DRMAA

Distributed Resource Management Application API (DRMAA) is a high-level Open Grid Forum (OGF) API specification for the submission and control of jobs to a distributed resource management (DRM) system, such as a cluster or grid computing infrastructure. The scope of the API covers all the high level functionality required for applications to submit, control, and monitor jobs on execution resources in the DRM system.

In 2007, DRMAA was one of the first two (the other one was GridRPC) specifications that reached the full recommendation status in the OGF.

In 2012 the second version of the DRMAA standard (DRMAA2) was published in an abstract interface definition language (IDL) defining the semantic of the functions in GFD 194. DRMAA2 specifies more than twice as many calls as DRMAA. It covers cluster monitoring, has a notion of queues and machines, and introduces a multi job-session concept for single applications for a better job workflow management. Later in 2012 the C API was specified as a first language binding in GF 198.

Development model
The development of this API was done through the Global Grid Forum, in the model of IETF standard development, and it was originally co-authored by:
 * Roger Brobst from Cadence Design Systems
 * Waiman Chan from IBM
 * Fritz Ferstl from Sun Microsystems, now Univa
 * Jeff Gardiner from John P. Robarts Research Institute
 * Andreas Haas from Sun Microsystems (Co-chair)
 * Bill Nitzberg from Altair Engineering
 * Hrabri Rajic from Intel (Maintainer & Co-chair)
 * John Tollefsrud from Sun Microsystems Founding (chair)

This specification was first proposed at Global Grid Forum 3 (GGF3) in Frascati, Italy, but gained most of its momentum at Global Grid Forum 4 in Toronto, Ontario. The development of the specification was first proposed with the objective to facilitate direct interfacing of applications to existing DRM systems by application's builders, portal builders, and Independent Software Vendors (ISVs). Because the API was co-authored by participants from a wide-selection of companies and included participants from industries and education, its development resulted in an open standard that received a relatively good reception from a wide audience quickly.

Significance
Without DRMAA, no standard model existed to submit jobs to component regions of a Grid, assuming each region was running local DRMSs. The first version of DRMAA API has been implemented in Sun's Grid Engine and also in the University of Wisconsin–Madison's program Condor.