Hello.
This email is about the presentation at https://www.slideshare.net/shalinmangar/cross-datacenter- replication-in-apache-solr-6 On slides 6, 7 and 8, there are 3 anti-patterns. It seems there are many interpretations. Interpretation 1: - On slide 6 and 7: Only 2 DC used, so the ZK quorum will not survive and recover after 1 DC failure - On slide 8: We have 3 DCs which OK for ZK. But we have 6 ZK nodes. This is a problem because ZK likes 3, 5, 7 ... odd nodes. - Those rules are dictated by zookeeper and will apply when using any system that rely on zookeeper such as Hadoop, Kafka, HBase, etc Interpretation 2: Any SolrCloud deployment with "Remote SolrCloud nodes" i.e. solrCloud not in same DC as ZK is deemed an anti-pattern (note that DCs can be just a couple of miles apart and could be connected by high speed network) There are many more interpretations. It would be interesting to know the correct interpretation. Thank you very much. Arcadius.
