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JAB,
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<div class="">Our scratch filesystem uses user and group quotas. It started out as a traditional scratch filesystem but then we decided (for better or worse) to allow groups to purchase quota on it (and we don’t purge it, as many sites do).</div>
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<div class="">We have many users in multiple groups, so if this is not working right it’s a potential issue for us. But you’re right, I’m a nobody…</div>
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<div class="">Kevin</div>
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<div class="">On Aug 3, 2016, at 2:13 PM, Jonathan Buzzard <<a href="mailto:jonathan@buzzard.me.uk" class="">jonathan@buzzard.me.uk</a>> wrote:</div>
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<div class="">On 03/08/16 19:34, Buterbaugh, Kevin L wrote:<br class="">
<blockquote type="cite" class="">Hi Jaime / Sven,<br class="">
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If Jaime’s interpretation is correct about user1 continuing to be able<br class="">
to write to “group2” files even though that group is at their hard<br class="">
limit, then that’s a bug that needs fixing. I haven’t tested that<br class="">
myself, and we’re in a downtime right now so I’m a tad bit busy, but if<br class="">
I need to I’ll test it on our test cluster later this week.<br class="">
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Even if Jamie's interpretation is wrong it shows the other massive failure of group quotas under Unix and why they are not fit for purpose in the real world.<br class="">
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So bufh here can deliberately or accidentally do a denial of service on other users and tracking down the offending user is a right pain in the backside.<br class="">
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The point of being able to change group ownership on a file is to indicate the massive weakness of the whole group quota system, and why in my experience nobody actually uses it, and "project" quota options have been implemented in many "enterprise" Unix file
systems.<br class="">
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JAB.<br class="">
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-- <br class="">
Jonathan A. Buzzard Email: jonathan (at) <a href="http://buzzard.me.uk" class="">
buzzard.me.uk</a><br class="">
Fife, United Kingdom.<br class="">
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<div class="">—</div>
<div class="">Kevin Buterbaugh - Senior System Administrator</div>
<div class="">Vanderbilt University - Advanced Computing Center for Research and Education</div>
<div class=""><a href="mailto:Kevin.Buterbaugh@vanderbilt.edu" class="">Kevin.Buterbaugh@vanderbilt.edu</a> - (615)875-9633</div>
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