Server Priority Manager workflow: many-to-many connections

The workflow for using Server Priority Manager depends on the connection between the host bus adapters and the storage system ports. When many-to-many connections are established between HBAs and storage system ports, the server priority cannot be defined by the port, because one port can be connected to multiple adapters and multiple ports can be connected to one adapter. For many-to-many connections, you can specify the priority of I/O operations and the upper limit value for each host bus adapter, and you can specify one threshold value for the entire storage system.

The WWN tab of the Server Priority Manager main window is used to manage Server Priority Manager operations for many-to-many connections.

  1. Find the WWNs of the host bus adapters. For details about finding WWNs, see the Provisioning Guide of your storage system.
  2. If desired, assign names to the WWNs for ease of identification. For details, see Changing the SPM name of a host bus adapter.
  3. If you want to manage multiple host bus adapters as a single group, create SPM groups. For details, see Creating an SPM group.
  4. Set the priority (Prio or Non-Prio) on the host bus adapters (WWNs). For details, see Setting priority for WWNs: many-to-many connections.
  5. Monitor the I/O traffic for all prioritized and non-prioritized host bus adapters to collect data and statistics for analysis. For details, see Monitoring WWNs.
  6. Analyze the traffic statistics that you have collected to determine the appropriate upper limits to set for the non-prioritized WWNs. For details, see Analyzing traffic statistics: many-to-many connections.
  7. Set upper limits for traffic on non-prioritized WWNs to prevent these WWNs from affecting the prioritized WWNs. For details, see Setting upper-limit values for non-prioritized WWNs: many-to-many connections.
  8. Monitor traffic at the ports again to check the results of applying the upper-limit values to the non-prioritized WWNs, and adjust the upper-limit values as needed.
  9. If desired, apply a threshold to the entire storage system to allow higher performance for the non-prioritized WWNs when activity on the storage system is low. For details, see Setting a threshold for the entire storage system: many-to-many connections.
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