The document discusses running Apache Kafka across multiple datacenters and provides guidance on how to configure Kafka for disaster recovery in a multi-datacenter setup. It recommends having separate Kafka clusters in each datacenter rather than a single cluster spanning datacenters, due to high replication latency over long-distance links. It also outlines three ways to prepare for disaster recovery: running in separate clusters per datacenter, using Kafka MirrorMaker to replicate topics between clusters, and using a shared storage system.