Package org.apache.hadoop.hdfs.server.datanode
package org.apache.hadoop.hdfs.server.datanode
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ClassDescriptionBlockMetadataHeader manages metadata for data blocks on Datanodes.The caching strategy we should use for an HDFS read or write operation.Exception object that is thrown when the block metadata file is corrupt.Keeps track of how much work has finished.Helper class that reports how much work has has been done by the node.A class that is used to report each work item that we are working on.Various result values.Exception indicating that DataNode does not have a replica that matches the target block.