specific method · filed under optimization
Asymmetric local-read and single-writer cache paths
A cache I/O arrangement in which nodes read locally and a designated sidecar archives caches to shared storage.
Also called Asymmetric read/write cache paths.
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Evidence
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At job completion, a single designated sidecar process archives the caches back to shared storage as compressed tarballs, rather than all nodes writing simultaneously.
usedsoftware implementationin Nemotron 3 UltraNVIDIA
Filed alongside
Other methods under optimization :: training runtime.
Offline checkpoint mergingAsynchronous checkpointingAutotune configuration generationBatch-level embedding prefetchCaching the distributed checkpoint save planComposable activation storage policiesCPU-resident optimizer statesCross-rank remote activation offloadingDouble-buffered chunked streaming of reference-model weightsElement-wise activation recomputationGPU-to-GPU weight synchronization over GPUDirect RDMAHeartbeat-driven fault toleranceIn-flight recovery systemIn-flight weight updatesJob-level eviction and reclaimMinimal recomputation-graph extraction by backward traversalOverlapping NCCL transfers with device-to-host copiesPersistent checkpoint worker processesPersistent shared-storage cache for compiled artifactsPolicy-model gradient-buffer reuse for reference-model weightsPost-iteration NVMe offloading of training statesPre-admission hardware stress testingSame-node sticky pod respawnSeeding node-local storage from a warm shared cache