Authors: Gyuho Lee (Amazon Web Services, @gyuho), Jingyi Hu (Google, @jingyih) etcd 3.4 focuses on stability, performance and ease of operation, with features like pre-vote and non-voting member and improvements to storage backend and client balancer. Please see CHANGELOG for full lists of changes. Better Storage Backend etcd v3.4 includes a number of performance improvements for large scale Kubernetes workloads. In particular, etcd experienced performance issues with a large number of concurrent read transactions even when there is no write (e.
Source: Announcing etcd 3.4