Two ways to move a live Valkey cache: proxy cutover vs operator cutover
AWS shipped zero-downtime migration into ElastiCache Serverless for Valkey. Under the hood it is PSYNC plus a proxy that flips per shard. We ship PSYNC without the proxy. Here is what each one gives up, and the two things I'm fixing in ours because their docs made me notice.
Kristiyan Ivanov•