### Details

### Description

Create 8 empty buckets on a single node.

Add 4 more nodes on cluster.

Rebalance.

Rebalance is taking longer than 30 minutes to complete.

Would like to understand system-expected behaviour for Empty-Bucket rebalances.

Adding logs.

Add 4 more nodes on cluster.

Rebalance.

Rebalance is taking longer than 30 minutes to complete.

Would like to understand system-expected behaviour for Empty-Bucket rebalances.

Adding logs.

* how long it takes to rebalance 1 bucket in your env.

* how long it takes to rebalance 8 buckets in your env.

?

So that I see if per-bucket rebalance time is growing too much with more buckets.