I have a cluster with almost all nodes 111 shards and only 2 nodes 108.
I understand that ES balance the cluster with shard count.
cluster has around 19 nodes, 3 master eligible of them 2 data as well and 16 data nodes.
these two nodes with less shards are always reaching low watermark. Even though the shards are around same size.
I have few nodes with 600gb free and these two nodes with less shard count have only 70gb free. This is because of the few indices with very less size and few with more size.
ES version: 7.5.2
- How to move replica shards from one node to another. (delete and direct to allocate them on a specific node or is there any direct way to issue a command using reroute).
- When rebalancing the cluster, how ES calculates what shard to move from one node to another.