Planning your deployment 27
About the network interface for deduplication
About the network interface for deduplication
If the server host has more than one network interface, by default the host operating system determines which network interface to use. However, you can specify which interface NetBackup should use for the deduplication traffic.
To use a specific interface, enter that interface name when you configure the deduplication storage server.
Caution: You cannot change the network interface after NetBackup configures the deduplication storage server. Therefore, carefully enter the properties.
About firewalls and the deduplication hosts
If firewalls exist between the various deduplication hosts, open ports 10082 and 10102 between those hosts. Deduplication hosts are the deduplication storage server, the load balancing servers, and the clients that deduplicate their own data.
About scaling deduplication
You can scale deduplication processing to improve performance by using load balancing servers or client deduplication or both.
If you configure load balancing servers, those servers also perform deduplication. The deduplication storage server still functions as both a deduplication server and as a storage server. NetBackup uses standard load balancing criteria to select a load balancing server for each job. However, deduplication fingerprint calculations are not part of the load balancing criteria.
To completely remove the deduplication storage server from deduplication duties, do the following for every storage unit that uses the deduplication disk pool:
■Select Only use the following media servers.
■Select all of the load balancing servers but do not select the deduplication storage server.
The deduplication storage server performs storage server tasks only: storing and managing the deduplicated data, file deletion, and optimized duplication.
If you configure client deduplication, the clients deduplicate their own data. Some of the deduplication load is removed from the deduplication storage server and loading balancing servers.
Symantec recommends the following strategies to scale deduplication:
