Abstract
We report on considerable extensions of the DRAGON SLAYER/ MELODY file system which significantly enhance Melody's missioncritical capabilities (hard real-time responsiveness, adaptability, dependability, graceful degradation, fault tolerance). Tim e criticality of tasks and their sensitivity with respect to latest file information are explicitly used for novel flexible task scheduling algorithms and file replication management policies, in a fully integrated model. The achieved adaptability by far outweighs the additional overhead. - In order to avoid unnecessary and very costly locking of (remote) file copies, task scheduling in the MELODY model is done prior to resource/ file allocation. Although thus being based on estimates of execution times only (no guaranteed tasks), in the 2 different models of integrating task and resource scheduling developed, MELODY distinctively outperforms the classical model, most clearly in mission-critical applications.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
