I just updated a staging collection from a replication factor of 2 to 3. Collections with replication
favor of 2 were a complication with all this crashing solr staging stuff. I recommend everyone do
this if your team has collections with replication factor 2. It's pretty straightforward, you can add
a shard in the UI and you can use this curl command to update the value of the replication factor:
(updating to post 8.4 docs, but the command is the same in this case)
https://solr.apache.org/guide/8_4/collection-management.html#modifycollection
...
In the new staging solr cluster it looks like dss, pdc-discovery, and special collections have 2 shards.
Anna recommended that we update our Solr to have replication factor of 3 instead of 2 (see slack https://pulibrary.slack.com/archives/CL8F616KV/p1711034808609289)
Our solr_cloud_helper.rb is currently hardcoded to 2: https://github.com/pulibrary/pdc_discovery/blob/main/lib/traject/solr_cloud_helper.rb#L113