Oracle	B-General_Concept
Store	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
drivers	O
,	O
licensed	O
pursuant	O
to	O
the	O
Apache	B-Application
2.0	I-Application
License	I-Application
,	O
are	O
used	O
with	O
both	O
the	O
community	O
and	O
enterprise	O
editions	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
is	O
built	O
upon	O
the	O
Oracle	B-Language
Berkeley	I-Language
DB	I-Language
Java	B-Language
Edition	O
high-availability	B-General_Concept
storage	O
engine	O
.	O
</s>
<s>
It	O
adds	O
services	O
to	O
provide	O
a	O
distributed	B-Operating_System
,	O
highly	O
available	O
key/value	B-Data_Structure
store	I-Data_Structure
,	O
suited	O
for	O
large-volume	O
,	O
latency-sensitive	O
applications	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
is	O
a	O
client-server	O
,	O
sharded	B-General_Concept
,	O
shared-nothing	B-Operating_System
system	I-Operating_System
.	O
</s>
<s>
The	O
data	O
in	O
each	O
shard	B-General_Concept
are	O
replicated	O
on	O
each	O
of	O
the	O
nodes	O
that	O
comprise	O
the	O
shard	B-General_Concept
.	O
</s>
<s>
The	O
major	O
key	O
for	O
a	O
record	O
is	O
hashed	O
to	O
identify	O
the	O
shard	B-General_Concept
that	O
the	O
record	O
belongs	O
to	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
is	O
designed	O
to	O
support	O
changing	O
the	O
number	O
of	O
shards	B-General_Concept
dynamically	O
in	O
response	O
to	O
availability	O
of	O
additional	O
hardware	O
.	O
</s>
<s>
If	O
the	O
number	O
of	O
shards	B-General_Concept
changes	O
,	O
key-value	O
pairs	O
are	O
redistributed	O
across	O
the	O
new	O
set	O
of	O
shards	B-General_Concept
dynamically	O
,	O
without	O
requiring	O
a	O
system	O
shutdown	O
and	O
restart	O
.	O
</s>
<s>
A	O
shard	B-General_Concept
is	O
made	O
up	O
of	O
a	O
single	O
electable	O
master	O
node	O
to	O
serve	O
read	O
and	O
write	O
requests	O
,	O
and	O
several	O
replicas	O
(	O
usually	O
two	O
or	O
more	O
)	O
that	O
can	O
serve	O
read	O
requests	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
provides	O
single-master	O
,	O
multi-replica	O
database	O
replication	O
.	O
</s>
<s>
In	O
the	O
event	O
the	O
master	O
replica	O
node	O
fails	O
,	O
a	O
consensus-based	O
PAXOS-based	O
automated	O
fail-over	O
election	O
process	O
minimizes	O
downtime	O
.	O
</s>
<s>
As	O
soon	O
as	O
the	O
failed	O
node	O
is	O
repaired	O
,	O
it	O
rejoins	O
the	O
shard	B-General_Concept
,	O
updated	O
and	O
then	O
becomes	O
available	O
for	O
processing	O
read	O
requests	O
.	O
</s>
<s>
Thus	O
,	O
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
applications	O
can	O
tolerate	O
failures	O
of	O
nodes	O
within	O
a	O
shard	B-General_Concept
and	O
also	O
multiple	O
failures	O
of	O
nodes	O
in	O
distinct	O
shards	B-General_Concept
.	O
</s>
<s>
Proper	O
placement	O
of	O
masters	O
and	O
replicas	O
on	O
server	O
hardware	O
(	O
racks	O
and	O
interconnect	O
switches	O
)	O
by	O
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
is	O
intended	O
to	O
increase	O
availability	O
on	O
commodity	O
servers	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
Driver	O
partitions	O
the	O
data	O
in	O
real	O
time	O
and	O
evenly	O
distributes	O
it	O
across	O
the	O
storage	O
nodes	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
's	O
administration	O
service	O
can	O
be	O
accessed	O
from	O
a	O
web	O
console	O
or	O
a	O
command-line	B-Application
interface	I-Application
.	O
</s>
<s>
It	O
allows	O
Java	B-Language
Management	I-Language
Extensions	I-Language
(	O
JMX	O
)	O
or	O
Simple	B-Protocol
Network	I-Protocol
Management	I-Protocol
Protocol	I-Protocol
(	O
SNMP	B-Protocol
)	O
agents	O
to	O
be	O
available	O
for	O
monitoring	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
includes	O
a	O
topology	O
planning	O
feature	O
,	O
with	O
which	O
an	O
administrator	O
can	O
modify	O
the	O
