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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Am 12.06.24 um 02:14 schrieb Paul E Luse: > On Wed, 12 Jun 2024 01:04:18 +0200 > Reindl Harald wrote: > >> >> >> Am 11.06.24 um 20:31 schrieb Piergiorgio Sartor: >>> I'm setting up a system with 2 SSD M.2 (NVME). >>> >>> I was wondering if would it be better, performace >>> wise, to have a RAID-10 near layout or a RAID-1. >>> >>> Looking around I found only one benchmark: >>> >>> https://strugglers.net/~andy/blog/2019/06/02/exploring-different-linux-raid-10-layouts-with-unbalanced-devices/ >>> >>> Which uses mixed SSD, NVME and SATA. >>> >>> Does anybody have any suggestions, links, or >>> ideas on the topic? >>> >>> BTW, practically speaking, what's the difference, >>> between the two RAIDs? >> >> i wouldn't even consider a RAID10 with two disks, especially with SSD >> and practically you end with a unsupported RAID1 because there are no >> stripes with 2 disks >> >> > I don't disagree but I would recommend you try each variation and > measure the performance for yourself. It's a great learning experience > if you haven't done it before and there's nothing like trusting your > own data over on your own system/config something that someone else has > done when there are so many factors that can affect performance. the problem with benchmarks is that they often don't reflect mixed, real-world performance - for virtual machine workload the "far" layout wins in case of HDD with NVME RAID i pretend it don't matter enough to even waste your time