Ceph » CephFS

I would be grateful if you could explain a couple of items as these are not immediately clear to me from the Ceph documentation:

1) My Ceph cluster is running on RHEL 6.4 (kernel 2.6.32). As such I cannot use the RDB kernel module and so map block device images to the kernel module. I tried and this failed:

1. rbd map fedbk --pool fed --name client.fed -m 10.40.99.165 -k /etc/ceph/lient.fed.keyring
   FATAL: Module rbd not found.
   rbd: modprobe rbd failed! (256)

Does this then mean that I cannot access these block devices from another server using libvirt/KVM ? i.e. it is not possible to use Ceph with libvirt/KVM etc unless I have a kernel level of 2.6.34 or later which supports the kernel module ?

2) Is the kernel RBD module ever used on a remote client ? For example the kernel CephFS module enable a client to remotely access and mount a CephFS filesystem. However it is not clear to me if there is a similar role for the RBD kernel module ? Can this be used to remotely access a remote block device - or is it only ever used on the Ceph cluster itself ?

thanks for your help.

Chris