configuration	O
of	O
a	O
NoSQL	B-General_Concept
database	O
while	O
the	O
database	O
is	O
online	O
.	O
</s>
<s>
Increase	O
data	O
distribution	O
:	O
by	O
increasing	O
number	O
of	O
shards	B-General_Concept
in	O
the	O
cluster	O
,	O
which	O
increases	O
write	O
throughput	O
.	O
</s>
<s>
Increase	O
replication	O
factor	O
:	O
by	O
assigning	O
additional	O
replication	O
nodes	O
to	O
each	O
shard	B-General_Concept
,	O
which	O
increases	O
read	O
throughput	O
and	O
system	O
availability	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
supports	O
multiple	O
zones	O
to	O
intelligently	O
allocate	O
replication	O
of	O
processes	O
and	O
data	O
,	O
in	O
order	O
to	O
improve	O
reliability	O
during	O
hardware	O
,	O
network	O
and	O
power-related	O
failure	O
modes	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
supports	O
Avro	B-Operating_System
data	O
serialization	O
,	O
which	O
provides	O
a	O
compact	O
,	O
schema-based	O
binary	O
data	O
format	O
.	O
</s>
<s>
Schemas	O
are	O
defined	O
using	O
JSON	B-General_Concept
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
supports	O
schema	O
evolution	O
.	O
</s>
<s>
Smart	O
Topology	O
supports	O
data	B-Operating_System
centers	I-Operating_System
,	O
ensuring	O
that	O
a	O
full	O
set	O
of	O
replicas	O
is	O
initially	O
allocated	O
to	O
each	O
data	B-Operating_System
center	I-Operating_System
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
provides	O
facilities	O
to	O
perform	O
a	O
rolling	O
upgrade	O
,	O
allowing	O
a	O
system	O
administrator	O
to	O
upgrade	O
cluster	O
nodes	O
while	O
the	O
database	O
remains	O
available	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
is	O
configurable	O
to	O
be	O
either	O
C/P	O
or	O
A/P	O
in	O
CAP	B-Operating_System
.	O
</s>
<s>
In	O
particular	O
,	O
if	O
writes	O
are	O
configured	O
to	O
be	O
performed	O
synchronously	O
to	O
all	O
replicas	O
,	O
it	O
is	O
C/P	O
in	O
CAP	B-Operating_System
i.e.	O
</s>
<s>
If	O
replication	O
is	O
performed	O
asynchronously	O
,	O
and	O
reads	O
are	O
configured	O
to	O
be	O
served	O
from	O
any	O
replica	O
,	O
it	O
is	O
A/P	O
in	O
CAP	B-Operating_System
i.e.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
EE	O
Stream	O
based	O
APIs	O
allow	O
reading	O
and	O
writing	O
large	O
objects	O
(	O
LOBs	O
)	O
such	O
as	O
audio	O
and	O
video	O
files	O
,	O
without	O
having	O
to	O
materialize	O
the	O
entire	O
file	O
in	O
memory	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
provides	O
ACID	O
compliant	O
transactions	O
for	O
full	O
create	B-General_Concept
,	I-General_Concept
read	I-General_Concept
,	I-General_Concept
update	I-General_Concept
and	I-General_Concept
delete	I-General_Concept
(	O
CRUD	B-General_Concept
)	O
operations	O
,	O
with	O
adjustable	O
durability	O
and	O
consistency	O
transaction	O
guarantees	O
.	O
</s>
<s>
A	O
sequence	O
of	O
operations	O
can	O
operate	O
as	O
a	O
single	O
atomic	B-General_Concept
unit	O
as	O
long	O
as	O
all	O
the	O
affected	O
records	O
share	O
the	O
same	O
major	O
key	O
path	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
includes	O
support	O
for	O
Java	B-Language
,	O
C	B-Language
,	O
Python	B-Language
,	O
C#	B-Application
and	O
REST	B-Protocol
APIs	I-Protocol
.	O
</s>
<s>
These	O
allow	O
the	O
application	O
developer	O
to	O
perform	O
CRUD	B-General_Concept
operations	O
.	O
</s>
<s>
These	O
libraries	O
include	O
Avro	B-Operating_System
support	O
,	O
so	O
that	O
developers	O
can	O
serialize	O
key-value	O
records	O
and	O
de-serialize	O
key-value	O
records	O
interchangeably	O
between	O
C	B-Language
and	O
Java	B-Language
applications	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
supports	O
Oracle	B-General_Concept
REST	B-Protocol
Data	O
Services	O
(	O
ORDS	O
)	O
.	O
</s>
<s>
This	O
allows	O
customers	O
to	O
build	O
a	O
REST-based	O
