Hi Folks – Few questions before I tackled an upgrade here. Looking to go from 7.4 to 7.7.2 to take advantage of the improved Tiered Merge Policy and segment cleanup – we are dealing with some high (45%) deleted doc counts in a few cores. Would simply upgrading Solr and setting the cores to use Lucene 7.7.2 take advantage of these features? Would I need to reindex to get existing segments merged more efficiently? Does it depend on the size of my current segments vs the configuration of the merge policy or would upgrading simply allow solr to do its own thing help mitigate this issue?
Also – I noticed the 7.5+ defaults to the Autoscaling for replication, and 8.0 defaults to legacy. Would I potentially need to make changes to my existing configs to ensure they stay on Legacy replication? Thanks much! TZ
