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https://issues.apache.org/jira/browse/BOOKKEEPER-816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15976792#comment-15976792
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ASF GitHub Bot commented on BOOKKEEPER-816:
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Github user eolivelli commented on the issue:

    https://github.com/apache/bookkeeper/pull/80
  
    @sijie on the logs of tests (I'm running the build on Linux x64 Fedora) now 
I have plenty of these errors:
    
    > 2017-04-20 16:07:01,815 - INFO  - [BookieJournal-15001:NativeIO@41] - 
Loading bookkeeper native library.
    > 2017-04-20 16:07:01,815 - INFO  - [BookieJournal-15001:NativeIO@46] - 
Unable to load bookkeeper native library. Native methods will be disabled : 
    > java.lang.UnsatisfiedLinkError: no bookkeeper in java.library.path
    >         at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1867)
    >         at java.lang.Runtime.loadLibrary0(Runtime.java:870)
    >         at java.lang.System.loadLibrary(System.java:1122)
    >         at org.apache.bookkeeper.util.NativeIO.<clinit>(NativeIO.java:42)
    
    Is there any way to:
    - create less logs
    - run the tests with the native library automatically in the library path ?



> use native fallocate & sync_file_range to improve journal allocation
> --------------------------------------------------------------------
>
>                 Key: BOOKKEEPER-816
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-816
>             Project: Bookkeeper
>          Issue Type: Improvement
>          Components: bookkeeper-server
>            Reporter: Sijie Guo
>            Assignee: Sijie Guo
>             Fix For: 4.5.0
>
>
> it'd better to leverage filesystem fallocate & sync_file_range for journal 
> performance.



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