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Add more apps to section on sqlite3 mmap problems

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Antonio SJ Musumeci 2023-01-29 23:56:50 -05:00
parent 3d73c6a596
commit ac4e097511
2 changed files with 25 additions and 4 deletions
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21
README.md
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@ -1,6 +1,6 @@
% mergerfs(1) mergerfs user manual
% Antonio SJ Musumeci <trapexit@spawn.link>
% 2023-01-26
% 2023-01-29
# NAME
@ -1047,9 +1047,24 @@ Be sure to set `cache.files=partial|full|auto-full` or turn off `direct_io`. rto
#### Plex doesn't work with mergerfs
It does. If you're trying to put Plex's config / metadata / database on mergerfs you can't set `cache.files=off` because Plex is using sqlite3 with mmap enabled. Shared mmap is not supported by Linux's FUSE implementation when page caching is disabled. To fix this place the data elsewhere (preferable) or enable `cache.files` (with `dropcacheonclose=true`). Sqlite3 does not need mmap but the developer needs to fall back to standard IO if mmap fails.
It does. If you're trying to put Plex's config / metadata / database
on mergerfs you can't set `cache.files=off` because Plex is using
sqlite3 with mmap enabled. Shared mmap is not supported by Linux's
FUSE implementation when page caching is disabled. To fix this place
the data elsewhere (preferable) or enable `cache.files` (with
`dropcacheonclose=true`). Sqlite3 does not need mmap but the developer
needs to fall back to standard IO if mmap fails.
If the issue is that scanning doesn't seem to pick up media then be sure to set `func.getattr=newest` though generally a full scan will pick up all media anyway.
This applies to other software: Radarr, Sonarr, Lidarr, Jellyfin, etc.
I would recommend reaching out to the developers of the software
you're having troubles with and asking them to add a fallback to
regular file IO when mmap is unavailable.
If the issue is that scanning doesn't seem to pick up media then be
sure to set `func.getattr=newest` though generally a full scan will
pick up all media anyway.
#### When a program tries to move or rename a file it fails

8
man/mergerfs.1
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@ -1,7 +1,7 @@
.\"t
.\" Automatically generated by Pandoc 2.9.2.1
.\"
.TH "mergerfs" "1" "2023-01-26" "mergerfs user manual" ""
.TH "mergerfs" "1" "2023-01-29" "mergerfs user manual" ""
.hy
.SH NAME
.PP
@ -2054,6 +2054,12 @@ To fix this place the data elsewhere (preferable) or enable
Sqlite3 does not need mmap but the developer needs to fall back to
standard IO if mmap fails.
.PP
This applies to other software: Radarr, Sonarr, Lidarr, Jellyfin, etc.
.PP
I would recommend reaching out to the developers of the software
you\[cq]re having troubles with and asking them to add a fallback to
regular file IO when mmap is unavailable.
.PP
If the issue is that scanning doesn\[cq]t seem to pick up media then be
sure to set \f[C]func.getattr=newest\f[R] though generally a full scan
will pick up all media anyway.