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Date: Tue, 20 Nov 2012 16:01:51 +0530
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Subject: Re: Using Lucene 2.3 indices with Lucene 4.0
From: Ramprakash Ramamoorthy <youngestachiever@gmail.com>
To: java-user@lucene.apache.org
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On Tue, Nov 20, 2012 at 3:54 PM, Danil =C5=A2ORIN <torindan@gmail.com> wrot=
e:

> However behavior of some analyzers changed.
>
> So even after upgrade the old index is readable with 4.0, it doesn't mean
> everything still works as before.
>

Thank you Torin, I am using the standard analyzer only and both the systems
use Unicode 4.0 and I don't smell any problems here.

>
> On Tue, Nov 20, 2012 at 12:20 PM, Ian Lea <ian.lea@gmail.com> wrote:
>
> > You can upgrade the indexes with org.apache.lucene.index.IndexUpgrader.
> >  You'll need to do it in steps, from 2.x to 3.x to 4.x, but should work
> > fine as far as I know.
> >
> >
> > --
> > Ian.
> >
>
Thank you Ian, this is giving me some head starts.

> >
> >
> > On Tue, Nov 20, 2012 at 10:16 AM, Ramprakash Ramamoorthy <
> > youngestachiever@gmail.com> wrote:
> >
> > > I understand lucene 2.x indexes are not compatible with the latest
> > version
> > > of lucene 4.0. However we have all our indexes indexed with lucene 2.=
3.
> > >
> > > Now that we are planning to migrate to Lucene 4.0, is there any work
> > > around/hack I can do, so that I can still read the 2.3 indices? Or is
> > > forgoing the older indices the only option?
> > >
> > > P.S : Am afraid, Re-indexing is not feasible.
> > >
> > > --
> > > With Thanks and Regards,
> > > Ramprakash Ramamoorthy,
> > > Chennai,
> > > India.
> > >
> >
>


--=20
With Thanks and Regards,
Ramprakash Ramamoorthy,
Engineer Trainee,
Zoho Corporation.
+91 9626975420

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