spew - 1.0.8-1.2 main

Spew is used to measure I/O performance of character devices, block
devices, and regular files. It can also be used to generate high I/O loads
to stress systems while verifying data integrity.
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Spew is easy to use and is flexible. No configuration files or
complicated client/server configurations are needed. Spew also generates
its own data patterns that are designed to make it easy to find and debug
data integrity problems.