Reducing cross-region image pull costs
WHAT IT TESTS: registry topology for multi-region pulls. OUTLINE: a per-region pull-through cache or geo-replicated registry serves pulls locally, cutting latency and egress, traded against consistency lag, storage cost, and cache management.
WHAT IT TESTS: whether you can place image content close to clusters and reason about the trade-offs. ANSWER OUTLINE: deploy a pull-through cache mirror in each region that fetches once from upstream and serves subsequent pulls locally, or use a geo-replicated registry that pushes content to regional endpoints. Both cut pull latency and cross-region egress. Discuss trade-offs: cache cold misses, replication lag and eventual consistency, extra storage cost, eviction policy, and authentication propagation.
Read the original → interview
- #kubernetes
- #registry
- #multi-region
- #caching
- #cost-optimization
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