Short form: It's always best to re-index if possible.
1> Should work, indexes are supposed to be backwards-compatible
across one release. But I'd still re-index if possible. WARNING:
as you add documents etc. when, say, a merge happens, the
newly merged segments will NOT be readable by a 1.4.1 Solr.
2> SolrJ still works. You should, of course, recompile your program
against the new libraries
3> I'd be cautious about this. Look at the CHANGES.txt files, there's
usually a a set of upgrade notes for each release. Look particularly
in solr/README.txt and lucene/README.txt
Best
Erick
On Wed, Jan 11, 2012 at 12:21 PM, ahammad <ahmed.ham...@gmail.com> wrote:
> I was doing some reading on the new features and whatnot, and I am interested
> in upgrading. I have a few questions though:
>
> 1) The index seemed to have changed, can I reuse the current index or should
> I reindex the data? I read some things about optimizing the index and
> whatnot, but I am not clear on that.
> 2) Will SolrJ still work?
> 3) Has there been any changes in the config files or the schema files such
> that my existing files won't work, or can I simply reuse them?
>
> Thank you.
>
> --
> View this message in context:
> http://lucene.472066.n3.nabble.com/Upgrading-from-1-4-to-the-latest-version-tp3651234p3651234.html
> Sent from the Solr - User mailing list archive at Nabble.com.
