Hi, I have read the documentation about HDFS snapshots for hadoop 2 ( http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/HdfsSnapshots.html) but it is still not clear how do I use this snapshots to restore the data.
Lets say I have a directory with the data corresponding to a Hive table that I want to backup. I take a snapshot today and tomorrow I find out that the modifications done to the table/directory after the snapshot are wrong and I want to revert the directory to the snapshot state. How do I achieve this? Also, can I extract the snapshot from HDFS and save it in an external storage and later use it to restore this directory in a new empty cluster? or which is the recommended way to do this? Thanks, Juan.
