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Refer to Olaf's LUG 2016/LAD 2016 PPT for more context.
Preferred Routers
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Client sets A and B are all configured on the same LNet network, example o2ib. The servers are on a different LNet network, o2ib2. But due to the underlying network topology it is more efficient to route traffic from Client set A over Router set A and Client set B over Router set B. The green links are wider than the red links. UDSPs can be configured on the clients to specify the preferred set of router NIDs.
Node Types
Based on
| Jira | ||||||
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TODO: This will need a new type of policy. However, I believe we might be crossing a gray area here. LNet will need to have an "understanding" about portal types in a sense. Another suggested solution proposed by Andreas Dilger: Why not just configure the MDS with NID1 and the OSS with NID2, and the client won't even know that they are on the same node?
Reference Links
https://www.ece.tufts.edu/~karen/classes/final_presentation/Dragonfly_Topology_Long.pptx
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