From owner-freebsd-questions@freebsd.org Thu Sep 15 19:11:30 2016 Return-Path: Delivered-To: freebsd-questions@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 4B933BDB084 for ; Thu, 15 Sep 2016 19:11:30 +0000 (UTC) (envelope-from greg.marsh@gmail.com) Received: from mail-it0-x233.google.com (mail-it0-x233.google.com [IPv6:2607:f8b0:4001:c0b::233]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 101E53B2 for ; Thu, 15 Sep 2016 19:11:30 +0000 (UTC) (envelope-from greg.marsh@gmail.com) Received: by mail-it0-x233.google.com with SMTP id 15so6959107ita.1 for ; Thu, 15 Sep 2016 12:11:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-transfer-encoding:mime-version:subject:message-id:date :references:in-reply-to:to; bh=LEFag5bT1NarEjiC0L4sXlP2z2WnRuEYDY+PF8IyERw=; b=rzY46zPc6NWPQeo/9qxwAZSRG0LV+WWvOZcElaLB8Wvb65h8dZIc08VtarUygcMk+r 8yh1R8ojRwewA6NEt6SqS/8IDfqMtRI7d9wKKcFMKDlLS05iy046at9Rt4jhgg01OsE0 YtdKZxjxcbeAplbRMZOw7YnvGUToRi/tIBJ6XnaOwuRmEloMoS1/XJau9D1uxm4DFEdp WydoNJYKRfas7Ac0GlfoynEBkXNJezKFKXXDmXXbPc/x26j+LE2Sdpvf0RpqsvA+hgoa qjRMe2qXJJCHpL0+9AwhR4qoKmU3tY9nxrbC75l83YplC2BvbIuC2lEfNc2+W+ppDlVf zJ5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:content-transfer-encoding:mime-version :subject:message-id:date:references:in-reply-to:to; bh=LEFag5bT1NarEjiC0L4sXlP2z2WnRuEYDY+PF8IyERw=; b=l+AhDuIQ9dz5tGb1uXJ0ZVbIws1TEtNjfFiuqd5r1UTa5Pf8Ir5nZj/HIsyMRiGwBL yx5IokAj6Mj08vBP9O23/+6R1EldJB11A9Ji08wxqHnW2XbLABJmJ0MIRvGiLmcAtObc Z16HZzPq9/R7uJMjF3jgKnhFf/G5Kc4DP+PGROstv7nnRWu+2QoOuzG0zct/V+EXyOBm Ykz/PANcaweTcdd/ssEjDHVl8m9nm4NvmKt3JSWnaTC5wISn90X85HuKhei8e5yYsl2m 5AK3zg/WwxhNSkyBRDDk8EAO3TBnW1hu0enJgheIQyrP/GXmGG3qVs/kodbDpEJ9UnVr k2iA== X-Gm-Message-State: AE9vXwNau4X+rdA7RSUWkrCxAZZfN0BYklDRd8nJrBjFSuMeEXB3Z3A0+S3j6BWF3XBtbA== X-Received: by 10.36.212.6 with SMTP id x6mr1251479itg.71.1473966688375; Thu, 15 Sep 2016 12:11:28 -0700 (PDT) Received: from [25.21.118.214] ([24.114.48.182]) by smtp.gmail.com with ESMTPSA id l15sm2225392ioe.14.2016.09.15.12.11.26 for (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 15 Sep 2016 12:11:27 -0700 (PDT) From: Greg Marsh Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (1.0) Subject: Re: Best kind of hard drive for heavy use? Message-Id: Date: Thu, 15 Sep 2016 15:11:25 -0400 References: <42.56.05022.D3A48D75@dnvrco-oedge02> <20160914120349.76a015cd@gumby.homeunix.com> <20160914175449.185d12b0@archlinux.localdomain> <20160914221954.00fb1d56@gumby.homeunix.com> <20160915013848.5564c238@archlinux.localdomain> <20160915140856.24af27ca@gumby.homeunix.com> <20160915155254.768f6f70@archlinux.localdomain> <20160915161026.62dffff7@gumby.homeunix.com> <20160915172446.7b018b87@archlinux.localdomain> <20160915190814.346f753d@gumby.homeunix.com> In-Reply-To: <20160915190814.346f753d@gumby.homeunix.com> To: freebsd-questions@freebsd.org X-Mailer: iPhone Mail (13G36) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Sep 2016 19:11:30 -0000 Hi all,=20 I've been reading this thread with joy and interest. I've been enamored with= hard drives ever since a high school teacher gave me a huge textbook to rea= d on how they worked. That was 30 years ago, when interleaving and MFM/RLL w= ere still things.=20 I eventually parlayed that into several storage management/architect jobs.=20= Enough with my background. One thing that I haven't seen mentioned in this discussion is that if heavy w= orkloads are the concern, why are spindle drives being considered? If SSD is= too much $/GiB, why is it only 1 spindle drive, when one could run a reason= ably quick, hard workload RAID-Z?=20 I don't know what the OP's budget is, but if speed is a priority, I wouldn't= consider any single spindle sata drive, regardless of make. I'd go SSD, kno= wing that it's only going to last me a few years at best. If that's all the t= ime he got out of his single spindle drive, why go back to one? If memory se= rves, modern SSD drives are all triple cell now, unlike the first few genera= tions of consumer SSDs, which were only single cell. My .02 on drive makers, at home I have a 4x2tb WD Red ZFS array, which takes= a licking and keeps on ticking. It's been running 24x7 for 2 years so far. = It's my backup and media streaming system, with a few other jailed systems t= hat are staging/testing before I implement live.=20 I hope that made sense.=20 Have a great day everyone! Cheers, Greg Sent from my iPhone > On Sep 15, 2016, at 14:08, RW via freebsd-questions wrote: >=20 > On Thu, 15 Sep 2016 17:24:46 +0200 > Ralf Mardorf via freebsd-questions wrote: >=20 >>> On Thu, 15 Sep 2016 16:10:26 +0100, RW via freebsd-questions wrote: >>> The important thing is that everything that can't (or shouldn't) be >>> discarded has to fit into swap+ram. Most desktops/workstations have >>> much more memory than they need, in which case you can safely >>> allocate swap plus most of the ram to tmpfs, if you want to. =20 >>=20 >> Ok, I didn't use FreeBSD since a while ago. On my Arch Linux, if the >> tmpfs is full, swap isn't used ... >=20 > I don't know why your particular system didn't swap, but that's not > true in general, e.g.: >=20 > https://www.kernel.org/doc/Documentation/filesystems/tmpfs.txt >=20 > "tmpfs puts everything into the kernel internal caches and grows and > shrinks to accommodate the files it contains and is able to swap > unneeded pages out to swap space." > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.or= g"