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From Otis Gospodnetic <otis.gospodne...@gmail.com>
Subject Re: Upgrading from 3.6 to 4.0
Date Thu, 03 Jan 2013 04:26:28 GMT
Hi Roy,

Unless your servers are maxed out, I'd do with:

1. Set up Solr 4.0 on the same servers... or just 1 (additional even)
2. Reindex to Solr 4.0 or use SolrEntityProcessor if all fields from 3.6
index are stored
3. Add the super secret, for your eyes only 21st client with Solr 3.6 and
point it to the Solr 4.0 index.

I'd put my money on "Solr 3.6 client will work with Solr 4.0".
And yes, Solr 4.0 should be able to read Solr 3.6.* indices.

Otis
--
Solr & ElasticSearch Support
http://sematext.com/





On Wed, Jan 2, 2013 at 1:34 PM, Benjamin, Roy <rbenjamin@ebay.com> wrote:

> Thanks all,
>
> >> You should not use a a 3.6 SolrJ client with Solr 4 server.
>
> I run 100 shards and 20 clients. If above is correct then the entire
> system must be shut down for many hours for an upgrade...
>
> Thanks
> Roy
>
> -----Original Message-----
> From: Tomás Fernández Löbbe [mailto:tomasflobbe@gmail.com]
> Sent: Wednesday, January 02, 2013 10:23 AM
> To: solr-user@lucene.apache.org
> Subject: Re: Upgrading from 3.6 to 4.0
>
> AFAIK Solr 4 should be able to read Solr 3.6 indexes. Soon those files
> will be updated to 4.0 format and will not be readable by Solr 3.6 anymore.
> See http://wiki.apache.org/lucene-java/BackwardsCompatibility
> You should not use a a 3.6 SolrJ client with Solr 4 server.
>
> Tomás
>
>
> On Wed, Jan 2, 2013 at 3:04 PM, Benjamin, Roy <rbenjamin@ebay.com> wrote:
>
> > Will the existing 3.6 indexes work with 4.0 binary ?
> >
> > Will 3.6 solrJ clients work with 4.0 servers ?
> >
> >
> > Thanks
> > Roy
> >
>

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