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Linux - Performance degradation when RDMA connection between nodes is down [3877836]
In clusters communicating over RDMA connections, when you reboot cluster nodes, services come online and nodes in the cluster communicate over LLT links.
But sometimes the RDMA connections, between nodes, do not come back online. This affects node performance. Such cases are typically seen with 8 node clusters, and beyond.
To check the status of RDMA links, run the lltstat -nvvr configured command on each node to check whether the status of TxRDMA and RxRDMA link is "Down."
Workaround: The workaround is to either manually restart the stack on all the nodes or run CPI to restart cluster nodes.
The Partitioned Directory feature in VxFS (Veritas File System) is disabled by default, but can be enabled manually.
https://www.veritas.com/support/en_US/article.100041581
Updates, Patches and Late Breaking News for Release Notes for Veritas InfoScale 7.1