Messages in this thread | | | Date | Fri, 22 Aug 2008 19:19:59 +0200 | From | Jörn Engel <> | Subject | Re: [PATCH 04/10] AXFS: axfs_inode.c |
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On Fri, 22 August 2008 18:08:51 +0100, Phillip Lougher wrote: > > Squashfs stores significantly more metadata than cramfs. Remember > cramfs has no support for filesystems > ~ 16Mbytes, no inode timestamps, > truncates uid/gids, no hard-links, no nlink counts, no hashed > directories, no unique inode numbers. If Squashfs didn't compress the > metadata it would be significantly larger than cramfs.
Elsewhere in this maze of threads Arnd claimed to have tested the benefits of metadata compression - and it making little impact.
My guess is that it would make a large impact if metadata would be a significant part of the filesystem image. Usually metadata is close enough to 0% to be mistaken for statistical noise. So compressing it makes a significant impact on an insignificant amount of data.
Jörn
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