Function for mirroring a filesystem.
Mirroring will create a copy of a source filesystem on a destination filesystem. If there are no files on the destination, then mirroring is simply a straight copy. If there are any files or directories on the destination they may be deleted or modified to match the source.
In order to avoid redundant copying of files,
mirror can compare
timestamps, and only copy files with a newer modified date. This
timestamp comparison is only done if the file sizes are different.
This scheme will work if you have mirrored a directory previously, and
you would like to copy any changes. Otherwise you should set the
copy_if_newer parameter to
False to guarantee an exact copy, at
the expense of potentially copying extra files.
mirror(src_fs, dst_fs, walker=None, copy_if_newer=True, workers=0)¶
Mirror files / directories from one filesystem to another.
Mirroring a filesystem will create an exact copy of
dst_fs, by removing any files / directories on the destination that aren’t on the source, and copying files that aren’t.
- src_fs (FS or str) – Source filesystem (URL or instance).
- dst_fs (FS or str) – Destination filesystem (URL or instance).
- walker (Walker, optional) – An optional walker instance.
- copy_if_newer (bool) – Only copy newer files (the default).
- workers (int) – Number of worker threads used (0 for single threaded). Set to a relatively low number for network filesystems, 4 would be a good start.