RADICAL Cybertools

Promoting a Standards-Based, Abstraction-Driven Approach to High-Performance Distributed Computing

RADICAL Cybertools is an abstractions-based suite of well-defined capabilities that are architected for scalable, interoperable and sustainable approaches to support science on a range of high-performance and distributed computing systems.

It currently consists of three components: RADICAL-SAGA: a standards-based interface that provides basic interoperability across a range of computing middleware; RADICAL-Pilot: a scalable and flexible Pilot-Job system that provides flexible application-level resource management capabilities, and Ensemble Toolkit that simplifies the ability to implement ensemble-based applications.

RADICAL Cybertools builds upon important theoretical advances, production software development best practices and well defined usage and programming models. RADICAL Cybertools is also a vehicle for active cyberinfrastructure research, which enable its users to seamlessly reach the next level of scale and functionality.

RADICAL Cybertools is supported by NSF ACI 1440677 and ACI 1253644. Contact RADICAL group members for more information.


RADICAL-SAGA is the infrastructure access layer of the RADICAL Cybertools stack. It provides a homogeneous programming interface to the majority of production HPC queuing systems, Grid- and Cloud-services. RADICAL-SAGA supports XSDE and OSG resources as well as academic and commercial cloud computing platforms.

More Info Documentation Github Project



RADICAL-Pilot uses pilots in order to achieve the scalable execution of large numbers of tasks. A pilot is a job submitted to a machine in order to acquire exclusive use of a chunk of its resources. Once the pilot becomes active, it can execute the tasks specified by the user. Instead of having each task waiting on a machine to be executed, the user only has to wait once with a pilot! RADICAL-Pilot allows users to specify resources in the form of pilots and their tasks separately so the user can wait once and run everything.

Basic Example Getting Started More Info Documentation Github Project

Ensemble Toolkit

Ensemble Toolkit provides a simple way to develop applications comprised of multiple tasks and which adhere to pre-defined patterns. The tool comes predefined with common execution patterns so users can quickly adapt the toolkit to their needs; it is possible to define more complex execution patterns. By building upon RADICAL-Pilot, the Ensemble Toolkit can take advantage of flexible and scalable resource management techniques.

Basic Example Getting Started More Info Documentation Github Project