Re: 97% full system, dusage didn't help, musage strange

[Andrei Borzenkov <arvidjaar@gmail.com>]

04.01.2025 01:52, Leszek Dubiel wrote:
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> W dniu 16.12.2024 o 22:01, Qu Wenruo pisze:
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>   > If you want to be extra safe, the best solution is to use tools that
> can report the usage percentage of each block group.
>   >
>   > You need something procedure like this:
>   >
>   > start:
>   >     if (unallocated space >= 8GiB)
>   >         return;
>   > check_usage_percentage:
>   >     if (no block group has usage percentage < 30%) {
>   >         delete_files;
>   >         goto check_usage_percentage;
>   >     }
>   >     balance dusage=30
>   >     goto start;
>   >
>   > Although there are some concerns, firstly the tool, sorry I didn't
> remember the name but there is an out-of-btrfs-progs tool can do exactly
> that.
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> In btrfs-progs package I didn't find any such tool.
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> There is "btrfs maintenance" by kdave:
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>                        https://github.com/kdave/btrfsmaintenance
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> but it starts normal balance, it doesn't analize "block usage percentage".
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https://github.com/knorrie/btrfs-heatmap

https://github.com/knorrie/python-btrfs

The latter is general Python library to work with btrfs and various 
(sample) tools, like btrfs-balance-least-used or btrfs-usage-report.