Colin Patrick McCabe created HDFS-3510:
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Summary: Some FSEditLog pre-allocation problems in branch-1
Key: HDFS-3510
URL: https://issues.apache.org/jira/browse/HDFS-3510
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 1.0.0
Reporter: Colin Patrick McCabe
Assignee: Colin Patrick McCabe
Fix For: 1.0.0
In the FSEditLog, we want to avoid running out of space in the middle of
writing an edit log operation to the disk. We do this by a process called
"preallocation"-- reserving space on the disk for the upcoming edit log entries
before beginning to write them.
branch-1 has some major problems with the way it does preallocation. These
problems can lead to corrupt edit logs when the disk runs out of space during
an edit log sync operation.
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