Date: Wed, 16 Jan 2013 08:20:46 +0100 (CET) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: Karim Fodil-Lemelin <fodillemlinkarim@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: IBM blade server abysmal disk write performances Message-ID: <alpine.BSF.2.00.1301160820220.4559@wojtek.tensor.gdynia.pl> In-Reply-To: <50F601D2.3090009@gmail.com> References: <CAA3ZYrACHLU-4OyhLdD%2BmfCDR_kubBg-AiVcopL-skqDurE7YA@mail.gmail.com> <50F5BC08.1060700@gmail.com> <alpine.BSF.2.00.1301152251530.2950@wojtek.tensor.gdynia.pl> <50F601D2.3090009@gmail.com>
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> Transfer rates: > outside: 102400 kbytes in 0.685483 sec = 149384 kbytes/sec > middle: 102400 kbytes in 0.747424 sec = 137004 kbytes/sec > inside: 102400 kbytes in 1.051036 sec = 97428 kbytes/sec this is right. > Yet we get only a tiny fraction of those (it takes 20 seconds to transfer > 10MB!) when using dd. I also doubt its dd's behavior since how can we explain dd is fine. hardware configuration isn't
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