Scott A. Wehner created HDFS-14572:
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Summary: Disk Maintenance
Key: HDFS-14572
URL: https://issues.apache.org/jira/browse/HDFS-14572
Project: Hadoop HDFS
Issue Type: New Feature
Components: balancer & mover, block placement, datanode
Environment: hot swappable disks
Reporter: Scott A. Wehner
Like putting datanodes into maintenance mode, I don't want to have to reduce
capacity to swap out failing drives in a hot swappable environment. I'd like
to have a list of datanodes and storageIDs or datanode and mountpoints in a
file that can act like the nodes in mainenance mode. This can ensure that
blocks are replicated correctly and all replicas that exist on failing but not
failed disks can be read off and replicated while the volumes are read only in
hdfs land.
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