On 24/10/2019 17:55, Theodore Y. Ts'o wrote: > On Thu, Oct 24, 2019 at 12:43:40PM +0200, Paul Menzel wrote: >> >> In our cluster, we offer scratch space for temporary files. As >> these files are temporary, we do not need any safety >> requirements – especially not those when the system crashes or >> shuts down. So no `sync` is for example needed. >> >> Are there file systems catering to this need? I couldn’t find >> any? Maybe I missed some options for existing file systems. > > You could use ext4 in nojournal mode. If you want to make sure that > fsync() doesn't force a cache flush, you can mount with the nobarrier > mount option. > And open the file with O_TMPFILE|O_EXCL so there is no metadata as well. I think xfs for O_TMPFILE|O_EXCL does not do any fsync, but I'm not sure > - Ted >
