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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2886) Adaptive Frame Of Reference
Date Fri, 04 Feb 2011 11:32:28 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12990534#comment-12990534
] 

Robert Muir commented on LUCENE-2886:
-------------------------------------

bq. Hi Michael, Robert,
great to hear that the code is useful, looking forward to see some benchmark.
I think the VarIntBlock approach is a good idea. Concerning the two unused "frame" codes,
it will not cost too much to add them. This might be useful for the frequency inverted lists.
However, I am not sure they will be used that much. 

In the case of 240 1's, i was surprised to see this selector was used over 2% of the time
for the gov collection's doc file?

But still, for the all 1's case I'm not actually thinking about unstructured text so much...

in this case I am thinking about metadata fields and more structured data?


> Adaptive Frame Of Reference 
> ----------------------------
>
>                 Key: LUCENE-2886
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2886
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Codecs
>            Reporter: Renaud Delbru
>             Fix For: 4.0
>
>         Attachments: LUCENE-2886_simple64.patch, LUCENE-2886_simple64_varint.patch, lucene-afor.tar.gz
>
>
> We could test the implementation of the Adaptive Frame Of Reference [1] on the lucene-4.0
branch.
> I am providing the source code of its implementation. Some work needs to be done, as
this implementation is working on the old lucene-1458 branch. 
> I will attach a tarball containing a running version (with tests) of the AFOR implementation,
as well as the implementations of PFOR and of Simple64 (simple family codec working on 64bits
word) that has been used in the experiments in [1].
> [1] http://www.deri.ie/fileadmin/documents/deri-tr-afor.pdf

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