Zero Disk space

Elastic Stack Elasticsearch
1

Hello,
We are using Elastic for a year now, and we're very pleased about it.
We have 2 nodes sitting on different servers with estimated size of 250GB of data sitting one index with 6 shards each.

every now and then we will run out of disk space and I would delete some doc's and run the optimize with only_expunge_deletes=true command.
but now we reached a point were that command needs addition disk space to make the lucene index marge.
So it failed on one of our nodes :confused:, but the good news is that we do succeeded in the other node and right now our stat is Yellow.

My question is :
Because the failed node has no disk space can I manually delete shards folders, hopping that the working node will reallocate the missing shard (which was already space reduced) back ?
If not which files can I delete in order to give the miserable node enough space to recover and complete the optimize command ?

Thanks in advance.

2

Yes but it's dangerous.

Ideally you should add more disk, or more nodes, or alter your indexing structure to let you delete old data.

3

What could happen if I delete for example the folder "0" under the ..\nodes\indices{indexname}\ ?

4

You lose that shard from that node.

5

But I will get it's replica from the other node right ?

6

Assuming there is one, yes.