synology drive share sync did not work, what are my options see below

[kreta123]

i have a ds1819+ at site a and a ds1821+ at site b.

what i would like that both nas's have the same shared folders, with exactly the same file/folder structure and that when i make a change on the ds1819 or the ds1821 that they both sync up together.

what i have tried.....

as everyone recommended i setup drive server on both and used the drive share sync.

i tried a few scenarios.

first scenario

i put an external drive on the ds1819 (main nas with data) and i made folders on the external with the shared folder names and then i went in to the ds1819 file station and selected all items in the shared folder and did a "copy to" to the external drive for each shared folder name.

after checking the properties file on the shared folders and on all three sources (ds1819, external hard drive, and ds1821) everything was exact, from number of folders and files. to the size and contains x files and y folders. everything matched. after doing this, i setup a sync task on the ds1821 as a two way sync with no file versions on the team folder on both nas's and i did a sync. after doing so and it finishing, the number of files and folders on one of the nas did not match now. it was a little over.

second scenario

back to the drawing board, i renamed the shared folders i did a trial run on secnario one to foldername.old on both nas's

i brought the ds1821 to site a, so the sync would be done faster on lan....re-created the shared folder on both. transferred the data from the external now only to the ds1819, just in case anything was altered from scenario one. (fresh start). after doing this i left the newly created shared folder on ds1821 empty. i setup another task on drive share sync, so it will download all the folders and files from the ds1819 folder to the empty ds1821 folder.. that finished and now the files and folders numbers do not match.

so for the time being, i renamed scenario 2's folders to .old.old.... and created new shared folder on both ds1819 and ds1821 and copied the folders from the external drive back to both. so as of now across the board (ds1819, external, and ds1821) all the numbers match up.

What i would like is to have a 2 way sync and with the possibility of adding versioning down the line with these two nas's. If the only option is drive share sync, based off of what i did...i am not going that route again.

also, both nas's storage pools are shr2 under btrfs and both nas's have exact same number of drives as well as size

If we have to talk about one way sync, that may be feasible at this point. I saw some articles about rsync in the file services. What about hyper backup, is there a way i can do a backup from ds1819 to ds1821 and then have run incremental, but i would need full access to the files and folders. i know i do hyper backup to an extenral hd usb and make it a single version and it runs incrementally. could i do this with the two nas's? any help is greatly appreciated.

 

[Rusty]

apart from Drive and sync option that you have already mentioned your are left with one way shared folder sync option Shared Folder Sync | DSM - Synology Knowledge Center

HB is a backup tool not sync. So if you want syncing, that’s it from official supported packages.

HB can do a simple single file rsync (it’s under File server section of the HB wizard) and that will not use HB proprietary db format but again it’s a backup process not sync and it does not support versioning.

Finally there is Snapshot Replication tool for local snaps and remote replication but with that tool all content vending replicated is read only on the destination side until the replication is terminated and the shared folder is promoted to R/W.

 

[kreta123]

got it, so let's say i do the hb single file rsync. would that allow me to access the files and folders at both servers?

 

[Rusty]

C

got it, so let's say i do the hb single file rsync. would that allow me to access the files and folders at both servers?

Correct. The backup will copy data over in its original file/folder structure inside a subfolder matching that particular backup job. But all in all, data will be readable just as you had copied it on a USB drive for example

 

[kreta123]

C

Correct. The backup will copy data over in its original file/folder structure inside a subfolder matching that particular backup job. But all in all, data will be readable just as you had copied it on a USB drive for example

okay now here is the million dollar question if i take the data on server a copy it to my external and then paste it on server b.. with same shared folder name. then i set up a hyper backup job to go from site b to site a would it just scan all the files and complete with both properties matching exactly the way they were before the task? also, if this is the case can i setup a task to back up from site a to be and then from site b to a?

what is your stance on this whole situation?

 

[Rusty]

You can do a local backup task (of that sort) to a usb drive, and after completion transfer the USB to site B.

Copy the content to a shared folder of your choice, must leave the folder structure intact! It is import in order to reconnect the initial job to this existing content.

Once the data is on site B, edit job on site A or simple delete it and start a fresh one by using the HB “relink to existing job” option.

This will rescan the location you will point the HB to on site B, check against location A and on the next backup do an incremental backup.