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https://issues.apache.org/jira/browse/HDFS-4179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Shvachko updated HDFS-4179:
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Attachment: BNAllowReads.patch
The patch
- makes BN accept read commands, but not CN.
- Checkpointer first uploads all files then loads them in memory.
- Safemode on BN should be set to unreachable threshold. Also there was an
assert triggered by doConsistencyCheck() for BN.
- Added a test case that verifies reads for BN and CN.
> BackupNode: allow reads, fix checkpointing, safeMode
> ----------------------------------------------------
>
> Key: HDFS-4179
> URL: https://issues.apache.org/jira/browse/HDFS-4179
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 2.0.2-alpha
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Attachments: BNAllowReads.patch
>
>
> BackupNode should be allowed to accept read command. Needs some adjustments
> in checkpointing and with safe mode.
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