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https://issues.apache.org/jira/browse/HDDS-12895?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ivan Andika updated HDDS-12895:
-------------------------------
    Description: 
We need to see whether we should enable O_DIRECT (ExtendedOptions.DIRECT) in 
datanodes reads and writes. It has been supported since JDK 10 
([https://bugs.openjdk.org/browse/JDK-8164900])

Resources
 * 
[https://events19.linuxfoundation.org/wp-content/uploads/2017/11/Accelerating-IO-in-Big-Data-%E2%80%93-A-Data-Driven-Approach-and-Case-Studies-Yingqi-Lucy-Lu-Intel-Corporation.pdf]
 * https://github.com/facebook/rocksdb/wiki/Direct-IO

  was:
We need to see whether we should enable O_DIRECT (ExtendedOptions.DIRECT) in 
datanodes reads and writes. It has been supported since JDK 10 
(https://bugs.openjdk.org/browse/JDK-8164900)

Resources
 * 
[https://events19.linuxfoundation.org/wp-content/uploads/2017/11/Accelerating-IO-in-Big-Data-%E2%80%93-A-Data-Driven-Approach-and-Case-Studies-Yingqi-Lucy-Lu-Intel-Corporation.pdf]


> Explore O_DIRECT in Datanodes
> -----------------------------
>
>                 Key: HDDS-12895
>                 URL: https://issues.apache.org/jira/browse/HDDS-12895
>             Project: Apache Ozone
>          Issue Type: Improvement
>            Reporter: Ivan Andika
>            Assignee: Ivan Andika
>            Priority: Major
>
> We need to see whether we should enable O_DIRECT (ExtendedOptions.DIRECT) in 
> datanodes reads and writes. It has been supported since JDK 10 
> ([https://bugs.openjdk.org/browse/JDK-8164900])
> Resources
>  * 
> [https://events19.linuxfoundation.org/wp-content/uploads/2017/11/Accelerating-IO-in-Big-Data-%E2%80%93-A-Data-Driven-Approach-and-Case-Studies-Yingqi-Lucy-Lu-Intel-Corporation.pdf]
>  * https://github.com/facebook/rocksdb/wiki/Direct-IO



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