On 12/14/2017 2:27 PM, Drooy Drooy wrote: > We have an in-house project running in Solr 4.7 with Master/Slave mode for > a few years, what is it going to take to upgrade it to SolrCloud with > TLOG/PULL replica mode ? > > I read the upgrade guides, none of them talking about the jump from 4.x to > 7.
I would strongly recommend that you treat the new version as an entirely new deployment, not as something you're going to upgrade. Build new collections with configs designed from 7.x examples and reindex completely from scratch. Many configs that people are using with version 4 were actually designed for earlier versions and contain things that won't even work with 5.x, let alone 7.x. Even if you have a config built specifically for 4.x, it is still likely that it's not going to work at all in 7.x without at least some minimal updates. The number of changes you're probably going to WANT (in addition to those that you NEED) will probably make your config incompatible with your existing index data. It is extremely likely that you will need to reindex at some point. Three major versions is an *enormous* change to how Solr works. Just in case you might need it, here's a wiki page about reindexing. You may already be aware of what that means: https://wiki.apache.org/solr/HowToReindex Thanks, Shawn
