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ASF GitHub Bot commented on CASSANDRA-14466: -------------------------------------------- GitHub user aweisberg opened a pull request: https://github.com/apache/cassandra/pull/232 Enable Direct I/O Patch by Mulugeta Mammo; Reviewed by Ariel Weisberg for CASSANDRA-14466 You can merge this pull request into a Git repository by running: $ git pull https://github.com/aweisberg/cassandra cassandra-14466-trunk Alternatively you can review and apply these changes as the patch at: https://github.com/apache/cassandra/pull/232.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #232 ---- commit d221e254c1d248aafd96ab2c7f3f15751c81d384 Author: =Mulugeta Mammo <mulugeta.mammo@...> Date: 2018-06-05T22:36:08Z Enable Direct I/O Patch by Mulugeta Mammo; Reviewed by Ariel Weisberg for CASSANDRA-14466 ---- > Enable Direct I/O > ------------------ > > Key: CASSANDRA-14466 > URL: https://issues.apache.org/jira/browse/CASSANDRA-14466 > Project: Cassandra > Issue Type: New Feature > Components: Local Write-Read Paths > Reporter: Mulugeta Mammo > Priority: Major > Attachments: direct_io.patch > > > Hi, > JDK 10 introduced a new API for Direct IO that enables applications to bypass > the file system cache and potentially improve performance. Details of this > feature can be found at [https://bugs.openjdk.java.net/browse/JDK-8164900]. > This patch uses the JDK 10 API to enable Direct IO for the Cassandra read > path. By default, we have disabled this feature; but it can be enabled using > a new configuration parameter, enable_direct_io_for_read_path. We have > conducted a Cassandra read-only stress test and measured a throughput gain of > up to 60% on flash drives. > The patch requires JDK 10 Cassandra Support - > https://issues.apache.org/jira/browse/CASSANDRA-9608 > Please review the patch and let us know your feedback. > Thanks, > [^direct_io.patch] > -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org