hadoop snapshot 备份恢复

原文地址：http://blog.csdn.net/linlinv3/article/details/44622203 通过snapshot实现 hdfs上文件的备份 api地址请见http://archive.cloudera.com/cdh5/cdh/5/hadoop-2.5.0-cdh5.2.0/hadoop-project-dist/hadoop-hdfs/HdfsSnapshots.ht

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