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From "Shai Erera (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-4609) Write a PackedIntsEncoder/Decoder for facets
Date Mon, 10 Dec 2012 17:15:21 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-4609?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Shai Erera updated LUCENE-4609:
-------------------------------

    Summary: Write a PackedIntsEncoder/Decoder for facets  (was: Writer a PackedIntsEncoder/Decoder
for facets)
    
> Write a PackedIntsEncoder/Decoder for facets
> --------------------------------------------
>
>                 Key: LUCENE-4609
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4609
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: modules/facet
>            Reporter: Shai Erera
>            Priority: Minor
>
> Today the facets API lets you write IntEncoder/Decoder to encode/decode the category
ordinals. We have several such encoders, including VInt (default), and block encoders.
> It would be interesting to implement and benchmark a PackedIntsEncoder/Decoder, with
potentially two variants: (1) receives bitsPerValue up front, when you e.g. know that you
have a small taxonomy and the max value you can see and (2) one that decides for each doc
on the optimal bitsPerValue, writes it as a header in the byte[] or something.

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