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A comment on Understanding Disk Usage in Linux. Parent comment

Re:Understanding Disk Usage in Linux by ifcho on Thursday September 26, 2019 @04:34PM (#21085236)
Project quotas appear to be more similar to cgroups. They are available in xfs and ext4 https://lwn.net/Articles/623835/
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Re:Understanding Disk Usage in Linux by cat199 on Thursday September 26, 2019 @08:34PM (#21087270)
The traditional 4.2BSD-style quotas (1983!) on linux also support quotas on unix groups. Not sure if you had this in mind, but anyway.

I suppose project quotas as outlined here would allow multi-group support though.

Another option could be sparsely-provisioned COW LVM volumes.

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