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Robert Bradford, Evangelos Kotsovinos, Anja Feldmann, Harald Schiöberg - page 12 / 24

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Implementation – Write Throttling

If the VM attempts to complete more writes than a given threshold value, future write attempts are delayed by the block driver.

This process repeats, with the delay and threshold doubling each time.

Experimentally, 16384 is a suitable threshold with a delay of 2048 μs also being good.

Enforcement is separated from policy for extensibility.

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