Hi, I've been working on getting a working blktap driver allowing to access ceph RBD block devices without relying on the RBD kernel driver and it finally got to a point where, it works and is testable. Some of the advantages are: - Easier to update to newer RBD version - Allows functionality only available in the userspace RBD library (write cache, layering, ...) - Less issue when you have OSD as domU on the same dom0 - Contains crash to user space :p (they shouldn't happen, but ...) It's still an early prototype, but if you want to give it a shot and give feedback. You can find the code there https://github.com/smunaut/blktap/tree/rbd (rbd branch). Currently the username, poolname and image name are hardcoded ... (look for FIXME in the code). I'll get to that next, once I figured the best format for arguments. Cheers, Sylvain -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html