Patronus: High-Performance and Protective Remote Memory
summary
PATRONUS implements a protective RDMA remote-memory system that preserves one-sided access while using memory windows and tokenized permissions to enforce fine-grained access. It attaches microsecond-scaled leases and offloads lease refresh to clients via one-sided writes, reclaims orphan permissions automatically, and masks QP errors with QP overprovisioning that promotes spare QPs on failure. Built and evaluated on a 4-machine testbed across remote hash table, B+ tree and FaaS workloads, it shows 2.4%–27.7% protection overhead and up to 5.2× throughput vs. prior protected systems.
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chapters (11)
- 0:00Start
- 1:56Necessity: Protection for Remote Memory
- 5:14Goal - Protective System
- 5:54Patronus Overview
- 7:17Opportunity - Memory Window (MW)
- 8:56Technique (I)-MW Operation Reduction
- 10:11Technique (2) - Lease for Client Failures
- 11:38Technique (3) - Over-Provisioning for QP failures
- 12:38Experimental Setup
- 13:00Evaluation (1): Overall Performance
- 14:16Evaluation (2): Failure Handling
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