Changes To QEMU discs, drivers and performance
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Initial version of "QEMU discs, drivers and performance"


















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Image formats
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The more features has disk image format, the less performarnce it delivers.

* **qcow2** most featureful format. Supports snapshots, vm state saving etc etc

* **qed** less featureful and somewhat faster

* **raw** almost np features, mpst space occupied but fastest.


virtio drivers
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TBD