MSIS: Meta-scheduler Infornation Service for Resource Performance Predictors

Contemporary Grid monitoring services lack the functionality to monitor batch-schedulers´ job queue information and the status of jobs submitted. Moreover, the monitored data delivered by them is only virtually real-time. The former implies that these services are not capable of monitoring a batch-scheduler´s inability to process a particular job. The latter implies that the strategies based solely upon the currency of monitored information can lead to delayed, if not wrong, scheduling and management decisions. Batch-scheduler monitoring is fundamentally imperative for future resource performance predictions that help meta-schedulers in deciding optimal schedules for deadline-constrained jobs. We have developed a meta-scheduler information service (MSIS), which monitors the batch-schedulers for up-to-date information about their job queues, current status of the jobs and the underlying resources. MSIS can be used in its two totally independent modes: as a retrofit API library to enhance capabilities of contemporary grid monitoring services and as a web service. It, in combination with any grid monitoring service, provides comprehensive information which can be used in estimating a resource´s future state over a limited period of time.