getConf与new Configuration怎么配置

本篇内容主要讲解"getConf与new Configuration怎么配置"，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"getConf与new Configuration怎么配置"吧!

#getConf
所有的配置都通过命令的形式,此种情况下支持-files

sudo -uwirelessdev hadoop jar  \/home/q/script/mods/mrjob/mods-1.0-SNAPSHOT-jar-with-dependencies.jar  \-files /home/q/script/mods/mrjob/mods.acid   \-D mapreduce.job.queuename=wirelessdev   \-D mapreduce.job.priority=VERY_HIGH   \-D mapreduce.map.memory.mb=8192   \-D mapreduce.map.java.opts='-Xmx8192M'   \-D mapreduce.reduce.memory.mb=8192  \-D mapreduce.reduce.java.opts='-Xmx8192M'   \-D mapreduce.job.reduces=100    \-D mapred.reduce.tasks=100   \-D mapreduce.job.name=mods_firstjob_leofei.li   \/user/wirelessdev/marmot_warehouse/ods/ods_modss_frame/dt=2016-07-13/platform=Ios-pad/*  \/user/wirelessdev/leofei.li/firstjob

#new Configuration 配置项通过代码进行配置，此时，通过命令行的配置项会失效

Configuration conf =new Configuration();conf.set("fs.defaultFS","hdfs://qunarcluster");conf.set("mapreduce.job.queuename","wirelessdev");conf.set("mapreduce.job.reduces","100");conf.set("mapreduce.job.priority","VERY_HIGH");conf.set("mapreduce.map.memory.mb","8192");conf.set("mapreduce.map.java.opts","-Xmx8192M");conf.set("mapreduce.reduce.memory.mb","8192");conf.set("mapreduce.reduce.java.opts","-Xmx8192M");

该情况下不支持-files，需要使用DistributedCache,默认hdfs路径

DistributedCache.addCacheFile(new Path("/user/wirelessdev/leofei.li/conf/mods.acid").toUri(), conf);

#推荐

Configuration conf =  getConf();        conf.set("mapreduce.job.queuename","wirelessdev");Job job = Job.getInstance(conf,"mods_firstjob_leofei.li");

到此，相信大家对"getConf与new Configuration怎么配置"有了更深的了解，不妨来实际操作一番吧！这里是网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！