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serve nfs: implement --nfs-cache-type symlink

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`--nfs-cache-type symlink` is similar to `--nfs-cache-type disk` in
that it uses an on disk cache, but the cache entries are held as
symlinks. Rclone will use the handle of the underlying file as the NFS
handle which improves performance.
This commit is contained in:
Nick Craig-Wood
2024-10-11 17:26:29 +01:00
parent 04dfa6d923
commit 424d8e3123
6 changed files with 278 additions and 14 deletions
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4
cmd/serve/nfs/nfs.go
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@@ -145,7 +145,9 @@ that it uses an on disk cache, but the cache entries are held as
symlinks. Rclone will use the handle of the underlying file as the NFS
handle which improves performance. This sort of cache can't be backed
up and restored as the underlying handles will change. This is Linux
only.
only. It requres running rclone as root or with |CAP_DAC_READ_SEARCH|.
You can run rclone with this extra permission by doing this to the
rclone binary |sudo setcap cap_dac_read_search+ep /path/to/rclone|.
|--nfs-cache-handle-limit| controls the maximum number of cached NFS
handles stored by the caching handler. This should not be set too low