rclone/docs/content/commands/rclone_bisync.md
Nick Craig-Wood 7060777d1d docs: fix hugo warning: found no layout file for "html" for kind "term"
Hugo has been making this warning for a while

WARN found no layout file for "html" for kind "term": You should
create a template file which matches Hugo Layouts Lookup Rules for
this combination.

This turned out to be the addition of the `groups:` keyword to the
command frontmatter. Hugo is doing something with this keyword though
this isn't documented in the frontmatter documentation.

The fix was removing the `groups:` keyword from the frontmatter since
it was never used by hugo.
2024-06-15 12:59:49 +01:00

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---
title: "rclone bisync"
description: "Perform bidirectional synchronization between two paths."
status: Beta
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"
---
# 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 **in beta** and 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. Use at your own risk!
-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})
```
## 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 comma separated 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 Don't skip items that match size and time - transfer all unconditionally
--immutable Do not modify files, fail if existing files have been modified
--inplace Download directly to destination file instead of atomic download to temp/rename
--max-backlog int Maximum number of objects in sync or check backlog (default 10000)
--max-duration Duration Maximum duration rclone will transfer data for (default 0s)
--max-transfer SizeSuffix Maximum size of data to transfer (default off)
-M, --metadata If set, preserve metadata when copying objects
--modify-window Duration Max time diff to be considered the same (default 1ns)
--multi-thread-chunk-size SizeSuffix Chunk size for multi-thread downloads / uploads, if not set by filesystem (default 64Mi)
--multi-thread-cutoff SizeSuffix Use multi-thread downloads for files above this size (default 256Mi)
--multi-thread-streams int Number of streams to use for multi-thread downloads (default 4)
--multi-thread-write-buffer-size SizeSuffix In memory buffer size for writing when in multi-thread mode (default 128Ki)
--no-check-dest Don't check the destination, copy regardless
--no-traverse Don't traverse destination file system on copy
--no-update-dir-modtime Don't update directory modification times
--no-update-modtime Don't update destination modtime if files identical
--order-by string Instructions on how to order the transfers, e.g. 'size,descending'
--partial-suffix string Add partial-suffix to temporary file name when --inplace is not used (default ".partial")
--refresh-times Refresh the modtime of remote files
--server-side-across-configs Allow server-side operations (e.g. copy) to work across different configs
--size-only Skip based on size only, not modtime or checksum
--streaming-upload-cutoff SizeSuffix Cutoff for switching to chunked upload if file size is unknown, upload starts after reaching cutoff or when file ends (default 100Ki)
-u, --update Skip files that are newer on the destination
```
## Important Options
Important flags useful for most commands.
```
-n, --dry-run Do a trial run with no permanent changes
-i, --interactive Enable interactive mode
-v, --verbose count Print lots more stuff (repeat for more)
```
## Filter Options
Flags for filtering directory listings.
```
--delete-excluded Delete files on dest excluded from sync
--exclude stringArray Exclude files matching pattern
--exclude-from stringArray Read file exclude patterns from file (use - to read from stdin)
--exclude-if-present stringArray Exclude directories if filename is present
--files-from stringArray Read list of source-file names from file (use - to read from stdin)
--files-from-raw stringArray Read list of source-file names from file without any processing of lines (use - to read from stdin)
-f, --filter stringArray Add a file filtering rule
--filter-from stringArray Read file filtering patterns from a file (use - to read from stdin)
--ignore-case Ignore case in filters (case insensitive)
--include stringArray Include files matching pattern
--include-from stringArray Read file include patterns from file (use - to read from stdin)
--max-age Duration Only transfer files younger than this in s or suffix ms|s|m|h|d|w|M|y (default off)
--max-depth int If set limits the recursion depth to this (default -1)
--max-size SizeSuffix Only transfer files smaller than this in KiB or suffix B|K|M|G|T|P (default off)
--metadata-exclude stringArray Exclude metadatas matching pattern
--metadata-exclude-from stringArray Read metadata exclude patterns from file (use - to read from stdin)
--metadata-filter stringArray Add a metadata filtering rule
--metadata-filter-from stringArray Read metadata filtering patterns from a file (use - to read from stdin)
--metadata-include stringArray Include metadatas matching pattern
--metadata-include-from stringArray Read metadata include patterns from file (use - to read from stdin)
--min-age Duration Only transfer files older than this in s or suffix ms|s|m|h|d|w|M|y (default off)
--min-size SizeSuffix Only transfer files bigger than this in KiB or suffix B|K|M|G|T|P (default off)
```
See the [global flags page](/flags/) for global options not listed here.
# SEE ALSO
* [rclone](/commands/rclone/) - Show help for rclone commands, flags and backends.