The ADvanced Systems Laboratory (ADSL)
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Explicit Control in a Batch-Aware Distributed File System
John Bent,
Douglas Thain,
Andrea C. Arpaci-Dusseau,
Remzi H. Arpaci-Dusseau,
Miron Livny
Department of Computer Sciences,
University of Wisconsin-Madison
Abstract:
We present the design, implementation, and evaluation of the Batch-Aware Distributed File System (BAD-FS), a system designed to orchestrate large, I/O-intensive batch workloads on remote computing clusters distributed across the wide area. BAD-FS consists of two novel components: a storage layer that exposes control of traditionally fixed policies such as caching, consistency, and replication; and a scheduler that exploits this control as necessary for different workloads. By extracting control from the storage layer and placing it within an external scheduler, BAD-FS manages both storage and computation in a coordinated way while gracefully dealing with cache consistency, fault-tolerance, and space management issues in a workload-specific manner. Using both microbenchmarks and real workloads, we demonstrate the performance benefits of explicit control, delivering excellent end-to-end performance across the wide-area.
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