Shulou(Shulou.com)06/03 Report--

1. Format namenode node hdfs namenode-format

two。 Note that formatting commands can only be used on specified namenode nodes

3. What does the format command do? The fsp_w_picpath file is generated, and the formatted directory and file cd / opt/hadoop-2.5/lscd dfs/name/lscd current/ls are viewed by the following command

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