On 09/06/2012 02:57 PM, Nick Bartos wrote:
Is it safe to use the discard mount option when mounting a xfs filesystem on an rbd (using the kernel driver)? We're currently using kernel 3.5.3 and Ceph 0.48.1.
The kernel rbd driver doesn't support discard yet (http://tracker.newdream.net/issues/190).
Also, are there any stability issues doing it from a qemu VM? It looks like support for rbd discard was added in qemu 1.1, but I wasn't sure how stable it was.
There was one bug (http://tracker.newdream.net/issues/2958) whose fix will be in the next release. Note that you need an extra qemu option (http://tracker.newdream.net/issues/2777) for the guest to detect discard support. Josh -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
