we are new to Commvault and we are facing an Issue where our Log Backups runs very slowly during the Aux Copy is running. Storage is an EMC Isilon A200 with 8 Nodes. Someone knows this issue maybe?
While using EMC Isilon as a Disk Library Target for CommVault, I would recommend to review the following Best Practice Whitepaper provided by EMC for better utilization between Application and Storage - https://www.dellemc.com/resources/en-us/asset/white-papers/products/storage/h13077-wp-isilon-backup-using-commvault-bestpractices.pdf
The document details very specific settings that should be applied to minimize bottleneck and improve overall throughput for all sort of CommVault related operations (i.e. Aux Copy included)
See how you go and feel free to reach out if you have any questions