Hi,

Thanks, and sorry maybe I did not explain clearly what I  mean or. When
I' mounting a rbd image on two KVM machines, then if I am writing a file
in one system the other system does not recognize the change of the file
system. I thought there is some magic in librbd which give the OS the

There is no magic. If you have formatted that rbd with a file system like ext4 or similar, it will never work.

I saw in the documentation the "--shared tag" :

This can be used if you format the rbd with a clustered file system that is meant to be mounted on more than computer at the same time (like for example the OCFS2 file system).

--
Jens Kristian Søgaard, Mermaid Consulting ApS,
j...@mermaidconsulting.dk,
http://www.mermaidconsulting.com/
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