static boolean useShadowEngine(boolean primary, Settings indexSettings) {
return primary == false && IndexMetaData.isIndexUsingShadowReplicas(indexSettings);
}
/**
* Indicated whether this operation should be replicated to shadow replicas or not. If this method
* returns true the replication phase will be skipped. For example writes such as index and delete
* don't need to be replicated on shadow replicas but refresh and flush do.
*/
protected boolean shouldExecuteReplication(Settings settings) {
return IndexMetaData.isIndexUsingShadowReplicas(settings) == false;
}