Hi, If you keep the old schema and solrconfig, you should be able to simply upgrade your solr.war. Solr 3.5 will read the old index format and write the new one. Once you've upgraded the index will not be readable by 1.4.1. Test this on a test environment to verify.
-- Jan Høydahl, search solution architect Cominvent AS - www.cominvent.com Solr Training - www.solrtraining.com On 13. feb. 2012, at 09:01, Bhavnik Gajjar wrote: > One thought... If your old (1.4.1) Solr index has all fields are 'stored' > (stored="true" in schema.xml for field), then you can easily create a > migration tool which would pick the data from 1.4.1 Solr instances and put > it into 3.5.0. > > > Bhavnik > > On 2/13/2012 12:42 PM, Kashif Khan wrote: > > Do we need to reindex solr data which was indexed using solr 1.4.1 in order > to upgrade it to solr 3.5.0? Because indexing is really a huge costly > process in our case because the data generated needs some calculations which > takes lot of time. Else otherwise if there is any other tool which can > update lucene indexes all by itself please do let me know. > > Kashif Khan > > -- > View this message in context: > http://lucene.472066.n3.nabble.com/Do-we-need-reindexing-from-solr-1-4-1-to-3-5-0-tp3739353p3739353.html > Sent from the Solr - User mailing list archive at Nabble.com.
