The following best practices should be followed when using Commvault deduplication:
Configure global deduplication policies before creating data management storage policies.
When creating primary or secondary copies that will use global deduplication policies, the copies must be associated with the global deduplication policy at creation time.
By default, transactional deduplication is not enabled. If it will be used, enable it prior to protecting any data.
Determine and configure compression settings prior to protecting any data.
Determine when partition deduplication is applicable.
Enable client-side disk cache only for remote backups such as laptop / desktop clients or remote location which will backup directly over the WAN.
Before hosting the DDB, ensure that the MediaAgent and disks meet the hardware and software requirements referenced in Deduplication Building Block Guide.
Single or partitioned DDB configuration:
Place the DDB in a folder on a different volume or partition than that of the root file system.
Do not host the DDB under the software installation directory, for example software_installation_directory\Base directory.
For Linux, host the DDB on LVM volumes. The DDB Backups use LVM software for snapshots.
Partitioned DDB configuration:
Host each DDB on different physical drives for better performance.
When hosting the DDB on different MediaAgents, ensure that all MediaAgents are of similar operating system type with 64-bit version, and the MediaAgents are online.
For more information on supported platforms, see Deduplication Building Block Guide.
For DDB Network Interface - By default, no data network interface pair is configured.
We recommend that you configure a dedicated Network Interface Card (NIC) on each partition MediaAgent and set up data interface pair (DIP) between the data path and partition MediaAgents:
To increase the speed of the communication between the MediaAgents.
To improve data protection job throughput.
To avoid network bottlenecks.
If you have a NIC configured on a partition MediaAgent, specify the network interface name or IP address for the DDB Network Interface.