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Optimizing Backup and Restore Operations Using Additional Ports

You can increase data transfer speed during backup and restore operations by opening additional firewall ports, which sends data through multiple parallel direct pipeline connections.

Use this procedure to set additional ports to be used by the SnapProtect software on client and MediaAgent computers.

Before You Begin

  • If you are configuring firewall connections, you must set the ports on the client and MediaAgent computers as follows:
    • For one-way firewall connections from the client to the MediaAgent, set the additional ports on the MediaAgent.
    • For one-way firewall connections from the MediaAgent to the client, set the additional ports on the client.
    • For two-way firewall connections, set the additional ports on both the client and MediaAgent computers.
  • Review the following considerations:
    • Connections made through additional ports are not tunnel-encrypted. For details on encrypting pipeline connections to maintain security, see Data Encryption - Overview.
    • When opening additional ports in a firewall setup, it is necessary to also specify those additional ports on both the computer receiving the incoming connection, and the third-party firewall device.
    • When proxies are used, the computers do not communicate directly with each other. Therefore. additional ports might not provide additional benefits.
  • Review the following recommendations for both MediaAgent and client computers.
    MediaAgent Client

    Backup and Restore Operations

    For MediaAgents with the Optimize for concurrent LAN backups option enabled, opening the incoming port of the NetApp Communications (CVD) service improves backup performance.

    Notes:

    • The default port for CVD is port 8400.
    • Opening a port to CVD sets up a direct pipeline for moving backup data, bypassing the firewall tunnel.
    • This optimization technique should not be used if the Bind all Services to open ports only option is selected.

    For multi-stream restores, when the Optimize for concurrent LAN backups option is disabled, opening additional ports increases the restore performance on the MediaAgent.

    • On Windows MediaAgents, only the first additional port is used to establish multiple connections.
    • On UNIX MediaAgents, the number of open ports should correspond to the number of simultaneously running restore streams.

    SnapProtect Operations

    For MediaAgents performing SnapProtect operations with the Data Replicator storage array, opening additional ports increases the backup performance.

    Backup Operations

    For clients that back up data to MediaAgents with the Optimize for concurrent LAN backups option disabled, opening additional incoming ports improves the backup performance.

    • On Windows clients, only the first additional port is used to establish multiple connections.
    • On UNIX clients, the number of open ports should correspond to the number of simultaneously running restore streams.

    Replication performance

    It is recommended to open additional incoming ports on ContinuousDataReplicator computers to improve the replication performance.

Procedure

  1. From the CommCell Browser, right-click the Client or MediaAgent and then click Properties.
  2. In the properties dialog box, click Advanced.
  3. Click the Firewall Configuration tab, then click its Incoming Ports tab.
  4. In the Additional open ports area, specify the range of ports using the From and To fields. The ports may be within the range of 1024 - 65000. Ensure that the ports you specify here are not used by other applications.
  5. Click Add, then click OK.
  6. Push the firewall configuration on the client or MediaAgent.