We consider heterogeneous distributed storage systems (DSSs) having flexible reconstruction degree, where each node in the system has nonuniform repair bandwidth and capacity. In particular, a data collector can reconstruct file using some $$k$$ nodes and, for failure, be repaired by set of active nodes. Using min-cut bound, we investigate fundamental trade-off between costs our model DSS. Fur...

Efficient task scheduling is essential for obtaining high performance in heterogeneous distributed computing systems. Some algorithms have been proposed for both homogeneous and heterogeneous distributed computing systems. In this paper, a new static scheduling algorithm is proposed called Node Duplication in Critical Path (NDCP) algorithm to schedule the tasks efficiently on the heterogeneous ...

The messiahs project is investigating the construction of a set of mechanisms to support task placement in autonomous, heterogeneous, distributed systems. In this paper we explore aspects of the messiahs system that support security in distributed systems. In particular, we will concentrate on aspects of messiahs that defeat denial of service attacks, provide firewalls, protect private system d...

The German Biomedical Grid Projects at the University Medical Centers in Magdeburg and Göttingen have developed environments for distributed computing in medicine, especially with heterogeneous computing resources in different infrastructures. At the beginning it was a stand-alone computer pool installation, it was translated into virtualized environment in a sub network and finally the install...