Upon network partition healing, do replicated volumes automatically
synchronize all their objects, or are objects synchronized upon next
reference? So if f is replicated and I modify f in one volume because
its replica is partitioned, will f be automatically updated to the
other partition when the network heals or will it be updated upon next
use of f (assuming the network is not partitioned at that time).

You may point me to appropriate documentation.

Thanks
--sandeep