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From "Jason Rutherglen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-3245) Realtime terms dictionary
Date Mon, 27 Jun 2011 19:21:47 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-3245?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Rutherglen updated LUCENE-3245:
-------------------------------------

    Attachment: LUCENE-3245.patch

Here's a cut with a first implementation of the CSLM and AIA terms dictionaries.  

I think we're ready to benchmark writes.

> Realtime terms dictionary
> -------------------------
>
>                 Key: LUCENE-3245
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3245
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: core/index
>    Affects Versions: 4.0
>            Reporter: Jason Rutherglen
>            Priority: Minor
>         Attachments: LUCENE-3245.patch, LUCENE-3245.patch, LUCENE-3245.patch
>
>
> For LUCENE-2312 we need a realtime terms dictionary.  While ConcurrentSkipListMap may
be used, it has drawbacks in terms of high object overhead which can impact GC collection
times and heap memory usage.  
> If we implement a skip list that uses primitive backing arrays, we can hopefully have
a data structure that is [as] fast and memory efficient.

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