Reduce Rollout Manager Load with Distributed Session Merging - #66
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odp
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This was referenced Jul 15, 2026
This reverts commit cf6de42.
…er to match previous implementation
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Changes made, sorted by importance:
Moved trajectory/sample merging out of the rollout manager and into the distributed Ray actor session servers, so merging is parallelized instead of done one-by-one centrally.
Added Ray actor-based session servers with multiple backends, so rollout collection work can be spread across session server actors.
Reduced rollout-manager CPU and memory pressure by returning already-merged/compacted session data from the session servers.
Avoided unnecessary tokenizer decode work during sample construction;
sample.responseis left as""andsample.metadata["response_decoded"] = False.Updated merge logic to respect
sample.metadata["response_decoded"], so it does not decode observation tokens unless responses are actually decoded.Hardened the session client/server path with explicit HTTP timeouts, retries, bounded concurrency, and better logging.