How can I monitor the progress of data migration between shards in MongoDB

1. Use the `sh.status()` Command:
- This command displays the current status of the sharded cluster, including the shard configuration and chunk distribution. This can help you track the migration progress by checking the chunk ranges and distribution[1].

2. Monitor the Balancer:
- The balancer is responsible for automatically migrating chunks between shards. You can monitor its progress by checking the balancer logs or using the `sh.status()` command to view the balancer's current status[2][3].

3. Use the `moveChunk` Command:
- When manually migrating chunks, you can use the `moveChunk` command to track the progress. This command allows you to move chunks from one shard to another and can be used to monitor the migration process[1][4].

4. Check the Cluster Metadata:
- After the migration, you can check the cluster metadata to ensure that the chunks have been successfully moved and updated. This can be done using the `db.collection.getShardDistribution()` method[2][3].

5. Use MongoDB's Built-in Monitoring Tools:
- MongoDB provides built-in tools for monitoring and managing sharded clusters. These tools can help you track the migration progress and identify any issues that may arise during the process[1][4].

By using these methods, you can effectively monitor the progress of data migration between shards in MongoDB.