2-way rsync?

My way of thinking was one automated backup job and one manually triggered one if source device fails, in other words basic backup/restore process done with Rsync. The tip was just that Rsync can be used to a folder and then you can mount an SMB share that would appear like a folder to Rsync and so you can do everything having only SMB access to one device and full SSH access to the other so that the inability of the older device to have rsync is no problem neither for backup nor for restore.

That said I didn't pay attention that post #1 and #3 weren't sent by the same person.
So what I said was for @WarrenT.

For true bidirectional sync, DRBD is the first thing to pop in mind but I fear that with NAS custom kernels that's a bit complicated (if possible) to do.
Second one is Bittorent sync, if you have a secure channel between devices of course but I don't think the duo has it in the apps, shouldn't be hard to install it via SSH though. Also I recently found my conf erased while upgrading, I don't think that's the app but that it has more to do with Netgear Package (when my mac updated the app settings remained). Data is still present though, so that's more a trouble of generating keys and getting them back than anything else.
and a third one could be Unison but I didn't use it myself.

xeltros wrote:
...what I said was for @WarrenT...

And I agree that two 1-way backup jobs would solve his issue - I gave him similar advice further up the thread.

xeltros wrote:

For true bidirectional sync, DRBD is the first thing to pop in mind but I fear that with NAS custom kernels that's a bit complicated (if possible) to do. Second one is Bittorent sync, if you have a secure channel between devices of course but I don't think the duo has it in the apps, shouldn't be hard to install it via SSH though. Also I recently found my conf erased while upgrading, I don't think that's the app but that it has more to do with Netgear Package (when my mac updated the app settings remained). Data is still present though, so that's more a trouble of generating keys and getting them back than anything else. and a third one could be Unison but I didn't use it myself.

Another possibility is to do a sync directly between your client devices, and just use the NAS for backing up the synced folder.

This application has been on my "to-do" list for a while, but hasn't reached the top yet. I suspect other posters are ahead of me - it would be nice to hear what you all are using .

You mean using a tool (usually provided with hard drives) to sync two client devices (keeping a full copy on each) and backing up on of them to the NAS ? Seems like you have a single point of failure there with the device that plays the middle man.

Which application in on your to do ? DRBD ? It's on mine too but vmware ESX solves a lot of clustering problems so I hadn't any good reason to try ;)

I have two laptops (used for different employers), but would like to have some data sync'd between them. Both are backed up using image backup. Security is a concern for the unsynced data, so I'd need to assess whether non-synced data could leak.