Maximum file system size of XFS?

[Pascal]

Hello,

I am asking you because I am insecure about the correct answer and
different sources give me different numbers.


My question is: What is the maximum file system size of XFS?

The official page says: 2^63 = 9 x 10^18 = 9 exabytes
Source: http://oss.sgi.com/projects/xfs/

Wikipedia says 16 exabytes.
Source: https://en.wikipedia.org/wiki/XFS

Another reference books says 8 exabytes (2^63).


Can anyone tell me and explain what is the maximum file system size for
XFS?


Thank you in advance!

Pascal