From: "Finlayson, James M CIV (USA)" <james.m.finlayson4.civ@mail.mil>
To: 'Gal Ofri' <gal.ofri@volumez.com>,
"'linux-raid@vger.kernel.org'" <linux-raid@vger.kernel.org>
Subject: RE: [Non-DoD Source] Re: Can't get RAID5/RAID6 NVMe randomread IOPS - AMD ROME what am I missing?????
Date: Tue, 3 Aug 2021 14:59:45 +0000 [thread overview]
Message-ID: <5EAED86C53DED2479E3E145969315A2385856215@UMECHPA7B.easf.csd.disa.mil> (raw)
In-Reply-To: <20210801142107.407b000a@gofri-dell>
Gal,
My SA just gave me the server with the 5.14 RC4 kernel built. I have a two pass preconditioning run going right now to get us maximum results. I expect to be able to run the tests hopefully by COB Wednesday. Preconditioning will take 8 hours unfortunately (15.36TB drives), I have to make BIOS changes for apples to apples "hero runs" and then get the mdraid's created. In your opinion, if I bypass the initial formatting with mdadm --assume-clean, will that make a difference in the results? I usually let the format run, but I want to get you results as soon as possible.
Thanks,
Jim
-----Original Message-----
From: Gal Ofri <gal.ofri@volumez.com>
Sent: Sunday, August 1, 2021 7:21 AM
To: Finlayson, James M CIV (USA) <james.m.finlayson4.civ@mail.mil>
Cc: 'linux-raid@vger.kernel.org' <linux-raid@vger.kernel.org>
Subject: [Non-DoD Source] Re: Can't get RAID5/RAID6 NVMe randomread IOPS - AMD ROME what am I missing?????
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----
Hey Jim,
Read iops (rand/seq) were addressed in a recent commit:
97ae27252f49 md/raid5: avoid device_lock in read_one_chunk() Caution-https://github.com/torvalds/linux/commit/97ae27252f4962d0fcc38ee1d9f913d817a2024e
It was merged into 5.14, so you can either cherry-pick it or just use a latest-master kernel.
Sounds like your environment is stronger than the one I used for the testing, so please do share your benchmark if you manage to surpass the results described in the commit message.
Cheers,
Gal Ofri,
Volumez (formerly storing.io)
next prev parent reply other threads:[~2021-08-03 15:00 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-27 20:32 Can't get RAID5/RAID6 NVMe randomread IOPS - AMD ROME what am I missing????? Finlayson, James M CIV (USA)
2021-07-27 21:52 ` Chris Murphy
2021-07-27 22:42 ` Peter Grandi
2021-07-28 10:31 ` Matt Wallis
2021-07-28 10:43 ` [Non-DoD Source] " Finlayson, James M CIV (USA)
2021-07-29 0:54 ` [Non-DoD Source] " Matt Wallis
2021-07-29 16:35 ` Wols Lists
2021-07-29 18:12 ` Finlayson, James M CIV (USA)
2021-07-29 22:05 ` Finlayson, James M CIV (USA)
2021-07-30 8:28 ` Matt Wallis
2021-07-30 8:45 ` Miao Wang
2021-07-30 9:59 ` Finlayson, James M CIV (USA)
2021-07-30 14:03 ` Doug Ledford
2021-07-30 13:17 ` Peter Grandi
2021-07-30 9:54 ` Finlayson, James M CIV (USA)
2021-08-01 11:21 ` Gal Ofri
2021-08-03 14:59 ` Finlayson, James M CIV (USA) [this message]
2021-08-04 9:33 ` [Non-DoD Source] " Gal Ofri
[not found] ` <AS8PR04MB799205817C4647DAC740DE9A91EA9@AS8PR04MB7992.eurprd04.prod.outlook.com>
[not found] ` <5EAED86C53DED2479E3E145969315A2385856AD0@UMECHPA7B.easf.csd.disa.mil>
[not found] ` <5EAED86C53DED2479E3E145969315A2385856AF7@UMECHPA7B.easf.csd.disa.mil>
2021-08-05 19:52 ` Finlayson, James M CIV (USA)
2021-08-05 20:50 ` Finlayson, James M CIV (USA)
2021-08-05 21:10 ` Finlayson, James M CIV (USA)
2021-08-08 14:43 ` Gal Ofri
2021-08-09 19:01 ` Finlayson, James M CIV (USA)
2021-08-17 21:21 ` Finlayson, James M CIV (USA)
2021-08-18 0:45 ` [Non-DoD Source] " Matt Wallis
2021-08-18 10:20 ` Finlayson, James M CIV (USA)
2021-08-18 19:48 ` Doug Ledford
2021-08-18 19:59 ` Doug Ledford
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