On 11/28/19 11:02 PM, liuchang0812 wrote: I think that all zones should be required to provide a full mapping of pools for all placement targets and storage classes named in its zonegroup. While that doesn't necessarily make sense for sync modules that don't store object data locally, the placement target validation is part of metadata sync - whereas the sync module abstraction applies mainly to data sync. I would recommend adding those missing placement targets to the elasticsearch zone. You shouldn't need to actually create pools for them, because radosgw won't be writing anything there. I would like to find a way to enforce this requirement, but that's difficult because the configuration steps are spread out between multiple clusters. You first have to add the placement target to the global zonegroup configuration, and then modify each local zone configuration to add its pools.