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<H1>[Mageia-dev] [Mageia-discuss] many systemd temporary directories</H1>
<B>Colin Guthrie</B>
<A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20%5BMageia-discuss%5D%20many%20systemd%20temporary%20directories&In-Reply-To=%3C4F972512.1000708%40colin.guthr.ie%3E"
TITLE="[Mageia-dev] [Mageia-discuss] many systemd temporary directories">mageia at colin.guthr.ie
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<I>Wed Apr 25 00:11:30 CEST 2012</I>
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<PRE>'Twas brillig, and Florian Hubold at 24/04/12 22:21 did gyre and gimble:
><i> Am 24.04.2012 22:51, schrieb Colin Guthrie:
</I>>><i> 'Twas brillig, and Florian Hubold at 24/04/12 21:27 did gyre and gimble:
</I>>>><i> Am 24.04.2012 20:51, schrieb Juergen Harms:
</I>>>>><i> I just saw that systemd creates (and does not purge) lots of directories like
</I>>>>><i> /tmp/systemd-namespace-<uniqueid>/ - I now have nearly 50 of them (one
</I>>>>><i> partial explanation might be that I did quite some re-booting these last days).
</I>>>>><i>
</I>>>>><i> Nothing serious, they are small - but nevertheless ... Is this normal,
</I>>>>><i> shouldnt there be some automatic purging mechanism?
</I>>>>><i>
</I>>>>><i> Juergen
</I>>>>><i>
</I>>>><i> Maybe we should default to /tmp being on tmpfs so that
</I>>>><i> this gets purged on every reboot? This would also be more
</I>>>><i> in accordance with FHS imho.
</I>>><i> This is one of my goals for mga3 (I have it in my notes for the
</I>>><i> technical specs discussion that will come), but certainly not for mga2
</I>>><i> as this is quite a big change and some apps may have to be patched to
</I>>><i> use /var/tmp instead etc. if they store large things in there.
</I>>><i>
</I>>><i> Col
</I>>><i>
</I>>><i>
</I>><i> Well, this is what FHS says (in an ideal world it would reflect reality)
</I>><i>
</I>><i> Programs must not assume that any files or directories in /tmp are
</I>><i> preserved between invocations of the program.
</I>><i>
</I>><i> IEEE standard P1003.2 (POSIX, part 2) makes requirements that are similar
</I>><i> to the above section.
</I>><i>
</I>><i> Although data stored in /tmp may be deleted in a site-specific manner, it
</I>><i> is recommended that files and directories located in /tmp be deleted
</I>><i> whenever the system is booted.
</I>><i>
</I>><i> Just mentioned it as one possible solution to the problem at hands.
</I>
Absolutely (for once the FHS is sensible here :D).
But it's more of a practical consideration at the moment. Some apps do
indeed store large data here... so we'd need to do this kind of thing
early on in the cycle, not last minute.
I think Fedora will ultimately do this, as will SuSE, so I don't see any
problem with it in principle.
Col
--
Colin Guthrie
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