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From Michael McCandless <luc...@mikemccandless.com>
Subject Re: 2 phase commit with external data
Date Fri, 06 Nov 2009 16:40:45 GMT
It will always return a reader reflecting every change done with that
writer (plus, the index as it was when the writer was opened) before
getReader was called.

It's unaffected by the call to prepareCommit.

Mike

On Fri, Nov 6, 2009 at 11:35 AM, Peter Keegan <peterlkeegan@gmail.com> wrote:
> Which version of the index will IndexWriter.getReader() return if there have
> been updates, but no call to 'prepareCommit'?
>
>
> On Fri, Nov 6, 2009 at 11:33 AM, Michael McCandless <
> lucene@mikemccandless.com> wrote:
>
>> On Fri, Nov 6, 2009 at 11:22 AM, Peter Keegan <peterlkeegan@gmail.com>
>> wrote:
>> >>Can you use IndexWriter.getReader() to get the reader for step 2
>> > Yes - perfect! I didn't think that would be different than refreshing or
>> > recreating an IndexReader.
>>
>> Great!
>>
>> getReader() searches the full index, plus uncommitted changes.
>>
>> > I don't need to keep the old commit alive. The goal is to keep the
>> external
>> > file in synch with the index, so a separate searcher process will see
>> > consistent data. By postponing both commits, the window where they are
>> out
>> > of synch is very small (2 file renames). I record the Lucene index
>> version
>> > in the external file for checking synchcronization.
>>
>> OK.
>>
>> Mike
>>
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