[ https://issues.apache.org/jira/browse/LUCENE-8982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17232968#comment-17232968 ]
Dawid Weiss commented on LUCENE-8982: ------------------------------------- You can set -Pbuild.native=true manually on those VMs you know the tools are available... I don't think duplicating whatever logic gradle uses to detect those toolschains automatically is worth the effort, to be honest. The logic is probably in gradle's sources somewhere. I don't know if it can be done easier than by copying from their code. > Make NativeUnixDirectory pure java now that direct IO is possible > ----------------------------------------------------------------- > > Key: LUCENE-8982 > URL: https://issues.apache.org/jira/browse/LUCENE-8982 > Project: Lucene - Core > Issue Type: Improvement > Components: modules/misc > Reporter: Michael McCandless > Assignee: Dawid Weiss > Priority: Major > Time Spent: 9h > Remaining Estimate: 0h > > {{NativeUnixDirectory}} is a {{Directory}} implementation that uses direct IO > to write newly merged segments. Direct IO bypasses the kernel's buffer cache > and write cache, making merge writes "invisible" to the kernel, though the > reads for merging the N segments are still going through the kernel. > But today, {{NativeUnixDirectory}} uses a small JNI wrapper to access the > {{O_DIRECT}} flag to {{open}} ... since JDK9 we can now pass that flag in > pure java code, so we should now fix {{NativeUnixDirectory}} to not use JNI > anymore. > We should also run some more realistic benchmarks seeing if this option > really helps nodes that are doing concurrent indexing (merging) and searching. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org