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Orted is a software tool developed by the Open MPI (Open Message Passing Interface) project. It is designed to manage and monitor the execution of parallel applications that use the Message Passing Interface (MPI) standard. Orted, short for "OpenRTE Daemon," serves as the runtime environment for MPI applications, handling tasks such as process spawning, communication setup, and resource management.

The primary function of orted is to facilitate the initialization and coordination of MPI processes across a distributed computing environment. It works in conjunction with other Open MPI components, such as the OpenRTE (Open Runtime Environment) and the MPI library, to ensure that parallel applications can efficiently utilize the available computational resources.

Orted supports various launch methods, including rsh, ssh, and slurm, allowing it to operate in different computing environments, from local machines to high-performance computing clusters. It also provides mechanisms for fault tolerance and checkpointing, enhancing the reliability of MPI applications.

In summary, orted is a crucial component of the Open MPI ecosystem, enabling the seamless execution of parallel applications by managing the underlying infrastructure and ensuring efficient communication between processes.