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borg/docs/usage/tar.rst
Thomas Waldmann e8069a8f80 import/export-tar: --tar-format=BORG: roundtrip ALL item metadata, fixes #5830
export-tar: just msgpack and b64encode all item metadata and
            put that into a BORG specific PAX header.
            this is *additional* to the standard tar metadata.

import-tar: when detecting the BORG specific PAX header, just get
            all metadata from there (and ignore the standard tar
            metadata).
2022-04-02 22:25:44 +02:00

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.. include:: export-tar.rst.inc
.. include:: import-tar.rst.inc
Examples
~~~~~~~~
::
# export as uncompressed tar
$ borg export-tar /path/to/repo::Monday Monday.tar
# import an uncompressed tar
$ borg import-tar /path/to/repo::Monday Monday.tar
# exclude some file types, compress using gzip
$ borg export-tar /path/to/repo::Monday Monday.tar.gz --exclude '*.so'
# use higher compression level with gzip
$ borg export-tar --tar-filter="gzip -9" repo::Monday Monday.tar.gz
# copy an archive from repoA to repoB
$ borg export-tar --tar-format=BORG repoA::archive - | borg import-tar repoB::archive -
# export a tar, but instead of storing it on disk, upload it to remote site using curl
$ borg export-tar /path/to/repo::Monday - | curl --data-binary @- https://somewhere/to/POST
# remote extraction via "tarpipe"
$ borg export-tar /path/to/repo::Monday - | ssh somewhere "cd extracted; tar x"
Archives transfer script
~~~~~~~~~~~~~~~~~~~~~~~~
Outputs a script that copies all archives from repo1 to repo2:
::
for A T in `borg list --format='{archive} {time:%Y-%m-%dT%H:%M:%S}{LF}' repo1`
do
echo "borg export-tar --tar-format=BORG repo1::$A - | borg import-tar --timestamp=$T repo2::$A -"
done
Kept:
- archive name, archive timestamp
- archive contents (all items with metadata and data)
Lost:
- some archive metadata (like the original commandline, execution time, etc.)
Please note:
- all data goes over that pipe, again and again for every archive
- the pipe is dumb, there is no data or transfer time reduction there due to deduplication
- maybe add compression
- pipe over ssh for remote transfer
- no special sparse file support