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From Ajay Garg <ajaygargn...@gmail.com>
Subject Re: Query in IndexWriter.deleteDocuments(Term term)
Date Sat, 26 Jul 2008 13:27:25 GMT

So commit() will be available from 2.4 onwards??

Michael McCandless-2 wrote:
> 
> 
> Ajay Garg wrote:
> 
>> Thanks Mike. That was quite explanatory. A couple of doubts:
> 
> You're welcome!
> 
>> 1. The deletions apply to buffered as well as stored-in-RAM documents.
>> Right. So, if the index directory contains 1 document that matches a
>> deleteDocument query, and 1 document in RAM that contains the same
>> deleteDocument query, then, will the document-in-index-directory be  
>> deleted
>> immediately, or when a flush is called. (It seems logical, that  
>> irrespective
>> of the location of document, "actual" deletion occurs only when a  
>> flush is
>> called .. just need to be doubly sure ...)
> 
> Well ... the "actual" deletion (visible to an IndexReader that opens  
> the index) is only guaranteed to be performed if you call commit()  
> (trunk) or close() (2.3, trunk) on the IW.
> 
> First, deleted docIDs, terms and queries are simply buffered in RAM.   
> Then at some point (no guarantee on when) they are flushed into per- 
> segment .del files in the directory, but, these del files are  
> "unreferenced" (by a segments_N file) until commit() or close() is  
> called.
> 
>> 2. Yes I am planning to rewrite a project using Lucene 2.3.2. So, is  
>> the
>> next version heading straight to 3.0 ??? (Sorry, if this question  
>> seems to
>> be a little out of context of the current thread)
> 
> The current plan is to have a 2.4 release next, then a 2.9 release and  
> finally 3.0.  It's spelled out a bit here:
> 
>      http://wiki.apache.org/lucene-java/Java_1.5_Migration
> 
> But there are no dates attached to those bullets!
> 
> Mike
> 
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> 
> 

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