Hi, We have the same setup including OpenNebula 4.10.1. We had some backfilling due to node failures and node expansion. If we throttle osd_max_backfills there is not a problem at all. If the value for backfilling jobs is too high, we can see delayed reactions within the shell, eg. `ls -lh` needs 2 seconds. Kind regards, Achim -- Achim Ledermüller, M. Sc. Systems Engineer NETWAYS Managed Services GmbH | Deutschherrnstr. 15-19 | D-90429 Nuernberg Tel: +49 911 92885-0 | Fax: +49 911 92885-77 GF: Julian Hein, Bernd Erk | AG Nuernberg HRB25207 http://www.netways.de | Achim.Ledermueller@xxxxxxxxxx ** OSDC 2015 - April - osdc.de ** ** Puppet Camp Berlin 2015 - April - netways.de/puppetcamp ** ** OSBConf 2015 - September – osbconf.org ** _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com