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[HDFS-4817] make HDFS advisory caching configurable on a per-file basis - HDFS - [issue]
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...HADOOP-7753 and related JIRAs introduced some performance optimizations for the DataNode. One of them was readahead. When readahead is enabled, the DataNode starts reading the ne...
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http://issues.apache.org/jira/browse/HDFS-4817
Author: Colin Patrick McCabe,
2013-05-23, 22:12
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[HDFS-4839] add NativeIO#mkdirs, that provides an error message on failure - HDFS - [issue]
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...It would be nice to have a variant of mkdirs that provided an error message explaining why it failed. This would make it easier to debug certain failing unit tests that rely on mkdir /...
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http://issues.apache.org/jira/browse/HDFS-4839
Author: Colin Patrick McCabe,
2013-05-22, 04:05
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[HDFS-4428] FsDatasetImpl should disclose what the error is when a rename fails - HDFS - [issue]
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...It would be nice if FsDatasetImpl would print out an error message when a rename fails, describing what went wrong. This would make it a lot easier to investigate and resolve test fail...
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http://issues.apache.org/jira/browse/HDFS-4428
Author: Colin Patrick McCabe,
2013-05-22, 03:53
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[HDFS-4698] provide client-side metrics for remote reads, local reads, and short-circuit reads - HDFS - [issue]
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...We should provide metrics to let clients know how many bytes of data they have read remotely, versus locally or via short-circuit local reads. This will allow clients to know how well ...
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http://issues.apache.org/jira/browse/HDFS-4698
Author: Colin Patrick McCabe,
2013-05-16, 08:11
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[HDFS-3638] backport HDFS-3568 (add security to fuse_dfs) to branch-1 - HDFS - [issue]
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...Backport HDFS-3568 to branch-1. This will give fuse_dfs support for Kerberos authentication, allowing FUSE to be used in a secure cluster....
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http://issues.apache.org/jira/browse/HDFS-3638
Author: Colin Patrick McCabe,
2013-05-14, 06:12
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[HDFS-4352] Encapsulate arguments to BlockReaderFactory in a class - HDFS - [issue]
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...Encapsulate the arguments to BlockReaderFactory in a class to avoid having to pass around 10+ arguments to a few different functions....
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http://issues.apache.org/jira/browse/HDFS-4352
Author: Colin Patrick McCabe,
2013-05-10, 23:51
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[HDFS-4661] fix various bugs in short circuit read - HDFS - [issue]
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...For the log statement in DataXceiver below, it has two String.format(..); it uses %s for string constants.BlockSender.ClientTraceLog.info(String.format( &...
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http://issues.apache.org/jira/browse/HDFS-4661
Author: Colin Patrick McCabe,
2013-05-10, 15:06
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[HDFS-4812] add hdfsReadFully, hdfsWriteFully - HDFS - [issue]
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...It would be nice to have hdfsReadFully and hdfsWriteFully in libhdfs. The current APIs don't guarantee that we read or write as much as we're told to do. We have readFully and wr...
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http://issues.apache.org/jira/browse/HDFS-4812
Author: Colin Patrick McCabe,
2013-05-10, 03:17
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[HDFS-3596] Improve FSEditLog pre-allocation in branch-1 - HDFS - [issue]
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...Implement HDFS-3510 in branch-1. This will improve FSEditLog preallocation to decrease the incidence of corrupted logs after disk full conditions. (See HDFS-3510 for a longer des...
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http://issues.apache.org/jira/browse/HDFS-3596
Author: Colin Patrick McCabe,
2013-05-02, 22:52
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[HDFS-4504] DFSOutputStream#close doesn't always release resources (such as leases) - HDFS - [issue]
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...DFSOutputStream#close can throw an IOException in some cases. One example is if there is a pipeline error and then pipeline recovery fails. Unfortunately, in this case, some of t...
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http://issues.apache.org/jira/browse/HDFS-4504
Author: Colin Patrick McCabe,
2013-04-24, 22:32
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