IOGrind – the simulation tool / GUI ...

• A really lame simulator ...

• • Deterministic ...
  • Lame – but Kcachegrind is useful even so.
  • the aim:
  • • Optimizing for I/O grind metrics should make I/O latency at least no worse
    • ideally rather better – at least for a given machine.

• Inputs:

• • traces (ext2dump), file-system layouts, disk model