<s>
Apache	B-Application
Airflow	I-Application
is	O
an	O
open-source	B-Application
workflow	O
management	O
platform	O
for	O
data	O
engineering	O
pipelines	O
.	O
</s>
<s>
Creating	O
Airflow	O
allowed	O
Airbnb	O
to	O
programmatically	O
author	O
and	O
schedule	O
their	O
workflows	O
and	O
monitor	O
them	O
via	O
the	O
built-in	O
Airflow	O
user	B-Application
interface	I-Application
.	O
</s>
<s>
From	O
the	O
beginning	O
,	O
the	O
project	O
was	O
made	O
open	O
source	O
,	O
becoming	O
an	O
Apache	B-Application
Incubator	I-Application
project	O
in	O
March	O
2016	O
and	O
a	O
top-level	O
Apache	O
Software	O
Foundation	O
project	O
in	O
January	O
2019	O
.	O
</s>
<s>
Airflow	O
is	O
written	O
in	O
Python	B-Language
,	O
and	O
workflows	O
are	O
created	O
via	O
Python	B-Language
scripts	I-Language
.	O
</s>
<s>
While	O
other	O
"	O
configuration	O
as	O
code	O
"	O
workflow	O
platforms	O
exist	O
using	O
markup	O
languages	O
like	O
XML	B-Protocol
,	O
using	O
Python	B-Language
allows	O
developers	O
to	O
import	O
libraries	O
and	O
classes	O
to	O
help	O
them	O
create	O
their	O
workflows	O
.	O
</s>
<s>
Tasks	O
and	O
dependencies	O
are	O
defined	O
in	O
Python	B-Language
and	O
then	O
Airflow	O
manages	O
the	O
scheduling	O
and	O
execution	O
.	O
</s>
<s>
a	O
file	O
appearing	O
in	O
Hive	B-General_Concept
)	O
.	O
</s>
<s>
Previous	O
DAG-based	O
schedulers	O
like	O
Oozie	B-Language
and	O
Azkaban	O
tended	O
to	O
rely	O
on	O
multiple	O
configuration	B-Protocol
files	I-Protocol
and	O
file	B-Application
system	I-Application
trees	I-Application
to	O
create	O
a	O
DAG	O
,	O
whereas	O
in	O
Airflow	O
,	O
DAGs	O
can	O
often	O
be	O
written	O
in	O
one	O
Python	B-Language
file	O
.	O
</s>
<s>
has	O
built	O
a	O
SaaS	B-Architecture
tool	O
and	O
Kubernetes-deployable	O
Airflow	O
stack	O
that	O
assists	O
with	O
monitoring	O
,	O
alerting	O
,	O
devops	O
,	O
and	O
cluster	O
management	O
.	O
</s>
<s>
Cloud	O
Composer	O
is	O
a	O
managed	O
version	O
of	O
Airflow	O
that	O
runs	O
on	O
Google	B-General_Concept
Cloud	I-General_Concept
Platform	I-General_Concept
(	O
GCP	O
)	O
and	O
integrates	O
well	O
with	O
other	O
GCP	O
services	O
.	O
</s>
<s>
Starting	O
from	O
November	O
2020	O
,	O
Amazon	B-Application
Web	I-Application
Services	I-Application
offers	O
Managed	O
Workflows	O
for	O
Apache	B-Application
Airflow	I-Application
.	O
</s>
