Index Vs Partial Update in ElasticSearch

Question

I am trying to understand the difference between update and index operation in ElasticSearch for existing document in terms of efficiency and as per the documentation(link given below), update removes network roundtrips. Can someone explain how?

Link - https://www.elastic.co/guide/en/elasticsearch/reference/6.2/docs-update.html

Nirmal · Accepted Answer · 2018-11-02 02:39:36Z

3

With update, you can send partial/scripted updates to elasticsearch - ES internally loads the document into map , applies updated fields and does reindexing operation.

I would use index if you have entire document available in caller / document is not very huge. Update does avoid round trip to client, but it got some processing overhead on ES side.

answered Nov 2, 2018 at 2:39

Nirmal

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2 Comments

lulalala Over a year ago

I didn't know indexing would cause round trip communication. Could you clarify on that please?

Nirmal Over a year ago

indexing wont cause - but updating from client side involves fetching + updating docs if you dont have doc externally maintained.. thats what i meant. sorry for any confusion

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