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From Lance Norskog <>
Subject Re: Is solr 4.0 ready for prime time? (or other ways to use geo distance in search)
Date Sat, 22 Jan 2011 04:53:45 GMT
The Solr 4 branch is nowhere near ready for prime time. For example,
within the past week code was added that forces you to completely
reindex all of the documents you had. Solr 4 is really the "trunk".
The low-level stuff is being massively changed to allow very big
performance improvements and new features.

Solr 3.x is intended as a "stable" version: bug fixes, not much
mutation, ports of features that are proofed out on the trunk. It is
good enough for production use.

On Fri, Jan 21, 2011 at 1:37 PM, Markus Jelsma
<> wrote:
> Hi,
> You can use Solr 1.4.1 and a third party plugin [1]. It does a pretty good job
> in spatial search. You could also try the Solr 3.1 branch which also has some
> spatial features on-board. It, however, does not return computed distances but
> can filter and sort using the great circle algorithm or a bounding box and also
> covers the problem of the poles.
> I would migrate to the 3.1 branch first and see how 4.0 behaves when it is
> being released and got a few bugfix updates.
> [1]:
> Cheers,
>> Hi all,
>>      I've been using solr 1.4 and it's working great for what I'm
>> doing.  However, I'm now finding a need to filter results by location.
>> Searching around, I see that the distance functions are implemented in
>> solr 4.0, but there's no full release yet.
>> So my question is, is solr 4.0-dev ready to be used in prime time?  My
>> other option would appear to be using the cartesian distance, which
>> isn't totally accurate, but it probably good enough for my purposes.
>> Something like including this in my filter query:
>> sum(pow(sub(input_latitiude,stored_latitude),2),pow(sub(input_longitude,sto
>> red_longitude),2))<degrees distance filter
>> What's anyone else out there using?
>> Thanks in advance,
>> Alex

Lance Norskog

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