Switching from Synology Cloud Sync to rclone

Help and Support
1

I have been using Synology Cloud Sync for a while to sync data from my NAS to S3.

Is it possible to switch from Cloud Sync to rclone and have it not reupload data? One problem I can see is that the two products use different metadata tags to track source timestamps.

Thank you in advance for any ideas/experiences…..

2

it should be possible.
need to run a simple test on just one single flie using -vv --dry-run

might try https://rclone.org/s3/#avoiding-head-requests-to-read-the-modification-time

3

Yeah I tried --dry-run and it looks like it wants to reupload all the data again.

Thanks for the link to that documentation. It looks promising. Will try it out and report back…

4

Tried the --checksum option but it shows:

--checksum is in use but the source and destination have no hashes in common

(Source is SMB, target is S3. Not sure of the problem.)

The --size-only option appears to work ok, but maybe not the ideal option.

Surprising (to me) is that Synology Cloud Sync and rclone both use the S3 metdata tag of x-amz-meta-mtime. Guess there are differences in precision or something.

5

i am also surprised.
i have a couple of synboxes, but never used their cloud sync.

for a deeper look, can use

  • rclone lsf --format= on the source and on the dest file
  • --dump=headers