Composable CXL Memory as a Kubernetes-Native Shared Memory for LLM Serving
We present a Kubernetes Dynamic Resource Allocation (DRA) driver that makes composable CXL memory a schedulable cluster resource, and evaluate the resulting shared-memory tier for cross-node KV-cache reuse in LLM serving. The driver composes CXL regions on demand, materializes them as DAX devices on each participating host, and injects them into pods under a single Container Device Interface (CDI) name so that pods on different nodes access the same physical region. A shared-memory connector for vLLM/llm-d uses that region as a KV-cache tier with a slot directory embedded inside the shared medium, which eliminates the need for an external metadata service. On a two-node cluster with a 512...
| Authors | Hongjian Fan, Kevin Zhang, David Habinsky et al. |
|---|---|
| Primary category | cs.DC |
| Published | 9 September 2026 |
| Last updated at source | 9 September 2026 |
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