Added more params

docs/system-databases-data.md

@@ -28,11 +28,17 @@ curl \
 
 ### Backup
 
+Export all databases with `--skip-lock-tables` option for MariaDB Galera clusters as it is not supported currently by
+MariaDB Galera.
+
 ```console
 mysqldump \
     -u <privilegedUsername> \
     -p<privilegedPassword> \
-    <databaseInternalName> > dump.sql
+    --complete-insert \
+    --skip-lock-tables \
+    --skip-add-locks \
+    --all-databases > dump.sql
 ```
 
 ### Restore
@@ -40,8 +46,7 @@ mysqldump \
 ```console
 mysql \
     -u <privilegedUsername> \
-    -p<privilegedPassword> \
-    <databaseInternalName> < dump.sql
+    -p<privilegedPassword> < dump.sql
 ```
 
 ## Limitations