In this RCE Podcast, Brock Palen and Jeff Squyres discuss PMIx with Ralph Castain from Intel. “The Process Management Interface (PMI) has been used for quite some time as a means of exchanging wireup information needed for interprocess communication. While PMI-2 demonstrates better scaling properties than its PMI-1 predecessor, attaining rapid launch and wireup of the roughly 1M processes executing across 100k nodes expected for exascale operations remains challenging.”