February 7, 20197 yr Is anyone running a btrfs raid10 pool of ssds and if so have you done any kind of benchmarking to determine what (if any) performance gains there are over raid1? Trying to determine if it's worth running four Samsung 950 pro NVMe drives in a single pool or separate raid1 pools.
February 7, 20197 yr There should always be some gains, just don't expect double the speed, I tested some time ago and IIRC performance gains were from 30 to 50%, though with NVMe devices and since they are fast on their own it might not even be that noticeable, depending on the workload.
February 7, 20197 yr Author 6 hours ago, johnnie.black said: There should always be some gains, just don't expect double the speed, I tested some time ago and IIRC performance gains were from 30 to 50%, though with NVMe devices and since they are fast on their own it might not even be that noticeable, depending on the workload. This pool would be mainly for VMs but also for downloads. Currently when my NZBs extract on my single SATA SSD cache drive, it drops my download speed in half because the disk IO can't keep up. I'd like to change that. But perhaps as you alluded, a single NVMe that can write at 3-4 times the speed of my current SATA SSD will suffice on it's own. Edited February 7, 20197 yr by IamSpartacus
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