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Mistakenly User Deleted A File, How Hadoop Remote From Its File System? Can U Roll Back It? |
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Answer» HDFS first renames its file NAME and place it in /trash directory for a configurable amount of TIME. In this scenario block might freed, but not file. After this time, Namenode deletes the file from HDFS name-space and MAKE file freed. It’s configurable as fs.trash.interval in core-site.xml. By default its VALUE is 1, you can set to 0 to delete file without storing in trash. HDFS first renames its file name and place it in /trash directory for a configurable amount of time. In this scenario block might freed, but not file. After this time, Namenode deletes the file from HDFS name-space and make file freed. It’s configurable as fs.trash.interval in core-site.xml. By default its value is 1, you can set to 0 to delete file without storing in trash. |
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