I recently increased IOPS for a commit log, now should I restart cassandra process to get IOPS in action? I don't find it docs. Please let me know if you come across anywhere in docs?
When the IOPS is modified on a Provision IOPS Elastic Block Store (EBS) Volume, resources are reprovisioned automatically.
It will take time to adjust the IOPS of the volume -- progress can be monitored via the management console.
Once the volume modification is complete, the volume will operate with a higher IOPS. There is no need to restart an application since the modification is transparent. It will simply operate faster if more requests are sent to the volume.