@Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        ConnectionSpec that = (ConnectionSpec) o;
        return ensembleSize == that.ensembleSize &&
               local.equals(that.local) &&
               ensemble.equals(that.ensemble);
    }
Returns the number of servers in the ensemble
zkfacade/src/main/java/com/yahoo/vespa/curator/ConnectionSpec.java