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https://issues.apache.org/jira/browse/HADOOP-7753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13136743#comment-13136743
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Todd Lipcon commented on HADOOP-7753:
-------------------------------------
Interesting, sync_file_range is getting EINVAL on the build machines. I
expected it would give ENOSYS if it had the wrong syscall. I will try to hunt
down a similar build machine and figure out what's going on. If I can't figure
it out, I'll split this into two patches - one for fadvise and another for
sync_file_range, which is less obviously useful.
> Support fadvise and sync_data_range in NativeIO, add ReadaheadPool class
> ------------------------------------------------------------------------
>
> Key: HADOOP-7753
> URL: https://issues.apache.org/jira/browse/HADOOP-7753
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: io, native
> Affects Versions: 0.23.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-7753.txt, hadoop-7753.txt, hadoop-7753.txt,
> hadoop-7753.txt
>
>
> This JIRA adds JNI wrappers for sync_data_range and posix_fadvise. It also
> implements a ReadaheadPool class for future use from HDFS and MapReduce.
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