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authorChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:24:58 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:27:06 +0000
commit33606b41d35115f887ea688b1a16f2ff85bf2fe4 (patch)
tree406b2c7b19a087ba437c68f3dbf0b589fa1d6150 /results/scraper/launchpad-without-comments/1881648
parentadedf8771bc4de3113041ca21bd4d0d1c0014b6a (diff)
downloadqemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.tar.gz
qemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.zip
add launchpad bug reports without comments
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+`qemu-img info` reports an incorrect actual-size when the underlying posix filesystem has transparent compression
+
+qemu-img info reports the same thing as `du`*1024:
+
+$ qemu-img info --output json ./my.qcow2  | jq '."actual-size"'
+558619648
+
+$ du ./my.qcow2
+545527	./my.qcow2
+
+$ echo $((558619648 / 545527))
+1024
+
+and this is correct in terms of bytes on disk, but due to transparent compression implemented by the filesystem, it is not the actual byte count:
+
+$ du -h --apparent-size ./my.qcow2
+1346568192	my.qcow2
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