On Wed, Jul 8, 2020 at 1:45 PM Matthew Miller <mat...@fedoraproject.org> wrote: > > On Wed, Jul 08, 2020 at 11:37:11AM -0600, Chris Murphy wrote: > > If it's the center, I think that favors the mount option approach and > > do it with the lowest level of compression, i.e. zstd:1. But this > > suggests more benchmarking still, to make certain it's well understood > > what the range of write performance hit could be in those scenarios. > > Whereas the curated approach can just bypass most of that question - > > the payload and workload for flatpak and usr and containers is fairly > > fixed across all Fedora users rather than mixed content and workloads > > found in ~/ > > I just did some quick tests out of curiousity. I tarred up /usr on my > system, resulting in a 9.8GB file. Ran this in my home dir on a > run-of-the-mill Western Digital SSD.
Btrfs uses a cheap entropy estimator to decide if it should even try to compress blocks. So it won't always do it. Hence results like this: $ sudo compsize /usr Processed 204133 files, 108496 regular extents (114715 refs), 101700 inline. Type Perc Disk Usage Uncompressed Referenced TOTAL 57% 3.2G 5.7G 6.2G none 100% 1.8G 1.8G 1.9G zstd 36% 1.3G 3.8G 4.3G -- Chris Murphy _______________________________________________ devel mailing list -- email@example.com To unsubscribe send an email to devel-le...@lists.fedoraproject.org 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://firstname.lastname@example.org