[LU-4001] Auto-adapt LND tunables to the brand of IB interface

• Type: Improvement
• Resolution: Duplicate
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Assignee: Amir Shehata (Inactive)
• Reporter: Doug Oucharek (Inactive)

Description

Tuning experiments done by one of our SE's, Bobbie Lind, found that the map_on_demand parameter has a significant performance improvement when turned on with Truescale IB cards. Currently, we leave this parameter off as it does not have a positive effect with Mellanox IB cards.

This ticket calls for an improvement whereby we detect the brand of IB card (Truescale or Mellanox) and set the default for map_on_demand accordingly (off for Mellanox, a reasonable value for Truescale).