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From "Uwe Schindler" <>
Subject RE: Upgrade solr
Date Fri, 09 Sep 2011 07:04:45 GMT
Hi SN,

The latest stable Solr release is Solr 3.3, with 3.4 coming this month. Solr
4.0 and Lucene 4.0 are both not yet stable, as we are still changing APIs
and optimizing things like the index format, algorithms. You can use Solr
4.0 snapshot, if you really need the new features and report back what you
find out. But you need to know, that we might change index formats from one
day to the other, so after an upgrade to a later trunk version, your indexes
may no longer be readable and throw scary Exceptions when reading indexes.
Upgrading 3.x index formats to 4.0 unstable is always possible, just not
4.0-old to 4.0-new, so be prepared to reindex your stuff after upgrade.
Otherwise, Lucene/Solr 4.0 seems quite stable if you don't upgrade.

The Solr version Lucid Imagination ships with LucidWorks, also uses the
"unstable" 4.0 version internally, but they guarantee, that you can upgrade
between different LucidWorks versions (they provide an index upgrade tool).

About the Geo features: I am not familiar with the current status of Solr's
Geo support. Maybe somebody else can answer, if the mentioned query type
works with the stable version 3.x.


Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen

> -----Original Message-----
> From: solrnovice []
> Sent: Friday, September 09, 2011 5:21 AM
> To:
> Subject: RE: Upgrade solr
> hi Uwe, i havent heard from Lucid, so can you please let me know what is
> latest stable version of SOLR. On apache's site its mentioned that SOLR
4.0 is
> not ready, but the nightly build is available ( but i dont know how stable
> version is ) . I want to make the geodist work, but with a stable release.
> like the geodist doesnt work in prior release of solr.
> When i mean, it doesnt work, i mean returning as a pseudo column, even if
i do
> not perform a longitude / latitude query.
> I had the geodist returned when i did a City search by using SOLR4
> from the nightly build. What is the latest Release candidate for SOLR. Can
> please point me to the right download site?
> thanks
> SN
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