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document snapshot usage #2178
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@ -1374,6 +1374,11 @@ class Archiver:
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potentially decreases reliability of change detection, while avoiding always reading
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all files on these file systems.
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The mount points of filesystems or filesystem snapshots should be the same for every
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creation of a new archive to ensure fast operation. This is because the file cache that
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is used to determine changed files quickly uses absolute filenames.
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If this is not possible, consider creating a bind mount to a stable location.
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See the output of the "borg help patterns" command for more help on exclude patterns.
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See the output of the "borg help placeholders" command for more help on placeholders.
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""")
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@ -422,7 +422,7 @@ BORG_FILES_CACHE_TTL to at least 26 (or maybe even a small multiple of that),
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it would be much faster.
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Another possible reason is that files don't always have the same path, for
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example if you mount a filesystem without stable mount points for each backup.
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example if you mount a filesystem without stable mount points for each backup or if you are running the backup from a filesystem snapshot whose name is not stable.
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If the directory where you mount a filesystem is different every time,
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|project_name| assume they are different files.
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