diff --git a/content/research/_index.md b/content/research/_index.md
new file mode 100644
index 0000000..af00312
--- /dev/null
+++ b/content/research/_index.md
@@ -0,0 +1,18 @@
++++
+title = "Research Notes"
+transparent = true
++++
+
+
+
{{ section.title }}
+
+
+
diff --git a/content/research/elastic.md b/content/research/elastic.md
new file mode 100644
index 0000000..d3a1873
--- /dev/null
+++ b/content/research/elastic.md
@@ -0,0 +1,33 @@
++++
+title = "ElasticSearch"
+
+[taxonomies]
+tags = ["research", "elastic", "elasticsearch", "docker"]
++++
+
+## Docker image
+
+```
+docker pull docker.elastic.co/elasticsearch/elasticsearch:7.8.0
+```
+
+## Start
+
+```
+docker run -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" docker.elastic.co/elasticsearch/elasticsearch:7.8.0
+```
+
+- Port 9200: REST interface.
+- Port 9300: Inter-node communication.
+- `discovery.type`: Just one node, no discovery needed.
+
+## Definitions
+
+- MySQL => Databases => Tables => Columns/Rows
+- Elasticsearch => Indices => Types => Documents with Properties
+
+## Adding information (REST)
+
+```
+POST //_doc/
+```