So, AFAICT, the bulk of the write would be writing out the pgmap to disk every second or so. Is it really needed to write it in full ? It doesn't change all that much AFAICT, so writing incremental changes with only periodic flush might be a better option ? 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