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. Furthermore, C, Java, and IDL binding documents have been made available.

Implementations

* Grid Engine
* Univa Grid Engine
* HTCondor
* Torque/PBS
* GridWay
* Xgrid
* EGEE (LCG2 / gLite)
* UNICORE
* Kerrighed Cluster Framework
* IBM Tivoli Workload Scheduler LoadLeveler
* SLURM
* Python DRMAA2 Reference Implementation

Language Bindings

* C
* C++
* Go
* Java
* JavaScript
* Perl
* Python
* Python DRMAA2 Binding
* Ruby
* Tcl
Other language bindings can be generated easily from SWIG, which was first used by the Perl binding.

DRMAA applications

A number of software solutions use DRMAA to interface with different resource management systems:
* LONI Pipeline
* tigr-workflow
* eXludus RepliCator
* GridwiseTech Grid Engine-Globus Toolkit adapter

References

Distributed Resource Management Application API Specification 1
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External links

DRMAA's Project PageOpen Grid ForumCondor HomepageDRMAA binding for Platform LSFCondor Extensions ProjectDRMAA binding for Ruby

Grid computing
Open standards