apteryx pushed a commit to branch master
in repository guix.
commit a0941c14ef185d3d177ad132385992c1b7d36818
Author: Maxim Cournoyer <[email protected]>
AuthorDate: Wed Apr 30 16:38:15 2025 +0900
image: Create zstd-compressed qcow2 images.
This should be about twice as fast as the default zlib compressor used for
qcow2, and potentially multi-thread aware given some improvements to
qemu-img
in the future (zstd supports its but it's not currently used by QEMU).
* gnu/build/image.scm (convert-disk-image): Specify 'compression_type=zstd'
option.
Change-Id: Ie9c66f0c13e789ec863c95a5e549f035b6a17bf9
---
gnu/build/image.scm | 1 +
1 file changed, 1 insertion(+)
diff --git a/gnu/build/image.scm b/gnu/build/image.scm
index e6cc2d0640..2eb2ebd217 100644
--- a/gnu/build/image.scm
+++ b/gnu/build/image.scm
@@ -181,6 +181,7 @@ ROOT directory to populate the image."
;; The maximum number of co-routines is 16.
"-m" (number->string (min 16 (parallel-job-count)))
"-O" "qcow2"
+ "-o" "compression_type=zstd"
image output))
(else
(copy-file image output))))
