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-rw-r--r--doc/cephadm/services/rgw.rst26
1 files changed, 26 insertions, 0 deletions
diff --git a/doc/cephadm/services/rgw.rst b/doc/cephadm/services/rgw.rst
index ed0b149365a..3df8ed2fc56 100644
--- a/doc/cephadm/services/rgw.rst
+++ b/doc/cephadm/services/rgw.rst
@@ -173,6 +173,32 @@ Then apply this yaml document:
Note the value of ``rgw_frontend_ssl_certificate`` is a literal string as
indicated by a ``|`` character preserving newline characters.
+Disabling multisite sync traffic
+--------------------------------
+
+There is an RGW config option called ``rgw_run_sync_thread`` that tells the
+RGW daemon to not transmit multisite replication data. This is useful if you want
+that RGW daemon to be dedicated to I/O rather than multisite sync operations.
+The RGW spec file includes a setting ``disable_multisite_sync_traffic`` that when
+set to "True" will tell cephadm to set ``rgw_run_sync_thread`` to false for all
+RGW daemons deployed for that RGW service. For example
+
+.. code-block:: yaml
+
+ service_type: rgw
+ service_id: foo
+ placement:
+ label: rgw
+ spec:
+ rgw_realm: myrealm
+ rgw_zone: myzone
+ rgw_zonegroup: myzg
+ disable_multisite_sync_traffic: True
+
+.. note:: This will only stop the RGW daemon(s) from sending replication data.
+ The daemon can still receive replication data unless it has been removed
+ from the zonegroup and zone replication endpoints.
+
Service specification
---------------------