From owner-freebsd-fs@freebsd.org Tue Jan 5 11:08:14 2016 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 53F59A62038 for ; Tue, 5 Jan 2016 11:08:14 +0000 (UTC) (envelope-from matt.churchyard@userve.net) Received: from smtp-outbound.userve.net (smtp-outbound.userve.net [217.196.1.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.userve.net", Issuer "Go Daddy Secure Certificate Authority - G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id DFC2B1DA2 for ; Tue, 5 Jan 2016 11:08:12 +0000 (UTC) (envelope-from matt.churchyard@userve.net) Received: from owa.usd-group.com (owa.usd-group.com [217.196.1.2]) by smtp-outbound.userve.net (8.15.1/8.15.1) with ESMTPS id u05AjX70023624 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=FAIL); Tue, 5 Jan 2016 10:45:39 GMT (envelope-from matt.churchyard@userve.net) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=userve.net; s=201508; t=1451990746; bh=YI2qt/kZmVQpq19+PEvWY5e4E614LvIK3tzRe+xitZY=; h=From:To:CC:Subject:Date:References:In-Reply-To; b=mdwSA9xH9SPGNuIWiqivZ/j2yMpQZnfKx6wZux/KwBSD/vw3qO4bXmlbYPB7inDXT U2SBzMJopjf6SUSfZ53eb6flbL7gaJe5Zwq1aMu6XLr8jwk6vriFLBAkG2Jx6epS8p PUy/4z5CBDhe4B7YJzFTr5f/DW2VS5N1B3ecBYb0= Received: from SERVER.ad.usd-group.com (192.168.0.1) by SERVER.ad.usd-group.com (192.168.0.1) with Microsoft SMTP Server (TLS) id 15.0.847.32; Tue, 5 Jan 2016 10:45:28 +0000 Received: from SERVER.ad.usd-group.com ([fe80::b19d:892a:6fc7:1c9]) by SERVER.ad.usd-group.com ([fe80::b19d:892a:6fc7:1c9%12]) with mapi id 15.00.0847.030; Tue, 5 Jan 2016 10:45:28 +0000 From: Matt Churchyard To: "Mikhail T." , Bruce Evans CC: freebsd-fs Subject: RE: NFS reads vs. writes Thread-Topic: NFS reads vs. writes Thread-Index: AQHRRfabDWUMRFTBukiGQgVGFsctUJ7pbBOAgAEo3oCAAEJlgIABNEsAgABZwACAAAXZAIAAUDUw Date: Tue, 5 Jan 2016 10:45:27 +0000 Message-ID: References: <8291bb85-bd01-4c8c-80f7-2adcf9947366@email.android.com> <5688D3C1.90301@aldan.algebra.com> <495055121.147587416.1451871433217.JavaMail.zimbra@uoguelph.ca> <568A047B.1010000@aldan.algebra.com> <20160105143542.X1191@besplex.bde.org> <568B574A.7010603@aldan.algebra.com> In-Reply-To: <568B574A.7010603@aldan.algebra.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.0.10] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Jan 2016 11:08:14 -0000 >On 05.01.2016 00:19, Bruce Evans wrote: >>>> It is a chunk of an older SSD, that also houses the OS. But it is=20 >>>> usually idle, because executables and libraries are cached in the=20 >>>> abundant RAM. I've seen it do 90+Mb/s (sequential)... >> >> Please be more careful with units (but don't use MiB's; I should=20 >> killfile that). 90 Mbits/s is still slow. >Mb is megabyte in my book. This is the unit used by `systat -vm', which I = mentioned earlier. 90 megabytes/s is still not at the limit of Gigabit >Eth= ernet, however, but it is a lot closer to it. You have a different book to most then. I've always understood 'b' to mean bits, and 'B' to mean bytes. While every= one on here will understand what you were trying to say in context, given p= urely that number, I would expect most people to interpret it as 90+Mb/s = =3D ~11+MB/s. That is not what you meant, hence why Bruce said be careful w= ith the units. I just had a quick look in 'systat -vm' and it seems to use a capital B eve= rywhere from what I can see. Matt >Yours, > -mi