@Override
    public int getServerIdBasedOnComponent(int componentId) {
        Integer serverComponentId = componentId2ServerId.get(componentId);
        return serverComponentId == null ? componentId : serverComponentId;
    }
Key is the component ID.
Value is the priority.
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/config/ComponentLibraryCatalogService.java