Btrfs performance improvements on 5.9 kernel

Announcements and news
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New performance improvements for Btrfs on 5.9 kernel

https://www.phoronix.com/scan.php?page=news_item&px=Btrfs-Performance-Linux-5.9

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be careful on this point : repair Btrfs
there is no tools strong enough to repair in all cases

if you use raid with btfrs , use only raid1

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I’ve never needed such tools in 10 years, lucky me :wink:

Or Raid0.

On topic: good news! Would be great if btrfs had faster file deletion, because it’s slow a.f.
Some (not all) patches were backported by H. Hoffstätte for 5.8: https://github.com/hhoffstaette/kernel-patches/tree/5.8/5.8

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other type raids do not returns goods bench a bout speed of one disk no matters you groups in dm.
in this case choose an another fs is better.

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I’ve been meaning to try out btrfs but I’ve already reinstalled my system twice the past month and I am too lazy to do it again :joy: Maybe I’ll find an excuse to do it in a few more :slight_smile:

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Other filesystems cannot simply add a new device to an existing volume (bar ZFS).
In case of btrfs, it’s just a simple btrfs device add followed by a btrfs balance.

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I’ve never really had problems with btrfs, only when I was running unreliable hardware that decided to hard lockup every few hours.

Anyone use btrfs for storage? I usually do a btrfs / and Ext4 home with another Ext4 external drive.

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I use a single btrfs partition setup on my / drive, with a number of subvolumes like e.g. /home.
My data is on a separate ext4 drive as well.

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Random question. Are subvolumes kind of like dynamically allocated partitions? Like APFS does using a container disk?

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In btrfs-speak, subvolumes are “separately mountable filesystems roots”.
Or as described in the btrfs Wiki: “A Btrfs subvolume can be thought of as a POSIX file namespace”.
In contrast to traditional partitions, subvolumes are not block devices and do not appear in /dev/sdX.
Don’t know it that helps… :slight_smile:

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Yes it does! Thanks!

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Subvolumes can work as some sort of partitions, in the sense of the term “partitioning”. Sorry, English is not my native language and I don’t find the right words, maybe someone else could step in?