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From: Thomas Huth <>
Subject: [Bug 603878] Re: [Feature request] qemu-img option about recompressing
Date: Thu, 22 Apr 2021 03:53:26 -0000	[thread overview]
Message-ID: <> (raw)

The QEMU project is currently considering to move its bug tracking to another system. For this we need to know which bugs are still valid and which could be closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state back to "New" within the next 60 days, otherwise this report will be marked as "Expired". Or mark it as "Fix Released" if the problem has been solved with a newer version of QEMU already. Thank you and sorry for the inconvenience.

** Changed in: qemu
       Status: New => Incomplete

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  [Feature request] qemu-img option about recompressing

Status in QEMU:

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.

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  parent reply	other threads:[~2021-04-22  4:08 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-10  7:06 [Qemu-devel] [Bug 603878] [NEW] [Feature request] qemu-img option about recompressing Коренберг Марк
2010-07-10  7:19 ` [Qemu-devel] [Bug 603878] " Коренберг Марк
2016-11-09 20:25 ` Thomas Huth
2021-04-22  3:53 ` Thomas Huth [this message]
2021-04-22  5:47 ` Коренберг Марк
2021-05-02  5:16 ` Thomas Huth

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