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Posted to hdfs-dev@hadoop.apache.org by "dragon (JIRA)" <ji...@apache.org> on 2016/03/15 09:17:35 UTC
[jira] [Created] (HDFS-10129) CLONE - Erasure Coding: revisit
replica counting for striped blocks
dragon created HDFS-10129:
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Summary: CLONE - Erasure Coding: revisit replica counting for striped blocks
Key: HDFS-10129
URL: https://issues.apache.org/jira/browse/HDFS-10129
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: dragon
Assignee: Jing Zhao
Currently we use the same {{BlockManager#countNodes}} method for striped blocks, which simply treat each internal block as a replica. However, for a striped block, we may have more complicated scenario, e.g., we have multiple replicas of the first internal block while we miss some other internal blocks. Using the current {{countNodes}} methods can lead to wrong decision in these scenarios.
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