Professional Cloud Architect – Google Cloud Certification Guide

Data consistency

One important aspect to understand is that Bigtable is eventually consistent by default, meaning that when we write a change to one of our clusters, we will be able to read that change from other clusters, but only after replication has taken place. To overcome this constraint, we can enable Read-Your-Writes consistency when we have replication enabled. This will ensure that an application won't read data that's older than the most recent writes. To achieve Read-Your-Writes consistency for a group of applications, we should use the single-cluster routing policy in our app profiles in order to route requests to the same cluster. The downside to this, however, means that if a cluster becomes unavailable, then we need to perform ...