Characterizing flash memory: anomalies, observations, and applications
Proceedings of the 42nd Annual IEEE/ACM International Symposium on Microarchitecture
Extending SSD lifetimes with disk-based write caches
FAST'10 Proceedings of the 8th USENIX conference on File and storage technologies
The pitfalls of deploying solid-state drive RAIDs
Proceedings of the 4th Annual International Conference on Systems and Storage
Analytic modeling of SSD write performance
Proceedings of the 5th Annual International Systems and Storage Conference
Proceedings of the 1st Workshop on Interactions of NVM/FLASH with Operating Systems and Workloads
Triple-A: a Non-SSD based autonomic all-flash array for high performance storage systems
Proceedings of the 19th international conference on Architectural support for programming languages and operating systems
| Hi-index | 0.00 |
Parity protection at system level is typically employed to compose reliable storage systems. However, careful consideration is required when SSD based systems employ parity protection. First, additional writes are required for parity updates. Second, parity consumes space on the device, which results in write amplification from less efficient garbage collection at higher space utilization. This paper analyzes the effectiveness of SSD based RAID and discusses the potential benefits and drawbacks in terms of reliability. A Markov model is presented to estimate the lifetime of SSD based RAID systems in different environments. In a single array, our preliminary results show that parity protection provides benefit only with considerably low space utilizations and low data access rates. However, in a large system, RAID improves data lifetime even when we take write amplification into account.