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Combined data caching and delayed parity update in RAID with SSD cache
- Source :
- SAC
- Publication Year :
- 2016
- Publisher :
- ACM, 2016.
-
Abstract
- Hybrid storage that uses SSD over disk-based RAID is usual in enterprise environments. One way to exploit an SSD over RAID is using it as data cache and another is using it as LeavO cache that reduces parity update overhead of RAID. In this paper, we combine data caching and LeavO caching schemes and identify optimal cache sizes. To do that, we derive cost models of combined data and LeavO caching. Also, we propose Adaptive LeavO Cache that dynamically adjusts data cache and LeavO cache sizes for evolving workloads. The experiments show that the Adaptive LeavO Cache performs far better than conventional data caching scheme and on a par with the off-line optimal scheme that determines optimal sizes after exploring all possible sizes of data cache and LeavO cache.
- Subjects :
- CPU cache
Cache coloring
Computer science
RAID
Pipeline burst cache
02 engineering and technology
Parallel computing
Cache pollution
Cache-oblivious algorithm
law.invention
Write-once
Cache invalidation
law
020204 information systems
0202 electrical engineering, electronic engineering, information engineering
Cache algorithms
Standard RAID levels
Snoopy cache
Hardware_MEMORYSTRUCTURES
MESI protocol
Adaptive replacement cache
020207 software engineering
MESIF protocol
Smart Cache
Bus sniffing
Page cache
Cache
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Proceedings of the 31st Annual ACM Symposium on Applied Computing
- Accession number :
- edsair.doi...........f9ef0f20931e50cab74c21ade890090a