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The backup process—especially the compression and deduplication process—is a resource-intensive operation. The amount of spare CPU and RAM on a client contribute to the client’s backup performance.
If a client requires a reduction in the total backup time, monitor client performance—in addition to monitoring the CommServe and MediaAgent performance—during the backups. Additional CPU and RAM can help with the compression and deduplication hashing algorithms and so reduce the backup time. Verify that disk performance and other workload or maintenance operations are not affecting the backup. If resources cannot be easily increased, test to determine if offloading the compression or deduplication, or both processes, from the client to the MediaAgents helps. Balance the performance gains of these adjustments against the increased network bandwidth consumption between the client and the MediaAgent.
It is critical to review Commvault’s tuning recommendations when configuring cloud storage libraries.