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2023-07-14 14:01:23 +02:00
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# BTRFS can and will eat your CPU and MEM
# Keywords
* Debian 10 64bit AMD homebuild NAS
* Only 4gb of RAM
* Shoot yourself in the foot without swap please (when the thing is busy)
* Gigabyte D525TUD with Intel Atom D525 @ 1.8GHz 64bit quadcore CPU
* BTRFS filesystem for snapshots and data integrity
* btrfs-cleaner kernel process
* "hack" -> `btrfs quota disable /data`
* btrfs stats (e.g quota groups) use [qgroup feature](https://btrfs.readthedocs.io/en/latest/btrfs-qgroup.html) which seems to be unstable in kernel 4.14 mainline, no clue i'm affected as my debian runs 4.19
* https://btrfs.wiki.kernel.org/index.php/Quota_support
* https://lore.kernel.org/linux-btrfs/YeVawBBE3r6hVhgs@debian9.Home/T/
* https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/btrfs-cleaner-frequently-stuck-at-100-CPU-after-6-4-0-upgrade/td-p/990419/page/2
* https://github.com/digint/btrbk
* https://wiki.gentoo.org/wiki/Btrbk