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From "James Clampffer (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8790) Add Filesystem level stress tests
Date Thu, 16 Jul 2015 20:58:04 GMT
James Clampffer created HDFS-8790:
-------------------------------------

             Summary: Add Filesystem level stress tests
                 Key: HDFS-8790
                 URL: https://issues.apache.org/jira/browse/HDFS-8790
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: hdfs-client
            Reporter: James Clampffer
            Assignee: James Clampffer


I propose adding stress tests on libhdfs(3) compatibility layer was well as the async calls.
 These can be also used for basic performance metrics and inputs to profiling tools to see
improvements over time.

I'd like to make these tests into a seperate executable, or set of them, so that they can
be used for longer running tests on dedicated clusters that may already exist.  Each should
provide a simple command line interface for scripted or manual use.

Basic tests would be:
looped open-read-close
sequential scans
small random reads 

All tests will be parameterized for number of threads, read size, and upper and lower offset
bounds for a specified file.  This will make it much easier to detect and reproduce threading
issues and resource leaks as well as provide a simple executable (or set of executables) that
can be run with valgrind to gain a high confidence that the code is operating correctly.

I'd appreciate suggestions for any other simple stress tests.



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