[jira] [Commented] (LUCENE-5666) Add UninvertingReader

["Mikhail Khludnev (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-5666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15129040#comment-15129040 ] 

Mikhail Khludnev commented on LUCENE-5666:
------------------------------------------

Hello, 
I want to clarify 
DeleteByQueryWrapper [refers|https://github.com/apache/lucene-solr/commit/ff8e841fa1b26875a95fd3ec67cd785649ba35b3#diff-6f6dad2e619f95bbe7a7985700ab3060R38] to some caching
{{Even though we wrap for each query, UninvertingReader's core cache key is the inner one, so it still reuses fieldcaches and so on.}} 
We evidence that indexing stuck on repeatedly building UninversionMap for every deleteByQuery 
{code}  
 AtomicReader wrap(AtomicReader reader) {
    return new UninvertingReader(reader, schema.getUninversionMap(reader));  
}
{code}
Is there any chance to make it faster? 

> Add UninvertingReader
> ---------------------
>
>                 Key: LUCENE-5666
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5666
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Robert Muir
>             Fix For: 5.0, Trunk
>
>         Attachments: LUCENE-5666.patch
>
>
> Currently the fieldcache is not pluggable at all. It would be better if everything used the docvalues apis.
> This would allow people to customize the implementation, extend the classes with custom subclasses with additional stuff, etc etc.
> FieldCache can be accessed via the docvalues apis, using the FilterReader api.



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