RDMA adapters not supporting ATOMIC operations

Remote Direct Access Memory (RDMA) adapters must support atomic operations. For more information about available configuration requirements for utilizing RDMA, refer to the IBM Storage Scale FAQ in IBM® Documentation.

If the IBM Storage Scale log file contains the following warning message:

[W] VERBS RDMA open error verbsPort <port> due to missing support for atomic operations for device <device>

Workaround:

Check the description of the verbsRdmaWriteFlush configuration variable in the mmchconfig command for possible options.