Hi,
The cluster.routing.allocation.balance.shard setting defines the weight factor for the total number of shards allocated to each node. By increasing this value, Elasticsearch will try to equalize the total number of shards across all nodes.
However, please note that adjusting these settings should be done with caution. The default values are generally good for most use cases, and changing them might improve the current balance but could potentially cause problems in the future if the cluster or workload changes.
Regards