Merge pull request #263 from trapexit/dualmount

add dual mount suggestion to mmap problem
This commit is contained in:
Antonio SJ Musumeci 2016-03-15 16:45:06 -04:00
commit 6aec6c939a

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@ -1,6 +1,6 @@
% mergerfs(1) mergerfs user manual
% Antonio SJ Musumeci <trapexit@spawn.link>
% 2016-02-21
% 2016-03-15
# NAME
@ -308,7 +308,7 @@ Find tooling to help with managing `mergerfs` at: https://github.com/trapexit/me
#### rtorrent fails with ENODEV (No such device)
Be sure to turn off `direct_io`. rtorrent and some other applications use [mmap](http://linux.die.net/man/2/mmap) to read and write to files and offer no failback to traditional methods. FUSE does not currently support mmap while using `direct_io`. There will be a performance penalty on writes with `direct_io` off but it's the only way to get such applications to work.
Be sure to turn off `direct_io`. rtorrent and some other applications use [mmap](http://linux.die.net/man/2/mmap) to read and write to files and offer no failback to traditional methods. FUSE does not currently support mmap while using `direct_io`. There will be a performance penalty on writes with `direct_io` off but it's the only way to get such applications to work. If the performance loss is too high for other apps you can mount mergerfs twice. Once with `direct_io` enabled and one without it.
#### Trashing files occasionally fails