On Wed, May 13, 2020 at 5:32 AM Bohdan Khomutskyi <bkhomuts@xxxxxxxxxx> wrote: > > Hello, > > It was a long time since the last message in this change proposal. > > Recently I was working to reduce the impact of the increased compression ratio on the installation image size for Fedora. I have achieved outstanding results -- working proof of concept. With the following change: https://github.com/rhinstaller/anaconda/pull/2292 , not only the higher compression does not impact the installation time. In certain cases, the installation time is even reduced. This is because of the fact the filesystem internal structure aware process is used to install the system from the SquashFS. The new process also allows for taking advantage of the multi-core architecture of the system during installation -- does the decompression on multiple processors in parallel. > > The combination of https://github.com/rhinstaller/anaconda/pull/2292 and https://fedoraproject.org/wiki/Category:Changes/OptimizeSquashFS should reduce _both_ the image size and the installation time. The installation time will be reduced in case the system is installed from the SquashFS. This is the case in Fedora Workstation. > > For optimization of the SquashFS, I will work on requesting the support of the required functionality in the Pungi compose build software. Hi, since the feedback was that a higher emphasis be placed on install time being reduced, even if there was some increase in ISO size (not without limit, it's a balancing act), I'm still curious how the change compares when using zstd, all other things being equal. For example Solus recently changed from xz to zstd in squashfs, and claim 3-4x faster install times, with some increase in image size. https://getsol.us/2020/01/25/solus-4-1-released/ -- 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
