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@ -167,7 +167,11 @@ These options are the same regardless of whether you use them with the |
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longer need the data and it can drop its cache. Recommended when |
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**cache.files=partial|full|auto-full|per-process** to limit double |
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caching. (default: false) |
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* **direct-io-allow-mmap=BOOL**: On newer kernels (>= 6.6) it is |
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* **passthrough=BOOL**: On Linux 6.9 and above passthrough allows for |
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near native IO performance. cache.files=off will disable passthrough |
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but if direct-io-allow-mmap=true then mmap will be |
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passthroughed. `moveonenospc` will no longer function. |
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* **direct-io-allow-mmap=BOOL**: On Linux 6.6 and above it is |
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possible to disable file page caching while still allowing for |
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shared mmap support. mergerfs will enable this feature if available |
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but an option is provided to turn it off for testing and debugging |
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@ -1664,6 +1668,8 @@ over the suggestions below (including the benchmarking section.) |
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NOTE: be sure to read about these features before changing them to |
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understand what behaviors it may impact |
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* test theoretical performance using `nullrw` or mounting a ram disk |
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* enable `passthrough` |
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* disable `security_capability` and/or `xattr` |
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* increase cache timeouts `cache.attr`, `cache.entry`, `cache.negative_entry` |
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* enable (or disable) page caching (`cache.files`) |
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@ -1675,7 +1681,6 @@ understand what behaviors it may impact |
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* change the number of worker threads |
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* disable `posix_acl` |
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* disable `async_read` |
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* test theoretical performance using `nullrw` or mounting a ram disk |
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* use `symlinkify` if your data is largely static and read-only |
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* use tiered cache devices |
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* use LVM and LVM cache to place a SSD in front of your HDDs |
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@ -1879,7 +1884,7 @@ more details. |
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#### rtorrent fails with ENODEV (No such device) |
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Be sure to set |
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`cache.files=partial|full|auto-full|per-processe`. rtorrent and some |
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`cache.files=partial|full|auto-full|per-process`. rtorrent and some |
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other applications use [mmap](http://linux.die.net/man/2/mmap) to read |
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and write to files and offer no fallback to traditional methods. FUSE |
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does not currently support mmap while using `direct_io`. There may be |
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Antonio SJ Musumeci
7 months ago