Nutch相关框架视频教程(HadoopHbaseLuceneSolrTikaGora)(13-20讲).docx

Nutch相关框架视频教程 PAGE20 / NUMPAGES20 第十三讲 1、改变负载 三台机器，改变负载 host2(NameNode、DataNode、TaskTracker) host6(SecondaryNameNode、DataNode、TaskTracker) host8(JobTracker 、DataNode、TaskTracker) 指定SecondaryNameNode为host6： vi conf/masters指定host6 scp conf/masters host6:/home/hadoop/hadoop-1.1.2/conf/masters scp conf/masters host8:/home/hadoop/hadoop-1.1.2/conf/masters vi conf/hdfs-site.xml ???property???? namedfs.http.address/name???? valuehost2:50070/value???/property ???property namedfs.secondary.http.address/name valuehost6:50090/value ???/property scp conf/hdfs-site.xml host6:/home/hadoop/hadoop-1.1.2/conf/hdfs-site.xml scp conf/hdfs-site.xml host8:/home/hadoop/hadoop-1.1.2/conf/hdfs-site.xml 指定JobTracker为host8： vi conf/mapred-site.xml property namemapred.job.tracker/name valuehost8:9001/value /property scp conf/mapred-site.xml host6:/home/hadoop/hadoop-1.1.2/conf/mapred-site.xml scp conf/mapred-site.xml host8:/home/hadoop/hadoop-1.1.2/conf/mapred-site.xml vi conf/core-site.xml property namefs.checkpoint.dir/name value/home/hadoop/dfs/filesystem/namesecondary/value /property scp conf/core-site.xml host6:/home/hadoop/hadoop-1.1.2/conf/core-site.xml scp conf/core-site.xml host8:/home/hadoop/hadoop-1.1.2/conf/core-site.xml 配置host8： host8上的脚本start-mapred.sh会启动host2和host6上面的TaskTracker，所以需要对host8执行： ssh-keygen -t rsa（密码为空，路径默认） ssh-copy-id -i .ssh/id_rsa.pub hadoop@host2 ssh-copy-id -i .ssh/id_rsa.pub hadoop@host6 ssh-copy-id -i .ssh/id_rsa.pub hadoop@host8 可以在host8上面通过ssh无密码登陆host2和host6 ssh host2 ssh host6 ssh host8 在/home/hadoop/.bashrc 中追加： export PATH=/home/hadoop/hadoop-1.1.2/bin:$PATH host2: 执行start-dfs.sh host8: 执行start-mapred.sh 2、SecondaryNameNode ssh host6 停止secondarynamenode hadoop-1.1.2/bin/hadoop-daemon.sh stop secondarynamenode 强制合并fsimage和eidts hadoop-1.1.2/bin/hadoop secondarynamenode -checkpoint force ???动secondarynamenode hadoop-1.1.2/bin/hadoop-daemon.sh start secondarynamenode 3、启用回收站 property