Ceph » rgw

Hello, i created and use an root pool other than .rgw.root to store realm and zone configuration with the following option:
rgw_realm_root_pool=myzone.rgw.root
rgw_zonegroup_root_pool=myzone.rgw.root
rgw_zone_root_pool=myzone.rgw.root

But , i can see when i commit a new period with a debug option , radosgw need to read and write period in .rgw.root.
Is there an option or other to avoid read and write period on the root pool .rgw.root ? Is it mandatory ?
Log:
...
2023-04-05T14:28:43.802+0200 7f4c20961700 10 rgw watcher librados: RGWWatcher::handle_notify() notify_id 75372381086156 cookie 94378383464160 notifier 739020719 bl.length()=883
2023-04-05T14:28:43.802+0200 7f4c20961700 10 rgw watcher librados: cache put: name=myzonename.s3.rgw.root++zonegroup_info.8aa5a35b-9841-4616-a0f6-1d035a55a45a info.flags=0x7
2023-04-05T14:28:43.802+0200 7f4c20961700 10 rgw watcher librados: moving myzonename.s3.rgw.root++zonegroup_info.8aa5a35b-9841-4616-a0f6-1d035a55a45a to cache LRU end
2023-04-05T14:28:43.806+0200 7f4c24535840 10 cache put: name=myzonename.s3.rgw.root++zonegroups_names.myzonename.s3 info.flags=0x7
2023-04-05T14:28:43.806+0200 7f4c24535840 10 moving myzonename.s3.rgw.root++zonegroups_names.myzonename.s3 to cache LRU end
2023-04-05T14:28:43.806+0200 7f4c24535840 10 distributing notification oid=myzonename.secondary.rgw.control:notify.6 cni=[op: 0, obj: myzonename.s3.rgw.root:zonegroups_names.myzonename.s3, ofs0, ns]
2023-04-05T14:28:43.806+0200 7f4c20961700 10 rgw watcher librados: RGWWatcher::handle_notify() notify_id 75372381086157 cookie 94378383468288 notifier 739020719 bl.length()=226
2023-04-05T14:28:43.806+0200 7f4c20961700 10 rgw watcher librados: cache put: name=myzonename.s3.rgw.root++zonegroups_names.myzonename.s3 info.flags=0x7
2023-04-05T14:28:43.806+0200 7f4c20961700 10 rgw watcher librados: moving myzonename.s3.rgw.root++zonegroups_names.myzonename.s3 to cache LRU end
2023-04-05T14:28:43.818+0200 7f4c24535840 10 cache put: name=.rgw.root++period_config.cab6fdc5-10c6-49ca-8edc-532beb718b9a info.flags=0x7
2023-04-05T14:28:43.818+0200 7f4c24535840 10 moving .rgw.root++period_config.cab6fdc5-10c6-49ca-8edc-532beb718b9a to cache LRU end
2023-04-05T14:28:43.818+0200 7f4c24535840 10 distributing notification oid=myzonename.secondary.rgw.control:notify.6 cni=[op: 0, obj: .rgw.root:period_config.cab6fdc5-10c6-49ca-8edc-532beb718b9a, ofs0, ns]
2023-04-05T14:28:43.818+0200 7f4c21162700 10 rgw watcher librados: RGWWatcher::handle_notify() notify_id 75372381086158 cookie 94378383468288 notifier 739020719 bl.length()=253
2023-04-05T14:28:43.818+0200 7f4c21162700 10 rgw watcher librados: cache put: name=.rgw.root++period_config.cab6fdc5-10c6-49ca-8edc-532beb718b9a info.flags=0x7
2023-04-05T14:28:43.818+0200 7f4c21162700 10 rgw watcher librados: moving .rgw.root++period_config.cab6fdc5-10c6-49ca-8edc-532beb718b9a to cache LRU end

Pacific 16.2.9

regards
Guillaume