releasenotes/notes/make-disk-image-conversion-faster-c4abe83ae702888b.yaml


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---
fixes:
  - |
    By using ``writeback`` QEMU cache mode, make Nova's disk image
    conversion (e.g. from raw to QCOW2 or vice versa) dramatically
    faster, without compromising data integrity.  `Bug 1818847`_.

    .. _Bug 1818847: https://bugs.launchpad.net/nova/+bug/1818847