@Override
  public AggregatedAccountStorageStats queryAggregatedAccountStorageStats() throws Exception {
    return queryAggregatedAccountStorageStatsByClusterName(clusterName);
  }
Store the {@link AggregatedAccountStorageStats} to mysql database.
@param aggregatedAccountStorageStats The {@link AggregatedAccountStorageStats}.
ambry-mysql/src/main/java/com/github/ambry/accountstats/AccountStatsMySqlStore.java