Using HDFS snapshots for data protection
HDFS snapshots enable you to capture point-in-time copies of the file system and protect your important data against user or application errors. Cloudera recommends that you take snapshots of specified subtrees on the file system.
- Snapshot creation is instantaneous regardless of the size and depth of the directory subtree.
- Snapshots capture the block list and file size for a specified subtree. Snapshots do not create extra copies of blocks on the file system.
You can either use the command-line interface or Cloudera Manager to manage HDFS snapshots.