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From "Simon Willnauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2589) Add a variable-sized int block codec
Date Sun, 08 Aug 2010 20:13:16 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12896406#action_12896406
] 

Simon Willnauer commented on LUCENE-2589:
-----------------------------------------

{quote}Actually i would prefer we just fix LuceneTestCase etc so that each test class has
a single static random seed, then there would be less parameters. Then we can change the failure
message to just say 'reproduce with -D....' and I think it would be best.{quote}

A single random seed per TestCase / Class would make things way easier IMO and I would agree
that we should have that per Class. Nevertheless, would that deprecate all parameters? When
I want to use randomized tests but need to force a certain codec that wouldn't work. Anyway,
a documentation of whatever we do here would help people new to lucene to get started with
patches and test.

> Add a variable-sized int block codec
> ------------------------------------
>
>                 Key: LUCENE-2589
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2589
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 4.0
>
>         Attachments: LUCENE-2589.patch, LUCENE-2589.patch
>
>
> We already have support for fixed block size int block codecs, making it very simple
to create a codec from a int encoder algorithms like FOR/PFOR.
> But algorithms like Simple9/16 are not fixed -- they encode a variable number of adjacent
ints at once, depending on the specific values of those ints.

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