default — varies by working-set size + access pattern
spec default — measure on your training workload
modeled — pilot to validate
default — depends on read pattern + dataset shape
I/O wait deltas default to 4.0% / 0.8% per spec §4.2 — validate against live customer telemetry before externalizing.
▶Tier comparisonPer-tier load time, GPU productivity, and net ROI — derived from Configure pipeline sizes
Standard 50 Gbps
Reframe ROI — goodput · stall · flash displacement vs premium, by throughput level
Capability column shows what fraction of the cluster's read demand each throughput level can serve (cluster GPUs × 1 Gbps/GPU). Goodput & Flash are prorated by capability; Stall scales with bandwidth directly.
THROUGHPUT
STORAGE RATE
CAPABILITY
GOODPUT
STALL
FLASH $
PREMIUM
NET ROI/MO
Net ROI = goodput + stall + flash displacement − tier premium vs Standard. Drives Configure → Cluster size / GPU $/hr / Checkpoint cadence / Hot working set. Active tier highlighted in cyan.
Watch the goodput math execute against a real B2 bucket
Click to start. Hero tiles fill in as each stage finishes.
Estimate only — not a quote. Figures shown here are projections derived from the inputs you've configured and Backblaze list pricing on the date of this session. Actual results depend on your specific workload, cluster utilization, contracted rates, and implementation. This dashboard is for discussion purposes and does not constitute a sales quote, pricing commitment, service-level agreement, or warranty. The I/O wait and flash-replacement defaults are working defaults pending pilot validation — instrument your own cluster and override the Configure fields before relying on these numbers for budget decisions. Final terms require a signed agreement.