Hi all! I know that ceph images (rbd) are sparse. It's good but I have some interrogations about the ceph -s (-w) output. Let's say your create a 10G image, map it, format it and mount it. Finally you filled up the entire space available. You notice that the 'data' and 'used' space had grown. Now delete the content of your image but **not** this image, not now. You notice that nothing changed from the ceph output, it's not surprising because of the sparse capability. At this point of time the output from the command ceph is neither right nor wrong. It only shows the space used by the sparse image, but it doesn't mean that you have 'real' data in it, just a simple object allocation. It's not so relevant, the only solution is to remove the image (obviously). My feeling is that we should be careful about the ceph's output, it's not a good indicator for 'real' data. Ok Ceph won't replace a monitoring system but I'll be happy to trust the ceph output at 100% :) I would appreciate some reactions about that :) Thank you in advance. Cheers! -- 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
