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List:       fedora-devel-list
Subject:    Re: Fedora 33 System-Wide Change proposal: Make btrfs the default file system for desktop variants
From:       "Tom Seewald" <tseewald () gmail ! com>
Date:       2020-07-10 18:11:34
Message-ID: 20200710181134.450.6974 () mailman01 ! iad2 ! fedoraproject ! org
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> It doesn't use compression so not relevant to the cited statement?

Well the paper compares  ext2, ext4, xfs, f2fs, and btrfs in terms of IO \
amplification and states: "In fact, in all our experiments, btrfs was an outlier, \
producing the highest read, write, and space amplification."  
The results listed in Tables 1 and 2 show that btrfs does incur higher amounts of IO, \
so even with compression it's not at all obvious that this would bring btrfs down to \
levels comparable to (or lower than) the other file systems. Hence I believe Vitaly \
is linking this paper to suggest that evidence is needed before we can confidently \
assert that btrfs + compression is better at preserving nand than using ext4 or xfs. \
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