15.2. Challenges for Multi-Site Clusters
Typically, multi-site environments are too far apart to support synchronous communication between the sites and synchronous data replication. That leads to the following challenges:
How to make sure that a cluster site is up and running?
How to make sure that resources are only started once?
How to make sure that quorum can be reached between the different sites and a split brain scenario can be avoided?
How to manage failover between the sites?
How to deal with high latency in case of resources that need to be stopped?
In the following sections, learn how to meet these challenges.