Load-Aware Replay of I/O Traces

Trace replay is one of the commonly used techniques in benchmarking I/O systems. However it is still not obvious if trace replay faithfully preserves important characteristics of the original application. While this may not be a significant problem when traces are collected and replayed in a same or similar system environment, many issues arise when traces are replayed in a different kind of environment than the one used during the trace collection process. In this work-in-progress, we present a novel mode of I/O trace replay called Load-based replay that aims to preserve the same I/O load pattern of original application traces irrespective of the system it is replayed.