Hybrid Backup Sync, policy Copy vs Mirror

[chrisos]

In Hybrid Backup Sync, for the Sync Job policy, the 3 actions are mirror, copy and move.

In Copy, you have the option to only transfer updated files. You can also set the conflict policy for files of rename/overwrite/skip.

However with copy, files deleted at the source will not delete them from the destination.

My question is, with the mirror policy, there is no tick option to only upload updated files. What does mirror do if a file hasn't been updated, this isn't clear. You don't want stuff re-uploaded if it hasn't changed.

From the website:

"Mirror means your data at local and cloud are identical after synchronization, and extra files/folders at the destination will be deleted.

Copy will transfer all of the files from the source to destination. Enable “Only transfer updated files” to skip unmodified files. This setting also provides the “Rename/Replace/Skip” conflict policy. Before synchronization, if there are local and cloud files with the same name, Cloud Backup Sync will follow your conflict policy to handle these files."

https://www.qnap.com/en-us/how-to/tutor ... ackup-sync

No clarity.

Thanks

[chrisos]

Sorry to bump, but no one have any ideas? Thanks

[jc.online]

Sorry to bump, but no one have any ideas? Thanks

Hi chrisos, did you get to a solution / answer on this?

I too would like to use Mirror, but when i changed one of my scheduled jobs to mirror (from Copy) recently, it suddently started trying to "Compare" all files to the backup destination location and "Downloads" traffic via BackBlaze shot through the roof; i'm unclear whether this is a one-off whilst this mode is enabled and getting started or whether every time the job runs it will be checking all files (source vs destination)?

Anyone else know?

[P3R]

@jc.online, that's great you answered the question from chrisos yourself.

Apparently HBS download the files to compare them. That to me sounds logical for a mode named "Mirror". There aren't many other ways to find out if the files are the same or different than to compare it to the file on the NAS.

As I don't know I'm guessing now but since logically there's no other way to know for sure if the files have changed, I would expect that they'll have to be compared every time

[Mattyx08]

Hi!

I'm using HBS v2.1 and I noticed that behavior too!
I directly set up a mirror "Sync" job to Backblaze B2 and after a while it failed due to cap hitting of Class B Transactions (file_info + file_download).

@jc.online when the job is set to "copy" does it not download the files?

I wonder if that issue is solved in HBS3... I read that now Backblaze B2 is supported natively as a "Backup" target... too bad my QNAP doesn't support HBS3...