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Posted to commits@nifi.apache.org by "Puspendu Banerjee (JIRA)" <ji...@apache.org> on 2016/02/03 00:03:39 UTC

[jira] [Updated] (NIFI-1460) Test Performance improvement. Test Timeout Mitigation.

     [ https://issues.apache.org/jira/browse/NIFI-1460?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Puspendu Banerjee updated NIFI-1460:
------------------------------------
    Description: 
Existing test case nifi-framework-core/src/test/java/org/apache/nifi/controller/TestStandardFlowFileQueue.java uses a huge number of call to UUID.randomUUID() which is very slow in linux , unix environment if there is not much activity [ like mouse move etc.] .In addition to that UUID.randomUUID() depends on /dev/(u)random to get a random number, such system call costs IO and /dev/random is bandwidth/rate limited  which again slows down overall performance.

Workaround is rngd daemon(ref: http://linux.die.net/man/8/rngd)

  was:
Existing test case nifi-framework-core/src/test/java/org/apache/nifi/controller/TestStandardFlowFileQueue.java uses a huge number of call to UUID.randomUUID() which is very slow in linux , unix environment if there is not much activity [ like mouse move etc.] .In addition to that UUID.randomUUID() depends on /dev/(u)random to get a random number, such system call costs IO and /dev/random is bandwidth/rate limited  which again slows down overall performance.



> Test Performance improvement. Test Timeout Mitigation.
> ------------------------------------------------------
>
>                 Key: NIFI-1460
>                 URL: https://issues.apache.org/jira/browse/NIFI-1460
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Core Framework, Tools and Build
>    Affects Versions: 0.4.1
>         Environment: linux, unix with true random number generator.
>            Reporter: Puspendu Banerjee
>            Priority: Minor
>              Labels: performance
>             Fix For: 0.5.0
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> Existing test case nifi-framework-core/src/test/java/org/apache/nifi/controller/TestStandardFlowFileQueue.java uses a huge number of call to UUID.randomUUID() which is very slow in linux , unix environment if there is not much activity [ like mouse move etc.] .In addition to that UUID.randomUUID() depends on /dev/(u)random to get a random number, such system call costs IO and /dev/random is bandwidth/rate limited  which again slows down overall performance.
> Workaround is rngd daemon(ref: http://linux.die.net/man/8/rngd)



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