I saw the following warning trying to deduplicate a large BTRFS filesystem:
Deduplicating filesystem <tank2_2016-07>
/root/.local/lib/python3.4/site-packages/SQLAlchemy-1.1.5-py3.4-linux-x86_64.egg/sqlalchemy/sql/elements.py:4230: SAWarning: Textual SQL expression '"Inode".vol_id IN (1, 2, ...' should be explicitly declared as text('"Inode".vol_id IN (1, 2, ...') (this warning may be suppressed after 10 occurrences)
{"expr": util.ellipses_string(element)})
I saw the following warning trying to deduplicate a large BTRFS filesystem: