** Also affects: nova/pike Importance: Undecided Status: New ** Changed in: nova Importance: Undecided => Medium
** Changed in: nova/pike Status: New => Confirmed ** Changed in: nova/pike Importance: Undecided => Medium ** Also affects: nova/queens Importance: Undecided Status: New ** Changed in: nova/queens Status: New => Confirmed ** Changed in: nova/queens Importance: Undecided => Medium -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1747650 Title: Make bdms querying in multiple cells use scatter-gather Status in OpenStack Compute (nova): Fix Released Status in OpenStack Compute (nova) pike series: Confirmed Status in OpenStack Compute (nova) queens series: In Progress Bug description: Currently the "_get_instance_bdms_in_multiple_cells" function in extended_volumes runs sequentially and this affects the performance in case of large deployments (running a lot of cells) : https://github.com/openstack/nova/blob/master/nova/api/openstack/compute/extended_volumes.py#L50 So it would be nice to use the scatter_gather_cells function to do this operation in parallel. Also apart from the performance scaling point of view, in case connection to a particular cell fails, it would be nice to have sentinels returned which is done by the scatter_gather_cells function. This helps when a cell is down. To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1747650/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp