Rsync Backup plan

Hey friends,

I'm working on a backup plan using Rsync.
OMV systems are backed up with Clonezilla so I'm just talking about data back up there

Here's the global setup :

Many sites
Site 1 = 1 OMV + data disks with raid 1.
Other sites access another OMV + data disk in the cloud.

I'm planning on making a Rsync between the 2 OMV modules (site1+cloud) everynight to sync the data so everyone access the same data @day+1

My concern is about the files that could be accessed during/between the process. I.e What's going on with let's say if 2 employees (one from local site 1, one from remote site using cloud) work on a file "test.txt" the same day. If it's sync everynights, then wich file would be really kept in the end? Is there a way to get both to avoid this particular case issue ? It should'nt happens a lot but I can't afford losing such files.

Any idea about the right rsync command to get the job done ?

btw, this is Rsync section, but I'd like the same from Rsnapshot eventually. Would it be good to use it there ?

Thanks a lot for your help

Help still appreciated, thanks.

Meh you know 6 hours is enough for a headache already, especially on friday. Thanks a lot

Zitat von ryecoaaron

There is no magic fix for this. Last save wins.

I'm definitely abusing your knowledge and kindness, but since Rsync compare both file size and modification time by default, is there a way by scritping or commands to make things like this between two files with same name :

check size only, if same size then overwrite
if not then check last modification date and copy oldest with suffixe _old

(using the --size-only and the -b --suffix _old options)

Okay. Well I'd love to hear from someone who ever uses that -b option to see how it goes with them. Else id take your advice as final statement and find another solution. Thanks for your help, you are awesome !

Have a nice week-end people.