On Wed, 14 Jan 2015 02:20:21 PM Rafał Michalak wrote:
> Why data not replicating on mounting fs ?
> I try with filesystems ext4 and xfs
> The data is visible only when unmounted and mounted again


Because you are not using a cluster aware filesystem - the respective mounts 
don't know when changes are made to the underlying block device (rbd) by the 
other mount. What you are doing *will* lead to file corruption.

Your need to use a distributed filesystem such as GFS2 or cephfs.

CephFS would be probably be the easiest to setup.
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