Differences
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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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hdfs [2016/04/19 09:36] steve |
hdfs [2016/04/21 08:32] steve |
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| Line 66: | Line 66: | ||
| <code> | <code> | ||
| - | hdfs dfs -copyToLocal /user/beandog/bigdata /var/archives/bigdata | + | hdfs dfs -copyToLocal /user/beandog/bigdata /home/beandog/bigdata.bak |
| </code> | </code> | ||
| Line 88: | Line 88: | ||
| <code> | <code> | ||
| hadoop-node4.lan | hadoop-node4.lan | ||
| + | </code> | ||
| + | |||
| + | Tell the NameNode to refresh the nodes: | ||
| + | |||
| + | <code> | ||
| + | hdfs dfsadmin -refreshNamenodes | ||
| + | </code> | ||
| + | |||
| + | The HDFS node will be decomissioned, which will take some time. You can view the status either through the web interface, or using ''hdfs dfsadmin'': | ||
| + | |||
| + | <code> | ||
| + | hdfs dfsadmin -report | ||
| + | </code> | ||
| + | |||
| + | Once the node is completely decommissioned, you can remove it from the ''slaves'' file in your Hadoop configuration directory, and restart HDFS: | ||
| + | |||
| + | <code> | ||
| + | stop-dfs.sh | ||
| + | start-dfs.sh | ||
| </code> | </code> | ||
