SOLRizing advice?

[Paul Libbrecht <pa...@activemath.org>]

Hello list,

I am surely not the only one who wishes to migrate from bare lucene to  
solr.
Many different reasons can be there, e.g. facetting, web- 
externalization, ease of update... what interests me here are the  
steps needed in the form of advice as to what to use.

Here's a few hints. I would love a web-page grouping all these:

- first change references to indexwriter/indexreader/indexsearch to be  
those of SOLR using embedded-solr-server

- make a first solr schema with appropriate analyzers by defining  
particular dynamic fields

- slowly replace the queries methods with solr queries, slowly taking  
advantage of solr features

- web-expose the solr core for at least admin by merging the web.xml

Does such a web-page already exist?

thanks in advance

paul

Re: SOLRizing advice?

[Noble Paul നോബിള്‍ नोब्ळ् <no...@gmail.com>]

It is a very uncommon usecase to "slowly" migrate from lucene to Solr.
I somehow feel that the piecemeal migration is going to be more
expensive than the whole migration .

happy hacking...
--Noble

On Mon, Apr 27, 2009 at 10:05 AM, Paul Libbrecht <pa...@activemath.org> wrote:
>
> Hello list,
>
> I am surely not the only one who wishes to migrate from bare lucene to solr.
> Many different reasons can be there, e.g. facetting, web-externalization,
> ease of update... what interests me here are the steps needed in the form of
> advice as to what to use.
>
> Here's a few hints. I would love a web-page grouping all these:
>
> - first change references to indexwriter/indexreader/indexsearch to be those
> of SOLR using embedded-solr-server
>
> - make a first solr schema with appropriate analyzers by defining particular
> dynamic fields
>
> - slowly replace the queries methods with solr queries, slowly taking
> advantage of solr features
>
> - web-expose the solr core for at least admin by merging the web.xml
>
> Does such a web-page already exist?
>
> thanks in advance
>
> paul



-- 
--Noble Paul

Re: SOLRizing advice?

[Otis Gospodnetic <ot...@yahoo.com>]

My turn to help, Paul.

There is no such page on the Solr Wiki, but I agree with Paul, this can really be a quick and painless migration for typical Lucene/Solr setups.  This is roughly how I'd do things:

- I'd set up Solr
- I'd create the schema.xml mimicking the fields in the existing Lucene index
- I'd copy over the Lucene index, keeping in mind Lucene jar versions, Solr/Lucene jar versions, and index compatibility
- Start Solr
- Go to Admin page and run test queries
- Go to schema/solrconfig.xml and add various other things - proper cache sizes, index replication, dismax, spellchecker, etc.

- Go to Lucene-based indexer classes and change them to use Solrj
- Go to Lucene-based searcher classes and change them to use Solrj

I'd leave embedded Solr and dynamic fields for phase 2 of the migration, unless those things really are necessary.
I don't think you'd need to do anything with web.xml - solr comes as a webapp, packaged in a way, which contains its own web.xml

Otis
--
Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch



----- Original Message ----
> From: Paul Libbrecht <pa...@activemath.org>
> To: solr-user@lucene.apache.org
> Sent: Monday, April 27, 2009 12:35:59 AM
> Subject: SOLRizing advice?
> 
> 
> Hello list,
> 
> I am surely not the only one who wishes to migrate from bare lucene to solr.
> Many different reasons can be there, e.g. facetting, web-externalization, ease 
> of update... what interests me here are the steps needed in the form of advice 
> as to what to use.
> 
> Here's a few hints. I would love a web-page grouping all these:
> 
> - first change references to indexwriter/indexreader/indexsearch to be those of 
> SOLR using embedded-solr-server
> 
> - make a first solr schema with appropriate analyzers by defining particular 
> dynamic fields
> 
> - slowly replace the queries methods with solr queries, slowly taking advantage 
> of solr features
> 
> - web-expose the solr core for at least admin by merging the web.xml
> 
> Does such a web-page already exist?
> 
> thanks in advance
> 
> paul