Hi,
I need to upgrade our Solr installation from 1.4.1 to the latest 4.1.0
version. The question is how to deal with indexes. AFAIU there are two
things to be aware of: file format and index format (excuse me for
possible term mismatch, I'm new to Solr) - and while file format can
(and will automatically?) be updated if old index files are used by new
Solr installation, one cannot say the same about index format. Is it true?
And if the above is true then the question is - should this "index
format" be updated at all - i.e. if we can happily live with it then
it's fine, but I guess that this decision will not bring
performance/feature improvements that were introduced since 1.4.1
version, will it?
Assuming we do need to update this "index format", how to do it? I found
solution on SO
(http://stackoverflow.com/questions/4528063/moving-data-from-solr-1-5-to-solr-4-0)
that includes usage of some "export to XML" feature, maybe with Luke,
some custom-made XSLT transformation and import back. Seems like a lot
to do - although it's quite understandable. However, this answer was
given in 2010 with Solr 4.0 being in pre-alpha - so maybe there are now
tools for this now?
--
Warm regards,
Artem Karpenko
