ba4218ea98
Use 4k blocks for the ext4 filesystem. Run fsck on the filesystem to make sure deleted blocks are actually zeroed, and pass -Xbcj to mksquashfs. 4k blocks and -Xbcj decreases the size by 2-6% depending on the filesystem size. Zeroing the blocks of the ext4 fs improves things dramatically. The problem is that DNF downloads the rpms before installing them. In addition to forcing us to use a larger filesystem than we would like it leaves data that is difficult to compress on the image. The downloaded files are removed, but need to be zeroed out so that mksquashfs can compress it. |
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