On Thu, Feb 11, 2021 at 11:48 PM Tom Seewald <tseewald@xxxxxxxxx> wrote: > > > A few more things: > > > > * btrfs-progs tools don't yet have a way to report compression > > information. While 'df' continues to report correctly about actual > > blocks used and free, both regular 'du' (coreutils) and 'btrfs > > filesystem du' will report uncompressed values. > > Are there plans for upstream to address this pretty major shortcoming in the next release of btrfs-progs? From what I can see on the btrfs wiki the user space support for compression is very rudimentary and with no real indication that it is being worked on or seen as a priority. I know there is an intent to incorporate it, I don't know the time frame. It probably belongs in 'btrfs filesystem du' but I'm not certain. Since F2FS is also doing compression, it might make sense to enhance df or du (both are coreutils). There is a tool called compsize that will be included in default installations, that will provide statistical information. Speaking for myself, it's been something of a short term novelty usage that tapers off over time. The statistics satisfy curiosity, but I've found the curiosity wanes because it doesn't affect any decision making, contrary to df, du, and ls. The behavior of du and ls is unchanged, whereas the behavior of df is that the rate of free space consumption is always the same or less compared to uncompressed. There isn't a mechanism for a program to consider 100G of free space as 200G accounting for compression. It's still just 100G, and compression maybe gets you a 50-70G file for things like binaries. And for text files it can be quite a lot. And for multimedia files you're not going to see any compression. -- Chris Murphy _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
