Jacob Tomlinson • 4/15/2016

A note on AWS disk performance testing

This technical article details a key AWS EBS performance consideration: volumes restored from snapshots have blocks erased on first access for security, causing slower initial read/write speeds. It explains the underlying reason (preventing data leakage) and provides a practical solution using the `dd` command to read the entire disk, triggering all block resets upfront for accurate performance benchmarking or high-performance application needs.

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#storage #cloud computing #aws