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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1618) Allow setting the IndexWriter docstore to be a different directory
Date Tue, 28 Apr 2009 14:42:30 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12703658#action_12703658
] 

Yonik Seeley commented on LUCENE-1618:
--------------------------------------

As it relates to near real time, the search speed of the RAM directory in relation to FSDirectory
seems unimportant (what is this diff anyway?) - the FSDirectory will be much larger and that
is where the bulk of the search time will be.

It seems like the main benefit of RAMDirectory for NRT is faster creation time (no need to
create on-disk files, write them, then sync them), right?  Actually the sync is only needed
if a new segments file will be written... but there still may be synchronous metadata operations
for open-write-close of a file, depending on the FS?


> Allow setting the IndexWriter docstore to be a different directory
> ------------------------------------------------------------------
>
>                 Key: LUCENE-1618
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1618
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>    Affects Versions: 2.4.1
>            Reporter: Jason Rutherglen
>            Priority: Minor
>             Fix For: 2.9
>
>         Attachments: MemoryCachedDirectory.java
>
>   Original Estimate: 336h
>  Remaining Estimate: 336h
>
> Add an IndexWriter.setDocStoreDirectory method that allows doc
> stores to be placed in a different directory than the IW default
> dir.

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