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--- courses:cs397:winter2017:elasticsearch [2017/03/27 03:13] – created admin
+++ courses:cs397:winter2017:elasticsearch [2017/04/16 19:26] (current) – [Inserting documents to an index] admin
@@ Line 1: / Line 1: @@
 ====== Elasticsearch ======
+The following assumes that elasticsearch is running on the localhost on port 9200.
+How do I learn more?  https://www.elastic.co/guide/en/elasticsearch/reference/current/_executing_searches.html
+===== General Info about elasticsearch instance =====
+==== How is elasticsearch doing? ====
+  curl -XGET 'localhost:9200/_cat/health?v&pretty'
+  curl -XGET 'localhost:9200/_cat/nodes?v’
+==== What are the indices on this instance? ====
+  curl -XGET 'localhost:9200/_cat/indices?v&pretty’
+===== Searching Data =====
+==== Viewing Data ====
+This will give you, by default, the first 20 results as prettified JSON
+  curl –XGET ‘localhost:9200/index/_search?pretty’
+==== Filtering Results ====
+Only get results that match certain criteria:
+  curl -XGET 'localhost:9200/index/_search?pretty' -H 'Content-Type: application/json' –d’{"query": { "match": { "field": "value" } } }'
+  curl -XGET 'localhost:9200/index/_search?pretty' -H 'Content-Type: application/json' –d’{ "query": {
+    "bool": {
+      "must": [
+        { "match": { "address": "mill" } },
+        { "match": { "address": "lane" } }
+        ]
+      }
+    }
+  }'
+==== Sorting Examples ====
+Search ''index'', matching all, and sorting by ''field''
+  curl -XGET 'localhost:9200/index/_search?q=*&sort=field:asc&pretty’
+Search ''index'', matching all, and sorting by ''field''
+  curl -XGET 'localhost:9200/index/_search?pretty' -H 'Content-Type: application/json' -d’
+  {
+    "query": { "match_all": {} },
+    "sort": [
+      { "field": "asc" }
+    ]
+  }'
+==== Limiting Results ====
+Only give one result back from searching ''index'':
+  curl -XGET 'localhost:9200/index/_search?q=*&size=1&pretty'
+Give back one result, starting at search result 10, from ''index''
+  curl -XGET 'localhost:9200/bank/_search?q=*&size=1&from=10&pretty'
+==== Aggregations ====
+Finding distinct entities
+  curl -XGET 'localhost:9200/bank/_search?pretty' -H 'Content-Type: application/json' -d'
+  {
+    "size": 0,
+    "aggs": {
+      "group_by_state": {
+        "terms": {
+          "field": "state.keyword"
+        }
+      }
+    }
+  }'
+===== Adding Information =====
+==== Adding an index ====
+  curl -XPUT 'localhost:9200/newindex?pretty’
+==== Inserting documents to an index ====
+Insert the JSON document (after the -d) into the index with the id ''newid'':
+  curl –XPUT ‘localhost:9200/index/external/newid?pretty’ –d’{“field”:”data”}’
+==== Adding from a File ====
+  mongoimport --db dbname --collection whichcollection --file mydata.json
+  curl -XPOST 'http://localhost:9200/dbname' -d @mydata.json
+  curl -XPOST 'http://localhost:9200/dbname/_bulk' —data-binary @mydata.json
+===== Deleting Information =====
+  curl -XDELETE 'localhost:9200/students?pretty'