application	O
that	O
can	O
access	O
data	O
in	O
either	O
Oracle	B-General_Concept
Database	I-General_Concept
or	O
OND	O
.	O
</s>
<s>
Supports	O
spatial	O
queries	O
on	O
RFC7946	O
compliant	O
GeoJSON	B-General_Concept
data	O
.	O
</s>
<s>
Spatial	O
functions	O
and	O
indexing	O
for	O
GeoJSON	B-General_Concept
data	O
are	O
supported	O
.	O
</s>
<s>
KVAvroInputFormat	O
and	O
KVInputFormat	O
classes	O
are	O
available	O
to	O
read	O
data	O
from	O
OND	O
natively	O
into	O
Hadoop	B-Application
MapReduce	B-Operating_System
jobs	O
.	O
</s>
<s>
One	O
use	O
for	O
this	O
class	O
is	O
to	O
read	O
NoSQL	B-General_Concept
database	O
records	O
into	O
Oracle	B-General_Concept
Loader	O
for	O
Hadoop	B-Application
.	O
</s>
<s>
Oracle	B-General_Concept
Big	O
Data	O
SQL	O
is	O
a	O
common	O
SQL	O
access	O
layer	O
to	O
data	O
stored	O
in	O
Hadoop	B-Application
,	O
HDFS	O
,	O
Hive	O
and	O
OND	O
.	O
</s>
<s>
This	O
allows	O
customers	O
to	O
query	O
Oracle	B-General_Concept
NoSQL	B-General_Concept
Data	O
from	O
Hive	O
or	O
Oracle	B-General_Concept
Database	I-General_Concept
.	O
</s>
<s>
Users	O
can	O
run	O
MapReduce	B-Operating_System
jobs	O
against	O
data	O
stored	O
in	O
OND	O
that	O
is	O
configured	O
for	O
secure	O
access	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
EE	O
supports	O
external	O
table	O
allows	O
fetching	O
Oracle	B-General_Concept
NoSQL	B-General_Concept
data	O
from	O
Oracle	B-General_Concept
database	I-General_Concept
using	O
SQL	O
statements	O
such	O
as	O
Select	O
,	O
Select	O
Count( *	O
)	O
etc	O
.	O
</s>
<s>
Once	O
NoSQL	B-General_Concept
data	O
is	O
exposed	O
through	O
external	O
tables	O
,	O
one	O
can	O
access	O
the	O
data	O
via	O
standard	O
JDBC	O
drivers	O
and/or	O
visualize	O
it	O
through	O
enterprise	O
business	O
intelligence	O
tools	O
.	O
</s>
<s>
Oracle	B-General_Concept
Event	O
Processing	O
(	O
OEP	O
)	O
provides	O
read	O
access	O
to	O
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
via	O
the	O
NoSQL	B-General_Concept
Database	O
cartridge	O
.	O
</s>
<s>
Oracle	B-General_Concept
Semantic	O
Graph	O
includes	O
a	O
Jena	O
Adapter	O
for	O
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
to	O
store	O
large	O
volumes	O
of	O
RDF	O
data	O
(	O
as	O
triplets/quadruplets	O
)	O
.	O
</s>
<s>
This	O
adapter	O
enables	O
fast	O
access	O
to	O
graph	O
data	O
stored	O
in	O
OND	O
via	O
SPARQL	B-Language
queries	O
.	O
</s>
<s>
Integration	O
with	O
Oracle	B-Application
Coherence	I-Application
allows	O
OND	O
to	O
be	O
used	O
as	O
a	O
cache	O
for	O
Oracle	B-Application
Coherence	I-Application
applications	O
,	O
allowing	O
applications	O
to	O
directly	O
access	O
cached	O
data	O
from	O
OND	O
.	O
</s>
<s>
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
EE	O
supports	O
OS-independent	O
,	O
cluster-wide	O
password-based	O
user	O
authentication	O
and	O
Oracle	B-General_Concept
Wallet	O
integration	O
and	O
enables	O
greater	O
protection	O
from	O
unauthorized	O
access	O
to	O
sensitive	O
data	O
.	O
</s>
<s>
Additionally	O
,	O
session-level	O
Secure	B-Protocol
Sockets	I-Protocol
Layer	I-Protocol
(	O
SSL	O
)	O
encryption	O
and	O
network	O
port	O
restrictions	O
improve	O
protection	O
from	O
network	O
intrusion	O
.	O
</s>
<s>
The	O
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
team	O
has	O
worked	O
with	O
several	O
key	O
Oracle	B-General_Concept
partners	O
,	O
including	O
Intel	O
and	O
Cisco	O
,	O
performing	O
Yahoo	O
!	O
</s>
<s>
Cloud	O
Serving	O
Benchmarks	O
(	O
YCSB	B-Application
)	O
on	O
various	O
hardware	O
configurations	O
,	O
and	O
published	O
its	O
results	O
.	O
</s>
<s>
For	O
example	O
,	O
in	O
2012	O
Oracle	B-General_Concept
reported	O
that	O
Oracle	B-Application
NoSQL	I-Application
Database	I-Application
exceeded	O
1	O
million	O
mixed	O
YCSB	B-Application
Ops/Sec	O
.	O
</s>
