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Posted to hdfs-dev@hadoop.apache.org by "dhruba borthakur (JIRA)" <ji...@apache.org> on 2010/06/04 09:21:11 UTC
[jira] Resolved: (HDFS-200) In HDFS, sync() not yet guarantees data
available to the new readers
[ https://issues.apache.org/jira/browse/HDFS-200?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
dhruba borthakur resolved HDFS-200.
-----------------------------------
Resolution: Fixed
I committed this into 0.20-append branch.
> In HDFS, sync() not yet guarantees data available to the new readers
> --------------------------------------------------------------------
>
> Key: HDFS-200
> URL: https://issues.apache.org/jira/browse/HDFS-200
> Project: Hadoop HDFS
> Issue Type: New Feature
> Affects Versions: 0.20-append
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: dhruba borthakur
> Priority: Blocker
> Fix For: 0.20-append
>
> Attachments: 4379_20081010TC3.java, checkLeases-fix-1.txt, checkLeases-fix-unit-test-1.txt, fsyncConcurrentReaders.txt, fsyncConcurrentReaders11_20.txt, fsyncConcurrentReaders12_20.txt, fsyncConcurrentReaders13_20.txt, fsyncConcurrentReaders14_20.txt, fsyncConcurrentReaders15_20.txt, fsyncConcurrentReaders16_20.txt, fsyncConcurrentReaders3.patch, fsyncConcurrentReaders4.patch, fsyncConcurrentReaders5.txt, fsyncConcurrentReaders6.patch, fsyncConcurrentReaders9.patch, hadoop-stack-namenode-aa0-000-12.u.powerset.com.log.gz, hdfs-200-ryan-existing-file-fail.txt, hypertable-namenode.log.gz, namenode.log, namenode.log, Reader.java, Reader.java, reopen_test.sh, ReopenProblem.java, Writer.java, Writer.java
>
>
> In the append design doc (https://issues.apache.org/jira/secure/attachment/12370562/Appends.doc), it says
> * A reader is guaranteed to be able to read data that was 'flushed' before the reader opened the file
> However, this feature is not yet implemented. Note that the operation 'flushed' is now called "sync".
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