LoneStar RAID
| Autor: | Lars Nagel, André Brinkmann, Matthias Grawinkel |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Standard RAID levels
Hardware_MEMORYSTRUCTURES RAID Disk array controller Computer science business.industry Disk mirroring 020206 networking & telecommunications Fault tolerance 02 engineering and technology computer.software_genre Disk Data Format law.invention Hardware and Architecture law 020204 information systems Embedded system Data_FILES 0202 electrical engineering electronic engineering information engineering Operating system Cache Non-standard RAID levels business computer |
| Zdroj: | ACM Transactions on Storage. 12:1-29 |
| ISSN: | 1553-3093 1553-3077 |
| Popis: | The need for huge storage archives rises with the ever growing creation of data. With today’s big data and data analytics applications, some of these huge archives become active in the sense that all stored data can be accessed at any time. Running and evolving these archives is a constant tradeoff between performance, capacity, and price. We present the LoneStar RAID, a disk-based storage architecture, which focuses on high reliability, low energy consumption, and cheap reads. It is designed for MAID systems with up to hundreds of disk drives per server and is optimized for “write once, read sometimes” workloads. We use dedicated data and parity disks, and export the data disks as individually accessible buckets. By intertwining disk groups into a two-dimensional RAID and improving single-disk reliability with intradisk redundancy, the system achieves an elastic fault tolerance that can at least recover all 3-disk failures. Furthermore, we integrate a cache to offload parity updates and a journal to track the RAID’s state. The LoneStar RAID scheme provides a mean time to data loss (MTTDL) that competes with today’s erasure codes and is optimized to require only a minimal set of running disk drives. |
| Databáze: | OpenAIRE |
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