At least for the raid5 case that would seem to be a loss performance-wise: - AFAIK, even a single good x86 core can XOR memory at faster than the DRAM memory bandwidth of the system. - High end GPUs have more memory bandwidth than the x86 and could perform large XOR operations between buffers at a faster rate. But the memory bandwidth over the bus to the gfx card is lower than the main memory DRAM bandwidth, so you would have a net loss from having to move the data between the GPU and CPU. -----Original Message----- From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid-owner@xxxxxxxxxxxxxxx] On Behalf Of Pieter De Wit Sent: Thursday, December 12, 2013 2:28 AM To: linux-raid@xxxxxxxxxxxxxxx Subject: Using Video cards (CUDA) for RAID parity Hi List, Given the recent work done with techs like CUDA etc. - has the idea been floated to use the video card for RAID parity calculations vs the CPU ? Bitcoin and plenty others have shown the true speed of these cards. This might be a cheaper version of a RAID card. Cheers, Pieter -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
