(setting bug back to New because I don't see any request for
information)
** Changed in: systemd (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/2019026
Title:
systemd /tmp cleaning is suboptimal
Status in systemd package in Ubuntu:
New
Bug description:
Historically on Debian and Ubuntu, before systemd, the default
handling of /tmp was to periodically, and at boot, remove all
files/directories older than 30 days; and leave other contents alone.
With the move to systemd, the "default" (really, hard-coded in
/usr/lib/tmpfiles.d/tmp.conf) is to not clean /tmp periodically, but
at boot to remove all contents.
This is suboptimal for two reasons.
By cleaning /tmp *only* at boot, if a system makes heavy use of /tmp
and has lots of inodes under it, possibly due to failures of some
process to clean up after itself, at boot the system will be
unavailable for an unnecessarily long time while these files are
removed.
By cleaning *all* files under /tmp, this makes a reboot an Event where
in-progress files may be unnecessarily lost.
While the FHS does not *guarantee* that files under /tmp will persist
across boot (because /tmp may be a tmpfs), it also does not *require*
that /tmp be cleared on boot.
Although data stored in /tmp may be deleted in a site-specific
manner, it is recommended that files and directories located in
/tmp be deleted whenever the system is booted.
FHS added this recommendation on the basis of historical
precedent and common practice, but did not make it a
requirement because system administration is not within the
scope of this standard.
I therefore believe the correct value for /usr/lib/tmpfiles.d/tmp.conf
to restore past behavior is 'd /tmp 1777 root root 30d'.
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