On the Design and Performance of Remote Disk Drivers for Clusters of PCs
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Overview: This paper presents the design and performance of remote disk drivers for clusters of Commodity-Off-The-Shelf PCs that fetch disk blocks over System Area Networks (SAN). The driver offers a flexible interface, being capable to logically act either as computer- or network-attached storage. An event-driven asynchronous block delivery mode of operation helps making the most out of the available parallelism by overlapping request processing with block delivery at both involved nodes and thus yielding better performance than local disks.