Network considerations
The inbound bandwidth of the aggregated network interface cards determines how fast data may be ingested into the server, including backups, replication and duplication, and so on. The outbound bandwidth determines how fast data may be retrieved from the system, including restore, replication, and duplication, and so on. For a given backup/restore client, the network bandwidth and the connection speed between the client and MSDP determines the maximum throughput achievable between the client and the server. The network latency and package drop rate may impact the user observed performance as well. For a high latency and low bandwidth network connection, client-side deduplication with multistream daemon (mtstrmd) can help boost the backup performance. mtstrmd is the MSDP deduplication multithreaded agent. It receives data from the deduplication plug-in through shared memory and processes. It uses multiple threads to improve performance. It performs fingerprint batch query to reduce the performance impacts from the network latency.
See the NetBackup Deduplication Guide for details about mtstrmd and how to configure the agent.