Intel® MPI Library User's Guide for Linux* OS
MPD stands for Multipurpose Daemon. This is the Intel® MPI Library process management system for starting parallel jobs, which have to run on all nodes. MPDs gather information about the system and hardware, as well as communicate with each other to exchange required information. For example, an MPD ring is required for correct pinning under the MPD process manager.
Multipurpose daemon* (MPD) has been deprecated starting with Intel® MPI Library 5.0 release. Convert to using the scalable process management system (Hydra) instead to start parallel jobs.