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Cloudflare R2 jitters starve H100s
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REDDIT · REDDIT// 2d agoINFRASTRUCTURE

Cloudflare R2 jitters starve H100s

A Machine Learning subreddit post says Cloudflare R2’s zero-egress pitch breaks down under AI training load because TTFB jitter leaves H100s waiting on I/O. The poster wants an S3-compatible store that can stream 40TB-scale datasets without forcing a custom NVMe cache layer.

// ANALYSIS

The sharp take: zero egress is not the same as training-ready storage. For GPU-heavy workloads, predictable latency and locality matter more than headline storage pricing.

  • The post highlights a common infra trap: object storage that is cheap on paper can still waste expensive GPU time if read latency is noisy.
  • Alternatives like Wasabi and Backblaze B2 can remove egress fees too, but they come with their own pricing or policy tradeoffs, so “free egress” is not a complete answer.
  • At 40TB scale, the likely winning pattern is regional replication plus a local cache tier, not direct-from-object-store streaming as the only data path.
  • This is less a Cloudflare-specific complaint than a reminder that AI training pipelines need storage engineered for throughput consistency, not just S3 compatibility.
// TAGS
cloudgpudata-toolsmlopscloudflare-r2

DISCOVERED

2d ago

2026-04-09

PUBLISHED

3d ago

2026-04-09

RELEVANCE

7/ 10

AUTHOR

regentwells