code: private KsDef setKeySpaceOptions(String keyspace) {
          KsDef ksDef = new KsDef();
          ksDef.setName(keyspace);
          Map<String, Object> ksDefs = m_service.getParamMap("ks_defaults");
          if (ksDefs != null) {
              for (String name : ksDefs.keySet()) {
                  Object value = ksDefs.get(name);
                  try {
                      KsDef._Fields field = KsDef._Fields.findByName(name);
                      if (field == null) {
                          m_logger.warn("Unknown KeySpace option: {} -- ignoring", name);
                      } else {
                          ksDef.setFieldValue(field, value);
                      }
                  } catch (Exception e) {
                      m_logger.warn("Error setting Keyspace option '" + name + "' to '" + value + "' -- ignoring", e);
                  }
              }
          }
  
          // Legacy support: ReplicationFactor -> replication_factor
          if (m_service.getParam("ReplicationFactor") != null) {
              Map<String, String> stratOpts = new HashMap<>();
              stratOpts.put("replication_factor", m_service.getParamString("ReplicationFactor"));
              ksDef.setStrategy_options(stratOpts);
          }
          
          // required: strategy_class, strategy_options, replication_factor, cf_defs, durable_writes
          if (!ksDef.isSetStrategy_class()) {
              ksDef.setStrategy_class(DEFAULT_KS_STRATEGY_CLASS);
          }
          if (!ksDef.isSetStrategy_options()) {
              Map<String, String> stratOpts = new HashMap<>();
              stratOpts.put("replication_factor", DEFAULT_KS_REPLICATION_FACTOR);
              ksDef.setStrategy_options(stratOpts);
          }
          if (!ksDef.isSetCf_defs()) {
              ksDef.setCf_defs(DEFAULT_KS_CF_DEFS);
          }
          if (!ksDef.isSetDurable_writes()) {
              ksDef.setDurable_writes(DEFAULT_KS_DURABLE_WRITES);
          }
          return ksDef;
      }
docs: Build KsDef from doradus.yaml and DBService-specific options.