The cutover is the easy part
A field guide to online resharding, reconstructed from thirteen production accounts (Notion, Figma, Slack, GitHub, Shopify, Discord, Etsy, Pinterest, Stripe, Adyen, Mercari, Monzo, AWS) and six published incid…
What surprised meNo published postmortem in this corpus blames the cutover, the step every team rehearses and fears. The incidents come from the shard key chosen nine…