Public bug reported: The scheduler host.manager connects to all cells DBs to get compute node info even if only a subset of compute nodes uuids are given by placement.
This has a performance impact in large cloud deployments with several cells. Also related with: https://review.openstack.org/#/c/539617/9/nova/scheduler/host_manager.py {code} def _get_computes_for_cells(self, context, cells, compute_uuids=None) for cell in cells: LOG.debug('Getting compute nodes and services for cell %(cell)s', {'cell': cell.identity}) with context_module.target_cell(context, cell) as cctxt: if compute_uuids is None: compute_nodes[cell.uuid].extend( objects.ComputeNodeList.get_all(cctxt)) else: compute_nodes[cell.uuid].extend( objects.ComputeNodeList.get_all_by_uuids( cctxt, compute_uuids)) services.update( {service.host: service for service in objects.ServiceList.get_by_binary( cctxt, 'nova-compute', include_disabled=True)}) return compute_nodes, services {code} ** Affects: nova Importance: Undecided Status: New -- 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/1767303 Title: Scheduler connects to all cells DBs to gather compute nodes info Status in OpenStack Compute (nova): New Bug description: The scheduler host.manager connects to all cells DBs to get compute node info even if only a subset of compute nodes uuids are given by placement. This has a performance impact in large cloud deployments with several cells. Also related with: https://review.openstack.org/#/c/539617/9/nova/scheduler/host_manager.py {code} def _get_computes_for_cells(self, context, cells, compute_uuids=None) for cell in cells: LOG.debug('Getting compute nodes and services for cell %(cell)s', {'cell': cell.identity}) with context_module.target_cell(context, cell) as cctxt: if compute_uuids is None: compute_nodes[cell.uuid].extend( objects.ComputeNodeList.get_all(cctxt)) else: compute_nodes[cell.uuid].extend( objects.ComputeNodeList.get_all_by_uuids( cctxt, compute_uuids)) services.update( {service.host: service for service in objects.ServiceList.get_by_binary( cctxt, 'nova-compute', include_disabled=True)}) return compute_nodes, services {code} To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1767303/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
