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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1313) Realtime Search
Date Mon, 27 Apr 2009 22:17:30 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12703419#action_12703419
] 

Michael McCandless commented on LUCENE-1313:
--------------------------------------------

{quote}
Sometimes we want a mixture of
RAMDir segments and FSDir segments to merge (when we've decided
we have too much in ram),
{quote}

I don't think we want to mix RAM & disk merging?

EG when RAM is full, we want to quickly flush it to disk as a single
segment.  Merging with disk segments only makes that flush slower?

{quote}
I'm still a little confused as to
why having a wrapper class that manages a disk writer and a ram
writer isn't cleaner?
{quote}

This is functionally the same as not mixing RAM vs disk merging,
right (ie just as "clean")?


> 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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