Re: Action required: Rawhide: /tmp is now on tmpfs
On 06/01/2012 11:52 AM, Alexey I. Froloff wrote:
On Fri, Jun 01, 2012 at 11:31:21AM -0400, Brian Wheeler wrote:Well, since I'm probably going to turn it off, can someone give me a good reason why it should be turned _on_ by default? For me, the "Benefit to Fedora" bullets are not compelling.One good reason is to separate /tmp from /. When choosing between failed sort and failed passwd (or anything else, that modifies files in /), both because of "No space left on device" error I prefer failed sort and working passwd.
Wouldn't the things which modify important stuff in / be running as root? If so, they'd get that 5% to play with. In any case, I see your point. However, I can't say that it has happened to me since the days of 32M roots :)
And tmpfs is faster than any other filesystem, and easily resized both ways.
Not really, though. You have to muck with adding and removing swap partitions if you have workload that is biggish. I keep a 2G swap on all of my systems so /tmp as tmpfs is going to do poorly on them and since the disk is pretty much allocated elsewhere I can't just move files around to get more /tmp (or / if things are going wonky). How would an upgrade deal with that situation? Its very much like the traditional commercial unixes which would have a separate filesystem for everything: free space was never in the place where you actually needed it.
I'll grant that tmpfs is faster than other filesystems, but is it a win on a real workload? I haven't seen anyone answer that.
It seems like this feature is trading a set of well-known problems for a different set of problems without a killer reason.
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