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dfs.data.dir允许datanode存储数据块的目录不止一个。将数据复制到 HDFS 时,数据如何跨目录分布?
dfs.data.dir
当dfs.data.dir有多个值时,数据以循环方式复制到 HDFS。如果其中一个目录的磁盘已满,则将在其余目录上继续循环数据复制。