Cold Archive Consolidation

Running

s3://laminar-archive-use1 → s3://laminar-archive-euc1 · S3 → S3 (cross-region) · 1 datasets · running for 10h 12m

Migration progress

34.8%3.34 TB of 9.61 TB

ETA 59m at current rate

Consistency: Immutable objects (no tail required)

Current throughput

1,848 MB/s

Est. safe capacity

2,100 MB/s

Controller confidence

91%

model converged

Concurrency

48 / 128

workers × shards

p99 latency

21.6 ms

baseline 21.6 ms

Throttling

None

0 events this run

Adaptive Control Loop

One loop, running continuously against every target.

Stage · Observe

Rate control

Throughput, capacity ceiling and latency

Amber markers are rate changes issued by the controller. Utilisation of the current estimate is 88.0%.

Actual throughputEstimated safe capacityTarget ratep99 latencyRate change

Controller Decisions

Every rate change, with the observation that caused it.

22:25:08INCREASE+8%
Increased throughput by 8% — target latency remained stable across two probe windows.
22:26:03HOLD
Held throughput — feedback indicated rising latency at the current rate.
22:27:07REDUCE-15%
Reduced throughput by 15% after throttling was detected on the destination.
22:27:28CHECKPOINT
Checkpoint written — partition-8421 verified.
22:27:47PROBE+3%
Probe window opened — nudging 3% above estimate to keep the capacity model honest.

Recovery

Last verified checkpoint

partition-8421

3419.3 GB verified

22:25:56 UTC · 3 minutes ago

On interruption Laminar resumes from the last verified checkpoint. Worst case is minutes of replay, not a restart.

Audit timeline

12:15:55Operation started
s3://laminar-archive-use1 → s3://laminar-archive-euc1, adaptive mode: Aggressive (throughput objective)
12:16:35Capacity model initialised
Initial estimate 2100 MB/s from 40s observation window