Open Access
43- https://doi.org/10.1109/tvlsi.2013.2275737
Partial Parity Cache and Data Cache Management Method to Improve the Performance of an SSD-Based RAID
- Jul 1, 2014
- IEEE Transactions on Very Large Scale Integration (VLSI) Systems
- Ching-Che Chung +1 more
In this paper, a partial parity cache and data cache management method is presented for reducing the parity updating cost of a solid-state disk (SSD) based redundant array of inexpensive disk (RAID) system, thereby which the input/output (I/O) performance of the RAID system can be improved. SSDs have many advantages compared to hard disk drives. However, it is not advisable to directly add SSDs into a RAID system because doing so will decrease the performance and the life-time of the SSDs. In the RAID-5 system, parity generation includes read and write operations to the SSDs. Whenever there is a new write request to the RAID, the related parity must be updated and written to the SSDs. Such frequent parity updates result in poor RAID performance and shortens the life-time of the SSDs. This paper combines the prior methods and the proposed efficient buffer management method with a data cache. The proposed method reduces the number of read and write operations for generating parities in the RAID system. Experimental results show that the I/O performance of the RAID-5 system can be improved by 76% by using the proposed method.
- # Solid-state Disk
- # RAID-5 System
- # Parity Data
- # Data Cache
- # Performance Of System
- # Management Method
- # Array Of Disk
- # Disk System
- # Proposed Method
- # Efficient Management
