Date: Tue, 15 Aug 2000 12:20:20 -0400 From: "Allen Pulsifer" <pulsifer@mediaone.net> To: <freebsd-hackers@FreeBSD.ORG> Cc: <dillon@FreeBSD.ORG> Message-ID: <NBBBJNDFEKPEHPFCLNLHCEFBHNAA.pulsifer@mediaone.net>
next in thread | raw e-mail | index | archive | help
I am trying to figure out what to do with my /tmp directory under FBSD 4.1 I noticed that /tmp currently lives on the root file system, where I am unable to get the benefit of softupdates or mounting "nosuid". (Is that true?) The handbook mentions mounting the swap partition on /tmp using the MFS. To quote from http://www.freebsd.org/handbook/kernelconfig-config.html: --------------------------------------------------------------------------- options MFS #Memory Filesystem options MD_ROOT #MD is a potential root device This is the memory-mapped filesystem. This is basically a RAM disk for fast storage of temporary files, useful if you have a lot of swap space that you want to take advantage of. A perfect place to mount an MFS partition is on the /tmp directory, since many programs store temporary data here. To mount an MFS RAM disk on /tmp, add the following line to /etc/fstab: /dev/ad1s2b /tmp mfs rw 0 0 ---------------------------------------------------------------------------------------- I thought I had read on one of the FBSD mailing lists that the MFS is now basically obsolete. As I understood it, the regular file system has sophisticated caching built in and effectively acts like a memory file system if the files are small enough. Conversely, using the MFS results in two stages of caching and wastes RAM. Is that correct? I noticed Matt Dillon wrote a handbook section on the VM system at http://www.freeBSD.org/handbook/internals-vm.html that includes some info on tuning, but it doesn't mention what to do with /tmp. So what's the bottom line? Should I leave /tmp on the root file system, create a dedicated partition for /tmp, or mount the swap partition on /tmp using the MFS? Thanks, Allen To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?NBBBJNDFEKPEHPFCLNLHCEFBHNAA.pulsifer>