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calmh merged 2 commits into from
Apr 26, 2026
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feat(config): block indexing #1005

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feat(config): block indexing
calmh Apr 26, 2026
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calmh Apr 26, 2026
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11 changes: 11 additions & 0 deletions users/config.rst
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Expand Up @@ -619,6 +619,17 @@ The following child elements may exist:
devices when this is set to ``true``. See
:doc:`/advanced/folder-send-xattrs` for more information.

.. option:: folder.blockIndexing

.. versionadded:: 2.1.0

Whether to use block indexing for the folder; defaults to ``true`` for
send-only and receive-only folders. Block indexing makes it possible for
Syncthing to reuse data blocks between files (even in different
folders), but requires maintaining an index of every individual block's
hash. This index can be costly for large folders, so indexing can be
disabled with the tradeoff of using more bandwidth for transfers.


Device Element
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