I would implement a backup system in this enterprise. I already have experimented with backupPC. This works fine but i had some questions.
We have a lot of live data with means the file can change frequently. This files are big files (>2TB). Rsync make a md5 hash and see that the files is change. but now he need to transfer the whole file i guess. Is there something that he only transfer the change part of the files. I found something but it could lead to inconsistent back-up. Because it calculate the MD5 of each part of the file. This is a good idea but what if the file change just on the moment that rsync calculate the md5hash or copy paste some thing from one part of the file to another part.
Is there a solution that i could just take a snapshot of something from the file on that moment and calculate the md5 of the snapshot?