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"Scheduling Parallel Data Transfers in Multi-tiered Persistent Storage" by Nan Noon Noon, Janusz R. Getta et al.

Multi-tiered persistent storage provides a logical view where all available storage is distributed over a number of levels of different speeds and capacities. Efficient scheduling of parallel data transfers in multi-tiered persistent storage is a significant problem for pipelined data processing. This work considers a class of database applications implemented as sequences of operations that transfer data between persistent storage tiers. We show how to partition the sets of data transfers to reduce the number of conflicts when data transfers are performed in parallel. The paper proposes the new rule-based algorithms for allocating parallel data transfer to the processors to minimize total processing time. The new algorithms evenly distribute the workload among the processors and reduce their idle times. We describe a number of experiments that validate the efficiency of parallel data transfer plans generated by the algorithms presented in the paper. ....

Database Management Systems , Ulti Tiered Persistent Storage , Arallel Data Processing , Performance Tuning ,

"Optimization Query Processing for Multi-tiered Persistent Storage" by Nan Noon Noon, Janusz R. Getta et al.

The efficient processing of database applications by computing systems with multi-tiered persistent storage devices needs specialized algorithms to generate optimal persistent storage management plans. A correct allocation and deallocation of multi-tiered persistent storage may significantly impact the overall performance of data processing in such systems. This paper describes the new algorithms, that create persistent storage allocation plans for data processing on multi-tiered persistent storage devices. This work is based on the pipelined data processing model, and it applies a formalism of extended Petri nets to describe the data flows between the tiers of persistent storage devices. The algorithms presented in the paper perform linearization of the extended Petri nets and generate the optimal persistent storage allocation plans. The paper describes the experiments conducted to validate the generate data allocation plans for multi-tiered persistent storage devices and prove the im ....

Data Processing , Ulti Tiered Persistent Storage , Storage Management ,