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https://issues.apache.org/jira/browse/MAPREDUCE-2167?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ramkumar Vadali updated MAPREDUCE-2167:
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Attachment: MAPREDUCE-2167.4.patch
Fixed a broken test.
TEST RESULTS:
ant test-patch has the same number of failures as a clean checkout
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[exec] -1 overall.
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[exec] +1 @author. The patch does not contain any @author tags.
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[exec] +1 tests included. The patch appears to include 4 new or
modified tests.
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[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
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[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
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[exec] -1 findbugs. The patch appears to introduce 13 new Findbugs
warnings.
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[exec] -1 release audit. The applied patch generated 2 release audit
warnings (more than the trunk's current 1 warnings).
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[exec] +1 system test framework. The patch passed system test
framework compile.
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======================================================================
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[exec] Finished build.
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{code}
ant test succeeds:
{code}
test-junit:
[junit] WARNING: multiple versions of ant detected in path for junit
[junit]
jar:file:/home/rvadali/local/external/ant/lib/ant.jar!/org/apache/tools/ant/Project.class
[junit] and
jar:file:/home/rvadali/.ivy2/cache/ant/ant/jars/ant-1.6.5.jar!/org/apache/tools/ant/Project.class
[junit] Running org.apache.hadoop.hdfs.TestRaidDfs
[junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 47.071 sec
[junit] Running org.apache.hadoop.raid.TestBlockFixer
[junit] Tests run: 5, Failures: 0, Errors: 0, Time elapsed: 124.583 sec
[junit] Running org.apache.hadoop.raid.TestDirectoryTraversal
[junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 9.337 sec
[junit] Running org.apache.hadoop.raid.TestErasureCodes
[junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 24.481 sec
[junit] Running org.apache.hadoop.raid.TestGaloisField
[junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.392 sec
[junit] Running org.apache.hadoop.raid.TestHarIndexParser
[junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.052 sec
[junit] Running org.apache.hadoop.raid.TestRaidFilter
[junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 4.485 sec
[junit] Running org.apache.hadoop.raid.TestRaidHar
[junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 71.136 sec
[junit] Running org.apache.hadoop.raid.TestRaidNode
[junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 471.072 sec
[junit] Running org.apache.hadoop.raid.TestRaidPurge
[junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 107.828 sec
[junit] Running org.apache.hadoop.raid.TestRaidShell
[junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 25.714 sec
test:
BUILD SUCCESSFUL
Total time: 15 minutes 6 seconds
{code}
> Faster directory traversal for raid node
> ----------------------------------------
>
> Key: MAPREDUCE-2167
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2167
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: contrib/raid
> Reporter: Ramkumar Vadali
> Assignee: Ramkumar Vadali
> Attachments: MAPREDUCE-2167.2.patch, MAPREDUCE-2167.3.patch,
> MAPREDUCE-2167.4.patch, MAPREDUCE-2167.patch
>
>
> The RaidNode currently iterates over the directory structure to figure out
> which files to RAID. With millions of files, this can take a long time -
> especially if some files are already RAIDed and the RaidNode needs to look at
> parity files / parity file HARs to determine if the file needs to be RAIDed.
> The directory traversal is encapsulated inside the class DirectoryTraversal,
> which examines one file at a time, using the caller's thread.
> My proposal is to make this multi-threaded as follows:
> * use a pool of threads inside DirectoryTraversal
> * The caller's thread is used to retrieve directories, and each new
> directory is assigned to a thread in the pool. The worker thread examines all
> the files the directory.
> * If there sub-directories, those are added back as workitems to the pool.
> Comments?
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