lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-2500) A Linux-specific Directory impl that bypasses the buffer cache
Date Tue, 15 Jun 2010 13:19:22 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-2500?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael McCandless updated LUCENE-2500:
---------------------------------------

    Attachment: LUCENE-2500.patch

Attached patch, with new Directory impl DirectIOLinuxDirectory.

> 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
>         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-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message