Hi,
we are planning to update Solr installations from 4.0 to 4.3 and want to
avoid reindexing. But solrconfig.xml contains the following comment for
<luceneMatchVersion>:
"... Generally, you want to use the latest version to get all bug fixes
and improvements. It is highly recommended that you fully re-index after
changing this setting ..."
What bug fixes / improvements do we loose if we'd stay at
<luceneMatchVersion>LUCENE_40</luceneMatchVersion>?
Or is it safe to change it from LUCENE_40 to LUCENE_43 without reindexing?
The release notes do no mention index format incompatibilites. However,
the compression of stored fields introduced in 4.1 is definitely an
index change. Is it correct that Solr 4.3 can still read a Solr 4.0 index?
I would think that it is not possible for Solr 4.0 to read an index from
Solr 4.3, right? This is important to know - just in case an update from
4.0 to 4.3 needs to be rolled back.
Thank you,
Andreas
