Hi Daisy, "Ying Chun Guo" <guoyingc at cn.ibm.com> > "Network Duration": What does "duration" mean? Is it equal to "usage time"? I believe this string is only seen in the Resources Usage statistics table, which is very confusing and actually doesn't make much sense [0]. There is currently a patch up [1] to remove the table entirely (including this string) which will likely be submitted also as a backport, to try and reduce the confusion. In the meantime, reading the bug report it sounds like perhaps the intention was to record average uptime - but even so, now the value doesn't make any sense. Hope this helps, Julie [0] https://bugs.launchpad.net/horizon/+bug/1249279 [1] https://review.openstack.org/#/c/57676/