Am 20.06.2012 19:41, schrieb Gregory Maxwell: > On Wed, Jun 20, 2012 at 1:25 PM, Jef Spaleta <jspaleta@xxxxxxxxx> wrote: >> As a sysadmin...for a multi-seat configuration in a home network >> environment...do I really need to anticipate maximum large file tmp >> usage in calculating my swap partition size for my multi-user family? >> 8 gigs of ram... so to be safe I want to set up a swap of what...100 >> gigs to account for a potentially large /tmp of some maximum size? > > This is an issue you have independent of tmpfs. How big does / need > to be? (or if /tmp is on another volume due to the fragmentation mess > it creates, how big does that volume need to be) the huge difference between swapping and the size of swap or have /tmp on the normal file-system is that SWAP is dead space allocation and mostly useless on modern machines a reserve on / for installed new applications, logfiles, /tmp and whatever will there be stored can be used in a mixed workload for EVERYTHING (data, tmp, logs...) normally you know how much space you need for your target-setup and allocate around 2xneeded space for rootfs your /tmp on tmpfs is only wasting space allocations and/or memory or your system simply crashs - you are also missing that if /tmp get's full and is on rootfs there are 5% reserved for root, so NOTHING happens to your system you can not repair easily if you system starts to swap because a large file in tmpfs and swap is full your machine crashs, you have no way to do anything and in the worst c ase you will lose data until now NOBODY was able to explain a real-world benefit for /tmp on tmpfs as argument for make it a default and i more and more refuse to undrsatnd how decisions are made in Fedora _____________________ this all feels like: * one person has a idea late at night * the person makes a proposal * some people do not understand anything and says "why not" * the "feature" is approved
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