Kihwal Lee created HDFS-5586:
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Summary: Add quick-restart option for datanode
Key: HDFS-5586
URL: https://issues.apache.org/jira/browse/HDFS-5586
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Kihwal Lee
This feature, combined with the graceful shutdown feature, will enable data
nodes to come back up and start serving quickly. This is likely a command line
option for data node, which triggers it to look for saved state information in
its local storage. If the information is present and reasonably up-to-date,
data node would skip some of the startup steps.
Ideally it should be able to do quick registration without requiring removal of
all blocks from the date node descriptor on the name node and reconstructing it
with the initial full block report.
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