Date: Sun, 31 Jul 2016 18:51:27 +0200 From: Harry Schmalzbauer <freebsd@omnilan.de> To: Jason Zhang <jasonzhang@cyphytech.com> Cc: freebsd-stable@freebsd.org, freebsd-performance@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: mfi driver performance too bad on LSI MegaRAID SAS 9260-8i Message-ID: <579E2C8F.8090306@omnilan.de> In-Reply-To: <A23A6AA6-D53D-4FA9-9082-D8E230AEF81A@cyphytech.com> References: <A23A6AA6-D53D-4FA9-9082-D8E230AEF81A@cyphytech.com>
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Bez=A8=B9glich Jason Zhang's Nachricht vom 17.06.2016 09:16 (localtime):= > Hi, > > I am working on storage service based on FreeBSD. I look forward to a = good result because many professional storage company use FreeBSD as its = OS. But I am disappointed with the Bad performance. I tested the the pe= rformance of LSI MegaRAID 9260-8i and had the following bad result: > > 1. Test environment: > (1) OS: FreeBSD 10.0 release > (2) Memory: 16G > (3) RAID adapter: LSI MegaRAID 9260-8i > (4) Disks: 9 SAS hard drives (10000 rpm), performance is expe= cted for each hard drive =20 Were the drives completely initialized? I remember that at least one vendor had implemented read-past-write for every sector when written first. It was with 15k 3.5" spindles and I'm really not sure which vendor it was, so I won't name any. But "slow init" had solved a similir problem for me back then... -Harry
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