51Three replicas of one service landed on the same node and one reboot killed them all. How do affinity and anti-affinity actually work?▼mediumNewFlipkartNetflixPhonePe◆ premiumHard versus soft rules, topology keys, weights that lose to everything else, and the IgnoredDuringExecution half nobody remembers. Placement shapes blast radius only when paired with disruption budgets.Open full answer →
07Training throughput is 40 percent below what the GPU count predicts. The GPUs look fine. Where do you look?▼expertNewNVIDIAMetaMicrosoft2 repliesunlockedAt sixteen GPUs and above, the network is the computer. Collectives run at the speed of the worst link in the group, and placement decides which link that is.Open full answer →
