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[Qemu-devel] [Bug 601946] Re: [Feature request] qemu-img multi-threaded
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From: |
Quentin Casasnovas |
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Subject: |
[Qemu-devel] [Bug 601946] Re: [Feature request] qemu-img multi-threaded compressed image conversion |
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Date: |
Sat, 21 Jan 2017 09:20:33 -0000 |
That was also my feeling, so nice to get a confirmation!
Another related thing would be to allow qemu-nbd to write compressed
blocks its backing image - today if you use a qcow2 with compression,
any block which is written to gets uncompressed in the resulting image
and you need to recompress the image offline with qemu-img.
Would you have any pointers/documentation on how best to implement this
so both qemu-img and qemu-nbd can use multithreaded compressed writes ?
I'm totally new to qemu block subsystem.
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https://bugs.launchpad.net/bugs/601946
Title:
[Feature request] qemu-img multi-threaded compressed image conversion
Status in QEMU:
New
Bug description:
Feature request:
qemu-img multi-threaded compressed image conversion
Suppose I want to convert raw image to compressed qcow2. Multi-
threaded conversion will be much faster, because bottleneck is
compressing data.
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