# What does ES-Hadoop do? **URL:** \ **Category:** Elasticsearch\ **Tags:** es-hadoop\ **Created:** [March 8, 2016, 2:31am UTC](https://discuss.elastic.co/t/what-does-es-hadoop-do/43724 "2016-03-08T02:31:15Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Kramer\_Li](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kramer_li/32/46872_2.png) [@Kramer\_Li](https://discuss.elastic.co/u/Kramer_Li)\ **Post date:** [March 8, 2016, 2:31am UTC](https://discuss.elastic.co/t/what-does-es-hadoop-do/43724/1 "2016-03-08T02:31:15Z")
In what situation you need ES-Hadoop? ES can be used as a search engine, analyze engine and even storage. Why we need ES-hadoop? Can you give some very specific example please? ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [March 8, 2016, 3:17am UTC](https://discuss.elastic.co/t/what-does-es-hadoop-do/43724/2 "2016-03-08T03:17:55Z")
Do you have hadoop? If not then you probably don't need it. ---
**Author:** ![Kramer\_Li](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kramer_li/32/46872_2.png) [@Kramer\_Li](https://discuss.elastic.co/u/Kramer_Li)\ **Post date:** [March 8, 2016, 5:32am UTC](https://discuss.elastic.co/t/what-does-es-hadoop-do/43724/3 "2016-03-08T05:32:46Z")
Hi Mark Are you from Cisco? Because I seems found your name on a cisco blog. That BLOG talks about using ES to handle Netflow data. 🙂 Regards Mingwei ---
**Author:** ![costin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/costin/32/44950_2.png) [@costin](https://discuss.elastic.co/u/costin)\ **Post date:** [March 8, 2016, 7:50am UTC](https://discuss.elastic.co/t/what-does-es-hadoop-do/43724/4 "2016-03-08T07:50:20Z")
To quote the [docs](https://www.elastic.co/guide/en/elasticsearch/hadoop/master/reference.html): > Elasticsearch for Apache Hadoop is an open-source, stand-alone, self-contained, small library that allows Hadoop jobs (whether using Map/Reduce or libraries built upon it such as Hive, Pig or Cascading or new upcoming libraries like Apache Spark ) to interact with Elasticsearch. One can think of it as a connector that allows data to flow bi-directionaly so that applications can leverage transparently the Elasticsearch engine capabilities to significantly enrich their capabilities and increase the performance. ---
**Author:** ![Kramer\_Li](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kramer_li/32/46872_2.png) [@Kramer\_Li](https://discuss.elastic.co/u/Kramer_Li)\ **Post date:** [March 8, 2016, 9:05am UTC](https://discuss.elastic.co/t/what-does-es-hadoop-do/43724/5 "2016-03-08T09:05:40Z")
So.. It is like a tunnel between elasticsearch and hadoop. Data can flow between each other right? ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [March 11, 2016, 10:53pm UTC](https://discuss.elastic.co/t/what-does-es-hadoop-do/43724/6 "2016-03-11T22:53:26Z")
You did, where was that? ---
**Author:** ![vinayakshukre](https://avatars.discourse-cdn.com/v4/letter/v/58f4c7/32.png) [@vinayakshukre](https://discuss.elastic.co/u/vinayakshukre)\ **Post date:** [August 31, 2016, 7:50am UTC](https://discuss.elastic.co/t/what-does-es-hadoop-do/43724/7 "2016-08-31T07:50:01Z")
ES-Hadoop is connector between elasticsearch and hadoop. Does that mean I should not store any data in HDFS and store everything in elasticsearch? Without this connector, it was not possible to run MR jobs on data in elasticsearch. Es-hadoop allows that. So is it ok to have no or very low disk space given to HDFS ? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 1:23pm UTC](https://discuss.elastic.co/t/what-does-es-hadoop-do/43724/8 "2017-07-06T13:23:30Z")