- Namenode enters Safemode
- Replication does not occur in Safemode
- Each Datanode sends Heartbeat
- Each Datanode sends Blockreport
- Lists all HDFS data blocks
- Namenode creates Blockmap from Blockreports
- Namenode exits Safemode
- Replicate any under-replicated blocks
Showing posts with label hadoop startup process. Show all posts
Showing posts with label hadoop startup process. Show all posts
Wednesday, February 19, 2014
What is the namenode startup process steps?
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