https://nanta-data.dev/en/tags/karpenter/Recent content in Karpenter on nanta - Data EngineeringHugo -- gohugo.ioen© 2026 nantaMon, 09 Mar 2026 00:00:00 +0000https://nanta-data.dev/en/posts/ec2-instance-architecture-comparison/Mon, 09 Mar 2026 00:00:00 +0000https://nanta-data.dev/en/posts/ec2-instance-architecture-comparison/In the 2026 cloud VM benchmarks, AMD EPYC Turin (C8a) dominated both single-threaded and multi-threaded performance. Should we migrate our Graviton (ARM) data platform infrastructure to C8a? After analyzing the vCPU vs physical core distinction, Spot price-to-core efficiency, and workload characteristics — the conclusion is that a hybrid strategy beats a full migration.https://nanta-data.dev/en/posts/eks-ai-platform-cost-saving/Thu, 05 Mar 2026 00:00:00 +0000https://nanta-data.dev/en/posts/eks-ai-platform-cost-saving/An AI platform team’s serving API was running 500 fixed pods on only two on-demand instance types (c6i.2xlarge, m6i.2xlarge). We applied instance type diversification and Karpenter consolidation as phase 1, then KEDA cron-trigger scheduled scaling as phase 2. Key finding: consolidation alone has limited effect when pod count is fixed — it needs scale-in to actually reduce node count.https://nanta-data.dev/en/posts/trino-gateway-zero-downtime/Fri, 27 Feb 2026 00:00:00 +0000https://nanta-data.dev/en/posts/trino-gateway-zero-downtime/Trino doesn’t support coordinator HA. Redeploying the coordinator means downtime. We adopted Trino Gateway to enable Blue/Green deployments with zero downtime and route BI/OLAP queries to separate clusters based on HTTP headers.