Re: Filesystem and free space
On Sun, Dec 12, 2021 at 02:13:19PM -0500, Polyna-Maude Racicot-Summerside wrote:
I know there's quota but what I want to ensure is simply that no user
can write to disk unless there's at least 2 GB left free on partition.
Is this possible ?
As another has mentioned, there's reserved-blocks-percentage at
filesystem creation time, but it only distinguishes between superuser
and not-superuser. But you could set the % such that the reserved space
was 2GiB that way.
Personally, I leave the reserved block quota at the default (which means
I can always do some basic things as root) and for the filesystems which
need reserved space to operate, I create an empty non-sparse file of the
appropriate size:
▶ stat /mnt/emergencySpace
File: /mnt/emergencySpace
Size: 1073741824 Blocks: 2097152 IO Block: 4096 regular file
If/when the filesystem fills up such that the operations that need space
fail, I can quickly remove the emergencySpace file, run those operations,
and then do a deeper clean-up (removed old backup increments, or whatever
has caused the fill-up).
--
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👱🏻 Jonathan Dowland
✎ jmtd@debian.org
🔗 https://jmtd.net
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