Date: Sat, 28 Apr 2012 18:13:04 +0000 From: Chris Rees <utisoft@gmail.com> To: Luke Dean <LukeD@pobox.com> Cc: freebsd-current@freebsd.org Subject: Re: Using TMPFS for /tmp and /var/run? Message-ID: <CADLo83-0Zu1cNARMbk3YMHU54O1xzMfNqGvcHdxL5xFKV6z-Zw@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.1204281042030.37187@tower.lukas.is-a-geek.org> References: <4F746F1E.6090702@mail.zedat.fu-berlin.de> <4F74BCE8.2030802@vangyzen.net> <CACM2%2B-7Ahn6J=CTASe0g48%2BSD2vvLVd_hG3DRZmvO31QszG5Xw@mail.gmail.com> <20120330.151848.41706133.sthaug@nethelp.no> <CADLo839bF5Q%2BiZ-ExQi8VhpuAmxu%2BXhvZT7hVW35FCFq_V1huA@mail.gmail.com> <alpine.BSF.2.00.1204281042030.37187@tower.lukas.is-a-geek.org>
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On 28 Apr 2012 19:04, "Luke Dean" <LukeD@pobox.com> wrote: > > > > On Fri, 30 Mar 2012, Chris Rees wrote: > >> On 30 Mar 2012 14:26, <sthaug@nethelp.no> wrote: >>> >>> >>>>> However, if you always want to use tmpfs instead of stable storage, >>>> >>>> please do not. Some people expect /tmp to be persistent. This is why >>>> /etc/defaults/rc.conf has clear_tmp_enable="NO". Changing this would >> >> break >>>> >>>> the POLA. >>>>> >>>>> >>>> This is a mistake. >>>> >>>> The default should be clear_tmp_enable="YES" >>>> if only to uncover those broken configurations that expect /tmp to be >>>> persistent. >>> >>> >>> If you want to break POLA and make a lot of people angry, sure. >>> Otherwise no. >>> >> >> I would very much like an example of where /tmp is expected to persist. >> >> Chris > > > Yes, I'm a month behind on my mailing list reading and this conversation is probably over, but I do have a personal example. > > In my periodic.conf, I have: > daily_clean_tmps_enable="YES" > daily_clean_tmps_days="30" > > I tend to have many distractions and work on many projects at the same > time. I don't always know when I'm finished. Sometimes I just lose > interest. I often don't remember to clean up after myself. > > These settings in periodic.conf allow me to set up temporary workspaces in /tmp. If I keep working on a project, my files remain. If I forget about it for a month, periodic will clean up my mess. > > If someday the default behavior were changed to make /tmp a memory-mounted filesystem or to clean it out on every reboot, I think I could set daily_clean_tmps_dirs to another directory and move my sandbox someplace else. I would very much appreciate some warning, but this would not be a problem for me. You should use /var/tmp for that, or another custom directory if you want your files safe. Chris
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