hive两大表关联优化试验
呼叫结果(call_result)与销售历史(sale_history)的join优化: CALL_RESULT: 32亿条/444G SALE_HISTORY:17亿条/439G原逻辑 Map: 3255 Reduce: 950 Cumulative CPU: 238867.84 sec HDFS Read: 587550313339 HDFS Write: 725372