Author

Hui Cao

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Open access Oct 2026

Nephele: Bridging DDR–CXL Latency Gaps with Benefit-Aware Caching for In-Memory Databases on Hybrid Memory

In-memory databases rely on DDR memory for performance, yet capacity scaling is impeded by physical constraints and the high cost of high-density DIMMs. Compute Express Link (CXL) provides a practical path for memory expansion through a DDR-compatible interface. However, CXL memory exhibits inferior latency and bandwid...

Hui Cao, S. Yang, Yun-Fan Li et al. · ACM Transactions on Architec... · 1 citation

Preprint Oct 2026

Indexing Designs and Adaptive Data Distribution Optimization for In-Memory Databases on Hybrid DDR--CXL Memory

CXL memory expands single-node memory capacity for in-memory databases but has higher latency and lower bandwidth than local DDR. Hybrid DDR--CXL databases require joint indexing and data distribution design. Indexing designs differ in access and migration paths and constrain the placement of indexes and tuples, creati...

Hui Cao, S. Yang, Yi-Nan Zhang et al. · 0 citations