[
https://issues.apache.org/jira/browse/HADOOP-17296?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Sneha Vijayarajan updated HADOOP-17296:
---------------------------------------
Status: Patch Available (was: Open)
> ABFS: Allow Random Reads to be of Buffer Size
> ---------------------------------------------
>
> Key: HADOOP-17296
> URL: https://issues.apache.org/jira/browse/HADOOP-17296
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/azure
> Affects Versions: 3.3.0
> Reporter: Sneha Vijayarajan
> Assignee: Sneha Vijayarajan
> Priority: Major
> Labels: abfsactive
>
> ADLS Gen2/ABFS driver is optimized to read only the bytes that are requested
> for when the read pattern is random.
> It was observed in some spark jobs that though the reads are random, the next
> read doesn't skip by a lot and can be served by the earlier read if read was
> done in buffer size. As a result the job triggered a higher count of read
> calls and resulted in higher job runtime.
> When these jobs were run against Gen1 which always reads in buffer size , the
> jobs fared well.
> In this Jira we try to provide a control over config on random read to be of
> requested size or buffer size.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org
For additional commands, e-mail: common-issues-h...@hadoop.apache.org
