How to Modify the Puredisk agent Configuration for large backups?

Hi guys

We are backing up 100 approx clients, and many of them are Linux Clients , so due to large backups size we want to modify the pure disk agent for linux configuration, as we have space problem on most of the linux clients, 

We are using PureDisk 6.5.1.2 

So kindly help me and give me the command to modify the pdagent configuration as large backups are there.