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Message-ID: <85d3c3b60812011726t6c05b274t1f6b98043d93b7e4@mail.gmail.com>
Date: Mon, 1 Dec 2008 17:26:05 -0800
From: "Jason Rutherglen" <jason.rutherglen@gmail.com>
To: java-user@lucene.apache.org
Subject: Re: Which is faster/better
In-Reply-To: <4E7EDEA6-A3C7-4381-8825-6492D059D1AD@mikemccandless.com>
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References: <492B92B2.9010006@teamware.com>
	 <E286E1BC-7828-4FE6-AFB7-CFBEB3F04BAD@mikemccandless.com>
	 <492C7C6E.7070501@teamware.com>
	 <111001c9536e$2673efd0$330bc30a@sv.us.sonicwall.com>
	 <4E7EDEA6-A3C7-4381-8825-6492D059D1AD@mikemccandless.com>

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It would be nice to have a pluggable solution for deleteddocs in IndexReader
that accepts a Filter, and have BitVector implement Filter.  This way I do
not have to implement IndexReader.clone.

On Mon, Dec 1, 2008 at 5:04 PM, Michael McCandless <
lucene@mikemccandless.com> wrote:

>
> So in your UI, you'd like the delete to happen immediately and then it's OK
> if the updated (added) document then takes a minute to appear?
>
> OK, I agree this (the immediacy of doing deletes via IndexReader) is a good
> reason to keep IndexReader.deleteDocument for now.
>
> Mike
>
>
> Ganesh wrote:
>
>  I have to Tag a document based on User request. On deletion, I should do
>> 'marked for delete' and on document state change, i need to update the
>> document.
>> Update internally does delete and add. I am commiting the writer and
>> re-opening the reader, every minute.
>>
>> Consider, In a minute, lets say User has deleted a document from the UI.
>> If i use IndexWriter, then it is updating the document. but it is getting
>> refreshed only after a minute. If User refreshes his page, then he could see
>> the deleted item again.
>>
>> In order to avoid this situitation, i need to plan
>> 1. Delete the document using reader
>> 2. Add the document with new state using Writer.
>>
>> I think, we can't avoid using DeleteDocument of Reader. Suggest me, if
>> there is any other way.
>>
>> Regards
>> Ganesh
>>
>>
>> ----- Original Message ----- From: "Antony Bowesman" <adb@teamware.com>
>> To: <java-user@lucene.apache.org>
>> Sent: Wednesday, November 26, 2008 4:00 AM
>> Subject: Re: Which is faster/better
>>
>>
>>  Michael McCandless wrote:
>>>
>>>>
>>>> If you have nothing open already, and all you want to do is delete
>>>> certain documents and make a commit point, then using IndexReader vs
>>>> IndexWriter should show very little difference in speed.
>>>>
>>>
>>> Thanks.  This use case can assume there may be nothing open.  I prefer
>>> IndexWriter as delete=write is a much clearer concept that delete=read...
>>>
>>>  As of 2.4, IndexWriter now provides delete-by-Query, which I think
>>>> ought to meet nearly all of the cases where someone wants to
>>>> delete-by-docID using IndexReader.
>>>>
>>>
>>> Yes, that is an excellent addition.  Up to now, our only use case for
>>> delete-by-docId is to perform a dBQ and so far, we have been using your
>>> suggestion from last year about how to do delete documents for ALL terms.
>>>
>>> Antony
>>>
>>>
>>>
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