The Tamuz raid

RAID-CUBE: The Modern Datacenter Case for RAID

“Big Data” processing in modern datacenters dramatically increases the data volume moving between applications and storage. A major challenge is achieving acceptable levels of availability and reliability in an environment characterized by huge storage capacities, large numbers of disk drives, and very high interconnection bandwidth (e.g., 100 petabytes and 17000 disk drives at CERN1). In this ...

Swift/RAID: A Distributed RAID System

The Swift VO architecture is designed to provide high data rates in support of multimedia type applications in general-purpose distributed environments through the use of distributed striping. Strþing techniques place sections of a single logical data space onto multiple physical devices. The original Swift prototype was designed to validate the architecture, but did not provide fault tolerance...

Don't Let RAID Raid the Lifetime of Your SSD Array

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...

Computers RAID

The RAID-6 Liberation Codes

The RAID-6 specification calls for a storage system with multiple storage devices to tolerate the failure of any two devices. Numerous erasure coding techniques have been developed that can implement RAID-6; however, each has limitations. In this paper, we describe a new class of RAID-6 codes called the Liberation Codes. These codes encode, update and decode either optimally or close to optimal...