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Benchmarking Storage Systems with blkreplay

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Benchmarking Storage Systems with blkreplay
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90
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CC Attribution 2.0 Belgium:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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How to reliably evaluate storage systems The blkreplay toolkit replays I/O-loads on storage systems on the block-level. This allows measurements and comparisons of storage systems under close-to-real-life conditions. With this tool deep insights into workloads and storage systems can be obtained easily. The blkreplay toolkit was developed by 1&1 Internet AG in order to reproduce natural loads, recorded via blktrace in our data centers. It automates large laboratory projects, e.g. benchmarking comparisons of a wide variety of storage hardware and its multi-dimensional parameter space. The presentation will explain how the blkreplay toolkit works and discuss the block layer storage loads that have been recorded on various servers of a large ISP. The loads available cover a large range of applications including for example webhosting, databases and backup servers. The application of these loads to commercial and open source / commodity storage systems has led to a deep insight into their behaviour. Some of which are surprising and eye-opening. Finally it will be shown that OpenSource based hard- and software systems can compete with commercial ones in many areas, provided that certain conditions are met.