What is the difference between the chattr and setfattr command

At the Veeam Documentation, I read that the chattr and setfattr commands need to be supported: - https://helpcenter.veeam.com/docs/backup/vsphere/hardened_repository_limitations.html?ver=110 I have read the following man pages: - https://man7.org/linux/man-pages/man1/chattr.1.html - https://man7.org/linux/man-pages/man1/setfattr.1.html I figured out that chattr is used to set attributes, e.g. cattr +i makes a file immutable. But for what is the setfattr comand in context with Veeam used for? I searched for hours but did not figure it out.