Public bug reported:
Suppose I have a fresh compressed qcow2 image. After some time the data
were recorded without compression. I decide to make "QEMU-IMG convert"
for that image to reduce its size.
I want a new option, which selects between the two algorithms overdriven images:
1. extract all / compress again when converting images (in the current
implementation)
2. compress only uncompressed blocks and just copy the compressed blocks
without re-compression.
This option is only needed when converting compressed image to
compressed and the compression algorithm is the same.
** Affects: qemu
Importance: Undecided
Status: New
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[Feature request] qemu-img option about recompressing
https://bugs.launchpad.net/bugs/603878
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Status in QEMU: New
Bug description:
Suppose I have a fresh compressed qcow2 image. After some time the data were
recorded without compression. I decide to make "QEMU-IMG convert" for that
image to reduce its size.
I want a new option, which selects between the two algorithms overdriven images:
1. extract all / compress again when converting images (in the current
implementation)
2. compress only uncompressed blocks and just copy the compressed blocks
without re-compression.
This option is only needed when converting compressed image to compressed and
the compression algorithm is the same.
