Date: Fri, 22 Feb 2019 14:59:28 +0530 From: Rajesh Kumar <rajfbsd@gmail.com> To: Enji Cooper <yaneurabeya@gmail.com> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: Any ideal way to run FIO benchmarking for NVMEe devices in FreeBSD Message-ID: <CAAO%2BANPUF8u54Xvu4uN=nRAEXaLNtBX%2BJkYzRbb5jrZMRTZ6gA@mail.gmail.com> In-Reply-To: <0E136DED-C1AD-481C-B243-C943D4F8D9C5@gmail.com> References: <CAAO%2BANM34aY4g%2BFjPdt8F2sNo5e6N2dZdTDKavEJwvRbNJz=Gw@mail.gmail.com> <0E136DED-C1AD-481C-B243-C943D4F8D9C5@gmail.com>
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Hi Enji Cooper, I am using Samsung 960 PRO https://www.samsung.com/semiconductor/minisite/ssd/product/consumer/960pro/ On Fri, Feb 22, 2019 at 2:36 PM Enji Cooper <yaneurabeya@gmail.com> wrote: > > > On Feb 22, 2019, at 12:51 AM, Rajesh Kumar <rajfbsd@gmail.com> wrote: > > > > Hi, > > > > I am trying to run FIO benchmark test with NVMe devices and see how > FreeBSD > > performs. There are lot of variables and combination. So, can anyone > > suggest a Ideal way to do FIO benchmarking in FreeBSD? My intent is to > > check what is the maximum throughput and IOPS the device delivers in > > FreeBSD. > > > > Few questions regarding the same, > > > > 1. Should we use "posixaio" as the ioengine (or) something else? > > 2. Should we use single thread (or) multiple threads for test? If > > multiple threads, how can we decide on the optimal thread count? > > 3. Should we use "raw device files" (Eg: nvme namespace file - > > /dev/nvme0ns1) without filesystem (or) use a mounted filesystem with a > > regular file (Eg: /mnt/nvme/test1). Looks like raw device files give > better > > numbers. > > 4. Should we use a shared file (or) one file per thread? > > 5. I believe 1Job should be fine for benchmarking. (or) should we try > > multiple jobs? > > > > Please let me know your suggestions. Also, please suggest performance > > tuning methods for NVMe and storage devices in general. > > Hi Rajesh, > Is there a data sheet for the NVMe device? > Cheers, > -Enji
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