Date: Fri, 13 Dec 2024 14:19:24 -0700 From: Alan Somers <asomers@freebsd.org> To: Ed Maste <emaste@freebsd.org> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Switching release media dist sets to .tzst (tar + zstd)? Message-ID: <CAOtMX2ikQHYJ0VhA5C54SqDykzrOS0Fg%2BFdijOkM3P3LSUcQPA@mail.gmail.com> In-Reply-To: <CAPyFy2AXee_Y2xei176VAcW6peC0x=waxfPap%2B3uGG2o%2Bynv-A@mail.gmail.com>
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On Fri, Dec 13, 2024 at 2:16 PM Ed Maste <emaste@freebsd.org> wrote: > > I have been reviewing parts of the release artifact build process, > including ISO and memstick images, and came across the distribution > sets (e.g., base.txz, src.txz) used by the installer to populate new > file systems. I’d like to discuss switching these to .tzst (tar + > zstd) compression. > > While I haven’t yet conducted detailed benchmarks comparing zstd and > xz specifically for this use case, here are some initial > considerations: > > Pros of zstd: > - Faster compression and decompression speeds. > - Aligns with the compression method used for FreeBSD packages. > > Cons of zstd: > - Somewhat larger compressed file sizes. > - Requires updates to tools that interact with distribution sets. > - May have limited availability on some other operating systems (?). > > I have a review open to demonstrate the extent of the change in the > build system & installer: https://reviews.freebsd.org/D48042 > > It might be that this is not worth pursuing, as dist sets will most > likely go away with the migration to pkgbase, but I would like to > discuss and make an explicit decision. We can separately consider > compression on the release media images themselves. > > Feedback Requested: > > Is there support for this idea? Are there objections to pursuing this? > Are there other factors I should consider, especially compatibility concerns? Even with a good internet connection, I usually find that downloading the tarballs is slower than decompressing them. So I vote to stick with xz.home | help
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