Determining whether the data movement was LAN-free

Messages and backup reports can indicate whether LAN-free operations are successful. You can also use the QUERY SESSION and QUERY ACTLOG commands to verify LAN-free operations.

Use one or more of the following methods to determine whether the data movement was LAN-free:

• When data transfers on a LAN-free path, the following message is displayed to inform you that the client is starting a session with the storage agent and that LAN-free data movement occurred:

  ANR0415I Session session_number proxied by storage_agent_name for node your_node_name

• View the backup report that is issued when backup processing completes. If LAN-free data movement occurred, the number of LAN-free bytes that are transferred is greater than zero.
• Verify that the sessions are established and that LAN-free data movement is occurring:
  1. Using a Tivoli® Storage Manager administrative command-line client, log in to the storage agent and the Tivoli Storage Manager server.
  2. Issue the QUERY SESSION command for the node that is running the LAN-free backup. In the command output, look for information about bytes sent and bytes received. If LAN-free data movement is occurring:
     • Querying a session on the storage agent shows bytes received for the node that is increasing to the total amount of data that is being backed up.
     • Querying a session on the Tivoli Storage Manager server shows a few bytes of metadata that is received for the same node.
     If the node's session has these characteristics, the data movement is LAN-free.
  Tip: During a failover when the storage agent is sending data directly to the server by proxy because it cannot store the data directly, the session statistics on the server show a much higher byte count.
• Issue either of the following QUERY ACTLOG commands on the server to which the client is connected:
  • query actlog search=storage_agent_name msgno=8337
  • query actlog search=storage_agent_name
  If the query locates entries in the activity log that relate to the storage agent, the client is using LAN-free data transfer.