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Cedana Editorial

Engineering notes and field reports from the Cedana team.
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Blueprint timeline of two jobs crossing a 24-hour wall-time boundary: one is terminated and restarts from zero, the other checkpoints and continues into the next allocationBlueprint timeline of two jobs crossing a 24-hour wall-time boundary: one is terminated and restarts from zero, the other checkpoints and continues into the next allocation
Aug 12, 2026

The Wall-Time Limit forces an expensive tradeoff in HPC.

Jobs reach their wall-time limits and lose hours or days of in-memory progress. However, the limit itself is not the problem.

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Blueprint roofline plot: performance rises along the memory-bandwidth slope to a ridge point, then flattens at the compute ceilingBlueprint roofline plot: performance rises along the memory-bandwidth slope to a ridge point, then flattens at the compute ceiling
Jul 29, 2026

Roofline Analysis and the Inference Value Chain

Once you stop renting intelligence, you own performance.

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Blueprint schematic of an eight-GPU node accumulating session state, with a state gauge rising toward the VRAM capacity lineBlueprint schematic of an eight-GPU node accumulating session state, with a state gauge rising toward the VRAM capacity line
Jul 14, 2026

The Era of Stateful Inference: how to improve cost per token.

We are entering the stateful inference era, driven by frontier models with longer context windows, longer in-flight sessions, and single instances spanning 8, 16, or more GPUs.

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Blueprint fleet of GPU cells with only a third lit, next to a utilization gauge stuck at a dashed 30 percent ceiling and a second gauge breaking through itBlueprint fleet of GPU cells with only a third lit, next to a utilization gauge stuck at a dashed 30 percent ceiling and a second gauge breaking through it
Nov 12, 2025

The Utilization Ceiling: Why AI and HPC Schedulers Hit 30% and How to Fix This

GPU utilization across AI and HPC workloads is fundamentally capped at 30% because schedulers cannot migrate running jobs. Cedana's CPU and GPU migration capability surpasses this limitation, unlocking near-full utilization.

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Blueprint of live migration: a dashed reclaimed spot instance, an accent state block in flight, and a healthy instance holding the restored stateBlueprint of live migration: a dashed reclaimed spot instance, an accent state block in flight, and a healthy instance holding the restored state
Nov 2, 2024

Using Cedana to Live-Migrate Stateful Workloads Between Spot Instances

Save, migrate and resume a running XGBoost workload in six steps.

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