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我正在使用Apache Pig对Hadoop集群执行一些数据分析工作。我在hadoop集群中部署了一个集合节点和32个从属节点。但是,当我使用Pig在mapreduce模式下运行脚本时,连接到该Hadoop群集时,它始终只启动一个映射并减少一个映射。我如何设置Pig或Hadoop来使用所有32个从站?下面将Apache Pig连接到Hadoop集群
工作状态显示:
Job Stats (time in seconds):
JobId Maps Reduces MaxMapTime MinMapTime AvgMapTime MedianMapTime MaxReduceTime MinReduceTime AvgReduceTime MedianReducetime Alias Feature Outputs
job_1457865367374_0001 1 1 88 88 88 88 27 27 27 27 1-1,access_grouped,access_summed,cleaned,named,raw,timed,timed_grouped,timed_summedMULTI_QUERY
job_1457865367374_0002 1 1 5 5 5 5 5 5 5 5 access_ordered SAMPLER
job_1457865367374_0003 2 1 10 10 10 10 6 6 6 6 density,density_scored HASH_JOIN
job_1457865367374_0004 1 1 5 5 5 5 5 5 5 5 timed_ordered SAMPLER
job_1457865367374_0005 1 1 5 5 5 5 5 5 5 5 timed_ordered ORDER_BY hdfs://master:54310/user/ubuntu/Data/timed_ordered,
job_1457865367374_0006 1 1 5 5 5 5 5 5 5 5 access_ordered ORDER_BY hdfs://master:54310/user/ubuntu/Data/access_ordered,
job_1457865367374_0007 1 1 5 5 5 5 5 5 5 5 density_ordered SAMPLER
job_1457865367374_0008 1 1 5 5 5 5 5 5 5 5 density_ordered ORDER_BY hdfs://master:54310/user/ubuntu/Data/density_ordered,
b.t.w,我主计算机上安装了Apache猪。