Docker plugin concurrency limiting

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What is the problem you are having with rclone?

I am using Hetzner's SFTP storage box BX11 and it has 10 concurrent connection limit and transfers and checkers defaults are 4 and 8, so I assume that 12 is hitting connection cap.
I get a connection cap error if trying to connect from other devices.
I tried to add transfers and checkers options limiting them to 1 but I got unsupported backend option

Run the command 'rclone version' and share the full output of the command.

rclone v1.65.0

  • os/version: ubuntu 22.04 (64 bit)
  • os/kernel: 5.15.0-1049-oracle (aarch64)
  • os/type: linux
  • os/arch: arm64 (ARMv8 compatible)
  • go/version: go1.21.4
  • go/linking: static
  • go/tags: snap

Which cloud storage system are you using? (eg Google Drive)


The command you were trying to run (eg rclone copy /tmp remote:tmp)

docker compose file

    driver: rclone
      # source: your_sftp_alias:your_sftp_path
      # destination: /local/path
      type: sftp
      sftp-user: ${SFTP_USER}
      sftp-pass: ${SFTP_PASSWORD_OBSCURED}
      sftp-host: ${SFTP_HOST}
      # checkers: 1
      # transfers: 1
      allow-other: 1

Please run 'rclone config redacted' and share the full output. If you get command not found, please make sure to update rclone.

NOTICE: Config file "/home/ubuntu/snap/rclone/487/.config/rclone/rclone.conf" not found - using defaults
; empty config
### Double check the config for sensitive info before posting publicly

A log from the command that you were trying to run with the -vv flag

 ✘ Volume "rclone-volume"  Error                                                                                                                         0.0s 
Error response from daemon: create rclone-volume: VolumeDriver.Create: unsupported backend option "checkers"

welcome to the forum,

checkers is a global flag, not a backend flag.

so i believe you need to use args, something like
args="checkers=1 transfers=1"

You can also use this (which can go in the config file)

  --sftp-concurrency int   The maximum number of outstanding requests for one file (default 64)

Its really easy to deadlock rclone with this though so setting --checkers and --transfers is best, but I'm not sure how well they work with the docker plugin.

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