How to Move existing Index data to warm nodes

[rahulkothanath (Rahul)]

Currently I have a 6 node cluster (4 hot nodes and 2 warm nodes). hot nodes contain less disk space and warm nodes are almost free..

The indexes are currently active and data ingestion is going on. below are my doubt:

1. how can I move the index data from hot nodes to warm nodes while indexing is going on

2. can I move partial data from hot nodes into warm nodes to relax the hot node storage.

thanks for the help.

[Christian_Dahlqvist]

Are you using time-based indices? Only full indices can be relocated.

[warkolm (Mark Walkom)]

You don't want to move indices if they still have data going into them. You also cannot move part of an index (aka a shard) like that.

Make sure you have looked into ILM as well.

[rahulkothanath (Rahul)]

thanks for the info. I have created ILM but not sure if I can apply ILM to an existing index.

if I can bring an existing index to a new ILM policy it would be great and I will be able to move data into warm nodes as part of ILM.

thanks for help.

[warkolm (Mark Walkom)]

Check out https://www.elastic.co/guide/en/elasticsearch/reference/current/ilm-with-existing-indices.html#ilm-existing-indices-apply

[rahulkothanath (Rahul)]

thank you very much for the help..