FA-99247 / Distributed training aggregation / Member archive
Disjoint gradient contributions are averaged instead of summed · case 02
Disjoint gradient contributions are averaged instead of summed.
Case contract
Given equal-length partial gradient vectors for one parameter block, return their elementwise sum; empty input returns [].
Why this case matters
A toy distributed-training contract makes replica and shard contribution rules explicit without claiming framework compatibility or performance.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| two workers | [4.0, 3.0] | [8, 6] | Failed |
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