James Thomas created HDFS-6482:
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Summary: Use block ID-based block layout on datanodes
Key: HDFS-6482
URL: https://issues.apache.org/jira/browse/HDFS-6482
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode
Affects Versions: 2.5.0
Reporter: James Thomas
Assignee: James Thomas
Fix For: 2.5.0
Right now blocks are placed into directories that are split into many
subdirectories when capacity is reached. Instead we can use a block's ID to
determine the path it should go in. This eliminates the need for the LDir data
structure that facilitates the splitting of directories when they reach
capacity as well as fields in ReplicaInfo that keep track of a replica's
location.
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