Incremental backups

Does rclone support incremental backups? I don't think --ignore-exist is a true incremental backup. If a file already exists but is modified, the modified part should be backed up, not ignored or fully backed up by --ignore-exist.

If I was using rclone to backup, I would not use ignore existing.

You can use:

https://rclone.org/docs/#backup-dir-dir

and rclone in general does not copy the same files again. If a file was to change, it would update it.

hi,
this would give you something like a forever forward incremental backups.

rclone sync /home/user01/source remote:full --backup-dir=remote:incrementals/`date +%Y%m%d.%I%M%S`

and the folder strcuture would look like

rclone lsd -R remote:
           0 2021-06-16 09:12:23        -1 full
           0 2021-06-16 09:12:23        -1 incrementals
           0 2021-06-16 09:12:23        -1 incrementals/20210616.085616
           0 2021-06-16 09:12:23        -1 incrementals/20210616.090553

and the list of files would be

rclone lsl remote:
        2 2021-06-16 09:05:30.640000000 full/file.txt
        2 2021-06-16 08:54:55.760000000 incrementals/20210616.085616/file.txt
        2 2021-06-16 08:56:12.890000000 incrementals/20210616.090553/file.txt

i want to rclone only upload change part in file not full file when file is changed,not move old file to back-up dir.

i want to rclone only upload change part in file not full file when file is changed,not move old file to back-up dir

Rclone doesn't work at the block level on a file so it has to upload the whole file again.