Tagged etcd

2 posts.

• After the NVMe: what the fixes bought, and what the rolling restart cost25 Sept 2026

  A follow-up on the cluster whose etcd shared one consumer drive with every storage replica. Flush latency fell from 23 ms to 3 ms, a filtered copy shrank a 9.9 GB SQLite database to 3.8 GB in ten minutes, and turning on discard cost more in replica rebuilds than in reboots.

• Three etcd members, one consumer NVMe23 Sept 2026

  A scale-down that never happened led me to leader elections lost on every node, and from there to a single drive holding every etcd member and every storage replica. Three replicas on one disk mostly just triple the writes.