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Jason Rutherglen commented on LUCENE-2500: ------------------------------------------ DirectIOLinuxDirectory is in trunk and works? Are we using it with segment merging yet? Perhaps a separate Jira issue? > A Linux-specific Directory impl that bypasses the buffer cache > -------------------------------------------------------------- > > Key: LUCENE-2500 > URL: https://issues.apache.org/jira/browse/LUCENE-2500 > Project: Lucene - Java > Issue Type: Improvement > Components: contrib/* > Reporter: Michael McCandless > Assignee: Michael McCandless > Fix For: 3.1, 4.0 > > Attachments: LUCENE-2500.patch > > > I've been testing how we could prevent Lucene's merges from evicting > pages from the OS's buffer cache. I tried fadvise/madvise (via JNI) > but (frustratingly), I could not get them to work (details at > http://chbits.blogspot.com/2010/06/lucene-and-fadvisemadvise.html). > The only thing that worked was to use Linux's O_DIRECT flag, which > forces all IO to bypass the buffer cache entirely... so I created a > Linux-specific Directory impl to do this. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org