Title :
Optimizing a highly fault tolerant software RAID for many core systems
Author :
Klein, Henning ; Keller, Jörg
Author_Institution :
Fujitsu Technol. Solutions GmbH, Boblingen, Germany
Abstract :
We present a parallel software driver for a RAID architecture to detect and correct corrupted disk blocks in addition to tolerate disk failures. The necessary computations demand parallel execution to avoid the processor being the bottleneck for a RAID with high bandwidth. The driver employs the processing power of multicore and manycore systems. We report on the performance of a prototype implementation on a quadcore processor that indicates linear speedup and promises good scalability on larger machines. We use reordering of I/O orders to ensure balance between CPU and disk load.
Keywords :
RAID; device drivers; fault tolerant computing; microprocessor chips; parallel architectures; RAID architecture; corrupted disk blocks; demand parallel execution; disk failures; fault tolerant software; many core systems; multicore systems; parallel software driver; quadcore processor; Bandwidth; Computer architecture; Concurrent computing; Fault detection; Fault tolerant systems; Linux; Multicore processing; Prototypes; Software prototyping; Yarn; Fault-Tolerant Software Design; Multi-Core RAID Architecture;
Conference_Titel :
High Performance Computing & Simulation, 2009. HPCS '09. International Conference on
Conference_Location :
Leipzig
Print_ISBN :
978-1-4244-4906-4
Electronic_ISBN :
978-1-4244-4907-1
DOI :
10.1109/HPCSIM.2009.5194712
