@Override
    public void getConfig(ProtonConfig.Builder builder) {
        ProtonConfig.Distribution.Builder distBuilder = new ProtonConfig.Distribution.Builder();
        distBuilder.redundancy(finalRedundancy());
        distBuilder.searchablecopies(readyCopies());
        builder.distribution(distBuilder);
    }
Returns the final redundancy over all groups
config-model/src/main/java/com/yahoo/vespa/model/content/Redundancy.java