Map-Reduce Logs on Hive-Tez

Question

我想在Hive-Tez上运行查询后得到Map-Reduce日志的解释?INFO:后面的行表达了什么?这里我附上了一个样品

INFO  : Session is already open
INFO  : Dag name: SELECT a.Model...)
INFO  : Tez session was closed. Reopening...
INFO  : Session re-established.
INFO  : 
INFO  : Status: Running (Executing on YARN cluster with App id application_14708112341234_1234)
INFO  : Map 1: -/-  Map 3: -/-  Map 4: -/-  Map 7: -/-  Reducer 2: 0/15     Reducer 5: 0/26 Reducer 6: 0/13 
INFO  : Map 1: -/-  Map 3: 0/118    Map 4: 0/118    Map 7: 0/1  Reducer 2: 0/15 Reducer 5: 0/26  Reducer 6: 0/13
INFO  : Map 1: 0/118    Map 3: 0/118    Map 4: 0/118    Map 7: 0/1  Reducer 2: 0/15 Reducer 5: 0/26 Reducer 6: 0/13 
INFO  : Map 1: 0/118    Map 3: 0/118    Map 4: 0(+5)/118    Map 7: 0/1  Reducer 2: 0/15 Reducer 5: 0/26 Reducer 6: 0/13 
INFO  : Map 1: 0/118    Map 3: 0(+5)/118    Map 4: 0(+7)/118    Map 7: 0(+1)/1  Reducer 2: 0/15 Reducer 5: 0/26 Reducer 6: 0/13 
INFO  : Map 1: 0/118    Map 3: 0(+15)/118   Map 4: 0(+18)/118   Map 7: 0(+1)/1  Reducer 2: 0/15 Reducer 5: 0/26 Reducer 6: 0/13 

Answer 1

您发布的日志是DAG执行日志。DAG包括Map 1、Map 3、Map 4、Map 7映射器顶点和减速机:减速机2、减速机5、减速机6

Map 1: -/- -这意味着顶点尚未初始化，映射器的数量尚未计算。

Map 4: 0(+7)/118 -这意味着总共有118个映射器，其中7个正在并行运行，0个已完成，118-7=111个正在等待。

Reducer 2: 0/15 -这意味着总共有15个减速机，其中0个正在运行，0个已完成(15个待挂)。

负数(在你的例子中没有)=失败或被杀死的映射器或reducer的数量

Qubole有关于Tez测井的解释:https://docs.qubole.com/en/latest/user-guide/hive/using-hive-on-tez/hive-tez-tuning.html#understanding-log-pane