16Follow one log line from the application into Elasticsearch and onto the Kibana screen. Where does this path break at scale?▼mediumAmazon & AWSFlipkartJPMorgan ChaseunlockedThe data-path question separates people who have sized a cluster from people who installed one. Shard sizing, refresh versus flush, and each ILM phase carry one specific failure mode apiece.Open full answer →
20Postgres is out of headroom. How do you choose a shard key, and how do you reshard later without downtime?▼hard★ EssentialPhonePeFlipkartUber○ sign inSharding buys write headroom and bills you in joins, foreign keys, and every future migration. The key choice is a query-pattern bet; the resharding choreography separates operators from diagram artists.Open full answer →
