What to do with Lucene Version parameter on upgrade

["Becker, Thomas" <Th...@netapp.com>]

I'm relatively new to Lucene and am in the process of upgrading from 4.0 to 4.3.1.  I'm trying to figure out if I need to leave my version at LUCENE_40 or if it is safe to change it to LUCENE_43.  Does this parameter directly determine the index format?  I have some existing indexes from 4.0 but am fine with whatever changes Lucene makes to them; I'm not concerned with the internal format.  But if I set my version to LUCENE_43 will the IndexReader/Writer not work with my old indexes?

Regards,
Tommy

Re: What to do with Lucene Version parameter on upgrade

[Ian Lea <ia...@gmail.com>]

Version relates to analyzers and the like rather than to internals
such as index format. I don't recall what exactly has changed between
4.0 and 4.3.1 but you're probably safe to change it and use LUCENE_43.

Take a look at the javadoc for StandardAnalyzer - that lists some
versions and what changed with that version.


--
Ian.


On Thu, Jun 20, 2013 at 12:55 PM, Becker, Thomas
<Th...@netapp.com> wrote:
> I'm relatively new to Lucene and am in the process of upgrading from 4.0 to 4.3.1.  I'm trying to figure out if I need to leave my version at LUCENE_40 or if it is safe to change it to LUCENE_43.  Does this parameter directly determine the index format?  I have some existing indexes from 4.0 but am fine with whatever changes Lucene makes to them; I'm not concerned with the internal format.  But if I set my version to LUCENE_43 will the IndexReader/Writer not work with my old indexes?
>
> Regards,
> Tommy

---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-user-help@lucene.apache.org