Hi All, While discussing about Hadoop backup & restore plan with my team I thought about a scenario I wanted to ask you about:
I wonder what will happen following the steps below: 1. Backup the namenode's metadata (fsimage & edits log). 2. Adding files to the Hadoop clutser. 3. Deleting files from the Hadoop cluster. 4. Corruption in the namenode's metadata or whatever. 5. Restoring the namenode's metadata which I backed up (step 1). How the namenode handle the blocks written or deleted before the corruption ? Will I have access to them ? Is there any procedure I need to do in order to "fix" the gap created in the time since the last backup? Thanks. Avi
