As of v1.71, bisync is officially out of beta.
Some history:
- bisync was born in 2018 as https://github.com/cjnaz/rclonesync-V2
by @cjnaz, written in python.
- In 2021, @ivandeex ported it to go with @cjnaz's support.
https://github.com/rclone/rclone/pull/5164
- It was introduced as an "experimental" feature in v1.58.
6210e22ab5
- In 2023, bisync needed a new maintainer, and @nielash volunteered.
https://forum.rclone.org/t/bisync-bugs-and-feature-requests/37636
- Later in 2023, bisync received a major overhaul and was relabeled "beta"
(from "experimental"). https://github.com/rclone/rclone/pull/7410
- In 2024, integration tests were introduced for bisync (which previously had
only unit tests). https://github.com/rclone/rclone/pull/7693
- As of August 2025, bisync is stable and integration tests are passing on all
of the "flagship" backends.
Development doesn't stop here, of course. But bisync has come a long way since
its "experimental" days, and the "beta" tag is no longer needed.
Before this change, bisync supported `--backup-dir` only when `Path1` and
`Path2` were different paths on the same remote. With this change, bisync
introduces new `--backup-dir1` and `--backup-dir2` flags to support separate
backup-dirs for `Path1` and `Path2`.
`--backup-dir1` and `--backup-dir2` can use different remotes from each other,
but `--backup-dir1` must use the same remote as `Path1`, and `--backup-dir2`
must use the same remote as `Path2`. Each backup directory must not overlap its
respective bisync Path without being excluded by a filter rule.
The standard `--backup-dir` will also work, if both paths use the same remote
(but note that deleted files from both paths would be mixed together in the
same dir). If either `--backup-dir1` and `--backup-dir2` are set, they will
override `--backup-dir`.
