On Fri, 2020-06-26 at 14:04 -0500, Michael Catanzaro wrote: > [...] > > Surely if xfs is good enough for RHEL, and btrfs is > at least 10x more reliable than xfs, that suggests btrfs should This is a good argument for having Fedora officially support BtrFS as a possible installation option, yes; but a _default_ filesystem needs to be absolutely tried-and-true, and I believe that BtrFS has not yet been put through its paces well enough for this. Ext4 should remain the default FS for now. BtrFS might have significant feature advantage over Ext4, yes; but so far it has only seen production use from a handful of companies, and even then, not for very long. (The BtrFS wiki page [1] lists most of these users only as of late-2018 -- just under two years.) In contrast to this, Ext4 has been the default FS in many enterprise systems for well over a decade: For instance, Google transitioned its systems to Ext4 in January 2010 [2], and transitioned Android to Ext4 in December 2010 [3]. And most modern Linux distros made Ext4 their default filesystem at around the same time. Moreover, putting aside any issues of stability, Ext4 peformance and interactivity continues to beat that of BtrFS except in very specific scenarios. For example, in this December 2019 Phoronix benchmark [4], BtrFS was better under some RAID setups, but consistently slightly worse than Ext4 for the single disk use cases; and considering that most desktops and laptops (minus some workstation-class PCs and laptops, like a ThinkPad P-series perhaps) use single disks instead of RAID arrays, it does not make sense yet to suggest a default filesystem that will hamper performance at the cost of features (like support for 16 EiB volumes and snapshots) that most users will probably not use or care about. In summary: Yes, it would be very cool for Fedora to support BtrFS; but it should not yet be the default filesystem. It still needs a lot of time to mature and stabilize. [1] htps://btrfs.wiki.kernel.org/index.php/Production_Users [2] https://lists.openwall.net/linux-ext4/2010/01/04/8 [3] https://thunk.org/tytso/blog/2010/12/12/android-will-be-using-ext4-starting-with-gingerbread/ [4] https://www.phoronix.com/scan.php?page=article&item=linux54-hdd-raid -- Peter Gordon (codergeek42) <peter@xxxxxxxxxxxxxxxx> Who am I? :: http://thecodergeek.com/about-me
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