From owner-freebsd-questions@FreeBSD.ORG Sun Mar 17 04:56:11 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 044D5176 for ; Sun, 17 Mar 2013 04:56:11 +0000 (UTC) (envelope-from m.e.sanliturk@gmail.com) Received: from mail-ve0-f171.google.com (mail-ve0-f171.google.com [209.85.128.171]) by mx1.freebsd.org (Postfix) with ESMTP id AEC2910A for ; Sun, 17 Mar 2013 04:56:10 +0000 (UTC) Received: by mail-ve0-f171.google.com with SMTP id b10so3598904vea.2 for ; Sat, 16 Mar 2013 21:56:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:date:message-id:subject:from:to :content-type; bh=NCM4EMcd1hX2KFNirVBB2mL7KkKL6FXfwJlF3WL2se8=; b=YM8uKdcIIwMgcg/ABfQo8lmYNty5fF+OQnVZvG8m0mxkDuQcfmeznfCcTOvewuejtv TPpJM2yqSTDazz/QHpyi4hbAevvTl8hbfCIbFGLLbWDw4+hKTkgiRdanT9rMQkGUpGQq TLNnlLMRNDWIg/Q/480yaqoIL/3CpF9IViSFZdBOEu+HyO6mss0LUI+7ksW+cvVpsaY5 mm/I6yunD9XERrqXlZVnOq4JFnCEXHRxSyb/bni6vxiJs/BvKosNS/gYcOaiURsJwIQw bnvC16lsLWMtBVP+mW/D8Kf7Akoa5BERjEaWQoG57dvAeN4zEuZJUSTYNK6NWQtL65A8 V1CA== MIME-Version: 1.0 X-Received: by 10.220.222.8 with SMTP id ie8mr14011059vcb.27.1363496164111; Sat, 16 Mar 2013 21:56:04 -0700 (PDT) Received: by 10.58.132.203 with HTTP; Sat, 16 Mar 2013 21:56:04 -0700 (PDT) Date: Sat, 16 Mar 2013 21:56:04 -0700 Message-ID: Subject: Re: NFS Performance: Weirder And Weirder From: Mehmet Erol Sanliturk To: FreeBSD Questions Mailing List Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 17 Mar 2013 04:56:11 -0000 There is one more point to check : >From your mount information , in the server , directories are on DIFFERENT drives . Assume one of the drives is very "INTELLIGENT" to save power . During local reading , due to reading speed , it may not go to "SLEEP" , but during network access , it may go to sleep due to its exceeded waiting time . If this is the case , please stay away from INTELLIGENT drives in a server : These are designed and produced by very IGNORANT entities . For simple , personal applications , their latency may not be noticed very much , but in a server , they can not be used . Another point may be file sizes . To check effect of file size , into the two different directories copy a large ( for example , 5 GB , or a 4.n GB .iso file ) and transmit these same files from their directories to a single client . If directory structure makes a difference , assuming hardware parts and client does not behave differently to these files , performance difference may be attributed to server side . Mehmet Erol Sanliturk