anujmodi2021 opened a new pull request, #7835: URL: https://github.com/apache/hadoop/pull/7835
### Description of PR JIRA: https://issues.apache.org/jira/browse/HADOOP-19641 We have observed this across multiple workload runs that when we start reading data from input stream. The first read which came to input stream has to be read synchronously even if we trigger prefetch request for that particular offset. Most of the times we end up doing extra work of checking if the prefetch is trigerred, removing prefetch from the pending queue and go ahead to do a direct remote read in workload thread itself. To avoid all this overhead, we will always bypass read ahead for the very first read of each input stream and trigger read aheads for second read onwards. ### How was this patch tested? TBA -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
