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Todd Lipcon (JIRA) |
at Jul 4, 2011 at 10:48 pm
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https://issues.apache.org/jira/browse/HDFS-2123?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon resolved HDFS-2123.
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Resolution: Fixed
Release Note: The SecondaryNameNode and CheckpointNode no longer respect the value of 'dfs.namenode.checkpoint.size' (formerly known as 'fs.checkpoint.size' in 0.20 and before). Instead, use the new configuration 'dfs.namenode.checkpoint.txns' to specify the number of transactions after which the checkpointer will trigger a new checkpoint.
Hadoop Flags: [Incompatible change, Reviewed]
1073: Checkpoint interval should be based on txn count, not size
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Key: HDFS-2123
URL:
https://issues.apache.org/jira/browse/HDFS-2123Project: Hadoop HDFS
Issue Type: Sub-task
Components: name-node
Affects Versions: Edit log branch (HDFS-1073)
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Fix For: Edit log branch (HDFS-1073)
Attachments: hdfs-2123.txt, hdfs-2123.txt
Currently, the administrator can configure the secondary namenode to checkpoint either every N seconds, or every N bytes worth of edit log. It would make more sense to get rid of the size-based interval and instead allow the administrator to specify checkpoints every N transactions. This also simplifies the code a little bit.
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