5 new hot nodes were added, but the relocating shards were all freeze nodes, and the number of freeze nodes was close to equilibrium. ES version 6.8.3

5 new hot nodes were added, but the relocating shards were all freeze nodes, and the number of freeze nodes was close to equilibrium. ES version 6.8.3

awk '{print $ NF}' 2005_shards | sort | uniq -c | grep freeze | sort -k 1 -n

261 data-202-freeze

261 data-203-freeze

261 data-205-freeze

261 data-206-freeze

261 data-208-freeze

261 data-209-freeze

261 data-211-freeze

awk '{print $ NF}' 2005_shards | sort | uniq -c | grep hot | sort -k 1 -n

3 data-224-hot

3 data-225-hot

3 data-226-hot

3 data-227-hot

62 data-07-hot

63 data-16-hot

The index is only set the require zone. It should not be reasonable. Hot node should be balanced first. At least the number of node fragments on the freeze is balanced. It may be that the single index is not balanced because the index shards per node is too large.