blkreplay
summary
blkreplay is a toolkit that replays block-level I/O traces (captured with blktrace) to reproduce real-world storage workloads for benchmarking. The talk covers how blkreplay works, the variety of recorded block-layer loads from an ISP (webhosting, databases, backups), and how applying these traces to commercial and open-source/commodity storage hardware and software reveals their performance and behavioral differences.
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