NAME

       RDMA-NDD - RDMA device Node Description update daemon

SYNOPSIS

       rdma-ndd <options>

DESCRIPTION

       rdma-ndd is a system daemon which watches for rdma device changes and/or hostname changes and updates the
       Node Description of the rdma devices based on those changes.

DETAILS

       Full operation of this daemon requires kernels which support polling of the procfs hostname file as  well
       as libudev.

       If  your  system  does not support either of these features, the daemon will set the Node Descriptions at
       start up and then sleep forever.

   Node Description configuration
       The daemon uses the environment variable RDMA_NDD_ND_FORMAT to set the node description.   The  following
       wild cards can be specified for more dynamic control.

       %h -- replace with the current hostname (not including domain)

       %d -- replace with the device name (for example mlx4_0, qib0, etc.)

       If not specified the default is "%h %d".

       NOTE:  At  startup,  and on new device detection, the Node Description is always written to ensure the SM
       and rdma-ndd are in sync.  Subsequent events will only write the Node Description on a device if  it  has
       changed.

   Using systemd
       Setting  the  environment  variable  for  the daemon is normally be done via a systemd drop in unit.  For
       example      the       following       could       be       added       to       a       file       named
       /etc/systemd/system/rdma-ndd.service.d/nd-format.conf to use only the hostname as your node description.

       [Service] Environment="RDMA_NDD_ND_FORMAT=%%h"

       NOTE: Systemd requires an extra '%'.

OPTIONS

       -f, --foreground Run in the foreground instead of as a daemon

       -d, --debug Log additional debugging information to syslog

       --systemd Enable systemd integration.

AUTHOR

       Ira Weiny
              < ira.weiny@intel.com >

                                                                                                     RDMA-NDD(8)