Urgent: Major problem in data directory change

Elastic Stack Elasticsearch
1

Hello,
We have to change the DATA_DIR path from current_dir to new_dir now in running elasticsearch server in production. because current_dir has low disk watermark issue.
I am afraid we wont be able to get old data in Kibana.

Can we move all those indices to the new directory?
I Not, how can we read the old data at old_dir from Kibana?
please reply as soon as possible.

br,
Sunil

2

Your best bet is to stop indexing, flush all the indexes, shut down elasticsearch, do a recursive copy of the data in the first data directory to the new data directory and start elasticsearch again. It should "just work".

1 Like
3

Hi Nik,
Thanks for the reply.
If I am correct I have to copy indices directory as it is to new location. Right?

I have checked old data directory. There are couple of files and directories.
under /var/lib/elasticsearch/prod-elasticsearch/nodes/0/indices/
above directory has _state directory and node.lock file. What is significance of these 2 when I copy indices?

Somewhere I read about schema. if schema doesnt get copied properly, it will fail? is it true?

br,
Sunil

4

To be safe, you should copy the entire recursive contents of your data directory over to your new data path...