https://gitenterprise.me/2017/10/10/gerrit-user-summit-gerrit-at-google/
Gerrit at Google, gives insights into Google's architecture and provides some metrics on scale. In addition, it presents findings from the recent switch of our load-balancing infrastructure and highlights pitfalls we encountered.
Gerrit at Google
Multi-master/-tenant setup
Replication
Housing large projects like Android and Chromium
Some metrics on scale
Outages and root-causes
Load-balancing Git/Gerrit Traffic at Google
Sharding of hosts, projects and repositories across hundreds of serving tasks
Optimizing different caches
Load-balancing decisions and their impact on latency
What garbage collection means for load-balancing and vice-versa