[jira] [Commented] (ROCKETMQ-317) Make full use of Linux native libaio

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ROCKETMQ-317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16264356#comment-16264356 ] 

ASF GitHub Bot commented on ROCKETMQ-317:
-----------------------------------------

lizhanhui opened a new pull request #195: [ROCKETMQ-317] Take advantage of Linux native libaio
URL: https://github.com/apache/rocketmq/pull/195
 
 
   ## What is the purpose of the change
   
   This PR is to make use of the Linux native libaio interfaces in cases where mmap commit log files are no longer in main memory.  Two desired changes, in theory, will be brought about: 1) GC overhead is relieved as data is no longer passed through Java heap; 2) We can continue to use zero-copy.
   
   Discussions are welcome.
   
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> Make full use of Linux native libaio 
> -------------------------------------
>
>                 Key: ROCKETMQ-317
>                 URL: https://issues.apache.org/jira/browse/ROCKETMQ-317
>             Project: Apache RocketMQ
>          Issue Type: Improvement
>            Reporter: Zhanhui Li
>            Assignee: vongosling
>
> libaio is a library, developed as part of the Linux kernel project. With libaio, writes are submitted to the operating system where they are processed asynchronously. When the writes have been processed, the operating system calls the code back.
> When messages being pulled were reclaimed out of main memory, making use of Linux native AIO system calls still allows zero-copy without blocking netty IO threads.
> https://activemq.apache.org/artemis/docs/latest/libaio.html
> https://www.ibm.com/developerworks/library/l-async/
> https://access.redhat.com/documentation/en-us/jboss_enterprise_application_platform/5/html/hornetq_user_guide/libaio
> https://stackoverflow.com/questions/8768083/difference-between-posix-aio-and-libaio-on-linux



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