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From "Jason Rutherglen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1313) Realtime Search
Date Mon, 27 Apr 2009 19:51:30 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12703317#action_12703317
] 

Jason Rutherglen commented on LUCENE-1313:
------------------------------------------

{quote}we should make with NRT is to not close the doc store
(stored fields, term vector) files when flushing for an NRT
reader. {quote}

Agreed, I think this feature is a must otherwise we're doing
unnecessary in ram merging.  

{quote}we'd need to be able to somehow share an IndexInput &
IndexOutput; or, perhaps we can open an IndexInput even though
an IndexOutput{quote}

I ran into problems with this before, I was trying to reuse
Directory to write a transaction log. It seemed theoretically
doable however it didn't work in practice. It could have been
the seeking and replacing but I don't remember. FSIndexOutput
uses a writeable RAF and FSIndexInput is read only why would
there be an issue?




> Realtime Search
> ---------------
>
>                 Key: LUCENE-1313
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1313
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Index
>    Affects Versions: 2.4.1
>            Reporter: Jason Rutherglen
>            Priority: Minor
>             Fix For: 2.9
>
>         Attachments: LUCENE-1313.jar, LUCENE-1313.patch, LUCENE-1313.patch, LUCENE-1313.patch,
LUCENE-1313.patch, lucene-1313.patch, lucene-1313.patch, lucene-1313.patch, lucene-1313.patch
>
>
> Realtime search with transactional semantics.  
> Possible future directions:
>   * Optimistic concurrency
>   * Replication
> Encoding each transaction into a set of bytes by writing to a RAMDirectory enables replication.
 It is difficult to replicate using other methods because while the document may easily be
serialized, the analyzer cannot.
> I think this issue can hold realtime benchmarks which include indexing and searching
concurrently.

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