/rclone_bisync

title: "rclone bisync"
description: "Perform bidirectional synchronization between two paths."
versionIntroduced: v1.58
# autogenerated - DO NOT EDIT, instead edit the source code in cmd/bisync/ and as part of making a release run "make commanddocs"

> **Official documentation:** [https://rclone.org/commands/rclone_bisync/](https://rclone.org/commands/rclone_bisync/)

rclone bisync

Perform bidirectional synchronization between two paths.

Synopsis

Perform bidirectional synchronization between two paths.

[Bisync](https://rclone.org/bisync/) provides a bidirectional cloud sync solution in rclone. It retains the Path1 and Path2 filesystem listings from the prior run. On each successive run it will:

• list files on Path1 and Path2, and check for changes on each side.

Changes include `New`, `Newer`, `Older`, and `Deleted` files.

• Propagate changes on Path1 to Path2, and vice-versa.

Bisync is considered an **advanced command**, so use with care. Make sure you have read and understood the entire [manual](https://rclone.org/bisync) (especially the [Limitations](https://rclone.org/bisync/#limitations) section) before using, or data loss can result. Questions can be asked in the [Rclone Forum](https://forum.rclone.org/).

See [full bisync description](https://rclone.org/bisync/) for details.

rclone bisync remote1:path1 remote2:path2 [flags]

Options

      --backup-dir1 string                   --backup-dir for Path1. Must be a non-overlapping path on the same remote.
      --backup-dir2 string                   --backup-dir for Path2. Must be a non-overlapping path on the same remote.
      --check-access                         Ensure expected RCLONE_TEST files are found on both Path1 and Path2 filesystems, else abort.
      --check-filename string                Filename for --check-access (default: RCLONE_TEST)
      --check-sync string                    Controls comparison of final listings: true|false|only (default: true) (default "true")
      --compare string                       Comma-separated list of bisync-specific compare options ex. 'size,modtime,checksum' (default: 'size,modtime')
      --conflict-loser ConflictLoserAction   Action to take on the loser of a sync conflict (when there is a winner) or on both files (when there is no winner): , num, pathname, delete (default: num)
      --conflict-resolve string              Automatically resolve conflicts by preferring the version that is: none, path1, path2, newer, older, larger, smaller (default: none) (default "none")
      --conflict-suffix string               Suffix to use when renaming a --conflict-loser. Can be either one string or two comma-separated strings to assign different suffixes to Path1/Path2. (default: 'conflict')
      --create-empty-src-dirs                Sync creation and deletion of empty directories. (Not compatible with --remove-empty-dirs)
      --download-hash                        Compute hash by downloading when otherwise unavailable. (warning: may be slow and use lots of data!)
      --filters-file string                  Read filtering patterns from a file
      --force                                Bypass --max-delete safety check and run the sync. Consider using with --verbose
  -h, --help                                 help for bisync
      --ignore-listing-checksum              Do not use checksums for listings (add --ignore-checksum to additionally skip post-copy checksum checks)
      --max-lock Duration                    Consider lock files older than this to be expired (default: 0 (never expire)) (minimum: 2m) (default 0s)
      --no-cleanup                           Retain working files (useful for troubleshooting and testing).
      --no-slow-hash                         Ignore listing checksums only on backends where they are slow
      --recover                              Automatically recover from interruptions without requiring --resync.
      --remove-empty-dirs                    Remove ALL empty directories at the final cleanup step.
      --resilient                            Allow future runs to retry after certain less-serious errors, instead of requiring --resync.
  -1, --resync                               Performs the resync run. Equivalent to --resync-mode path1. Consider using --verbose or --dry-run first.
      --resync-mode string                   During resync, prefer the version that is: path1, path2, newer, older, larger, smaller (default: path1 if --resync, otherwise none for no resync.) (default "none")
      --slow-hash-sync-only                  Ignore slow checksums for listings and deltas, but still consider them during sync calls.
      --workdir string                       Use custom working dir - useful for testing. (default: {WORKDIR})

Options shared with other commands are described next. See the [global flags page](/flags/) for global options not listed here.

Copy Options

Flags for anything which can copy a file

      --check-first                                 Do all the checks before starting transfers
  -c, --checksum                                    Check for changes with size & checksum (if available, or fallback to size only)
      --compare-dest stringArray                    Include additional server-side paths during comparison
      --copy-dest stringArray                       Implies --compare-dest but also copies files from paths into destination
      --cutoff-mode HARD|SOFT|CAUTIOUS              Mode to stop transfers when reaching the max transfer limit HARD|SOFT|CAUTIOUS (default HARD)
      --ignore-case-sync                            Ignore case when synchronizing
      --ignore-checksum                             Skip post copy check of checksums
      --ignore-existing                             Skip all files that exist on destination
      --ignore-size                                 Ignore size when skipping use modtime or checksum
  -I, --ignore-times