<s>
Cascading	B-General_Concept
is	O
a	O
software	O
abstraction	B-Architecture
layer	I-Architecture
for	O
Apache	B-Application
Hadoop	I-Application
and	O
Apache	B-Application
Flink	I-Application
.	O
</s>
<s>
Cascading	B-General_Concept
is	O
used	O
to	O
create	O
and	O
execute	O
complex	O
data	O
processing	O
workflows	O
on	O
a	O
Hadoop	B-Application
cluster	O
using	O
any	O
JVM-based	O
language	O
(	O
Java	B-Language
,	O
JRuby	B-Language
,	O
Clojure	B-Language
,	O
etc	O
.	O
</s>
<s>
)	O
,	O
hiding	O
the	O
underlying	O
complexity	O
of	O
MapReduce	B-Operating_System
jobs	O
.	O
</s>
<s>
It	O
is	O
open	O
source	O
and	O
available	O
under	O
the	O
Apache	B-Application
License	I-Application
.	O
</s>
<s>
Cascading	B-General_Concept
was	O
originally	O
authored	O
by	O
Chris	O
Wensel	O
,	O
who	O
later	O
founded	O
Concurrent	O
,	O
Inc	O
,	O
which	O
has	O
been	O
re-branded	O
as	O
Driven	O
.	O
</s>
<s>
Cascading	B-General_Concept
is	O
being	O
actively	O
developed	O
by	O
the	O
community	O
and	O
a	O
number	O
of	O
add-on	O
modules	O
are	O
available	O
.	O
</s>
<s>
To	O
use	O
Cascading	B-General_Concept
,	O
Apache	B-Application
Hadoop	I-Application
must	O
also	O
be	O
installed	O
,	O
and	O
the	O
Hadoop	B-Application
job	O
.jar	O
must	O
contain	O
the	O
Cascading	B-General_Concept
.jars	O
.	O
</s>
<s>
Cascading	B-General_Concept
consists	O
of	O
a	O
data	O
processing	O
API	O
,	O
integration	O
API	O
,	O
process	O
planner	O
and	O
process	O
scheduler	O
.	O
</s>
<s>
Cascading	B-General_Concept
leverages	O
the	O
scalability	O
of	O
Hadoop	B-Application
but	O
abstracts	O
standard	O
data	O
processing	O
operations	O
away	O
from	O
underlying	O
map	O
and	O
reduce	O
tasks	O
.	O
</s>
<s>
Developers	O
use	O
Cascading	B-General_Concept
to	O
create	O
a	O
.jar	O
file	O
that	O
describes	O
the	O
required	O
processes	O
.	O
</s>
<s>
Developers	O
write	O
the	O
code	O
in	O
a	O
JVM-based	O
language	O
and	O
do	O
not	O
need	O
to	O
learn	O
MapReduce	B-Operating_System
.	O
</s>
<s>
The	O
resulting	O
program	O
can	O
be	O
regression	O
tested	O
and	O
integrated	O
with	O
external	O
applications	O
like	O
any	O
other	O
Java	B-Language
application	O
.	O
</s>
<s>
Cascading	B-General_Concept
is	O
most	O
often	O
used	O
for	O
ad	O
targeting	O
,	O
log	O
file	O
analysis	O
,	O
bioinformatics	O
,	O
machine	O
learning	O
,	O
predictive	B-General_Concept
analytics	I-General_Concept
,	O
web	O
content	O
mining	O
,	O
and	O
extract	O
,	O
transform	O
and	O
load	O
(	O
ETL	O
)	O
applications	O
.	O
</s>
<s>
Cascading	B-General_Concept
was	O
cited	O
as	O
one	O
of	O
the	O
top	O
five	O
most	O
powerful	O
Hadoop	B-Application
projects	O
by	O
SD	O
Times	O
in	O
2011	O
,	O
as	O
a	O
major	O
open	O
source	O
project	O
relevant	O
to	O
bioinformatics	O
and	O
is	O
included	O
in	O
Hadoop	B-Application
:	O
A	O
Definitive	O
Guide	O
,	O
by	O
Tom	O
White	O
.	O
</s>
<s>
MultiTool	O
on	O
Amazon	B-Application
Web	I-Application
Services	I-Application
was	O
developed	O
using	O
Cascading	B-General_Concept
.	O
</s>
<s>
LogAnalyzer	O
for	O
Amazon	O
CloudFront	O
was	O
developed	O
using	O
Cascading	B-General_Concept
.	O
</s>
<s>
Scalding	O
-	O
A	O
Scala	O
API	O
for	O
Cascading	B-General_Concept
.	O
</s>
<s>
Makes	O
it	O
easier	O
to	O
transition	O
Cascading/Scalding	O
code	O
to	O
Spark	B-Language
.	O
</s>
