hi:
1、Recently, new shards were added to the cluster and data balance was carried out. We know that the source shard was deleting chunk asynchronously. We balance data at the service low peak, but the deletion of chunk is delayed. As a result, the chunk is deleted at the service high peak, and I/OS are fully occupied, which affects normal service operations。

So I would like to know how to monitor the current deletion progress so that I can know how long the deletion takes and the impact window