Making Cloud Intermediate Data Fault-Tolerant

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Executive Summary

Parallel dataflow programs generate enormous amounts of distributed data that are short-lived, yet are critical for completion of the job and for good run-time performance. The authors call this class of data as intermediate data. This paper is the first to address intermediate data as a first-class citizen, specifically targeting and minimizing the effect of run-time server failures on the availability of intermediate data, and thus on performance metrics such as job completion time. They propose new design techniques for a new storage system called ISS (Intermediate Storage System), implement these techniques within Hadoop, and experimentally evaluate the resulting system.

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