From owner-freebsd-hardware@freebsd.org Fri Jul 31 08:03:27 2015 Return-Path: Delivered-To: freebsd-hardware@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 C0E989AF792 for ; Fri, 31 Jul 2015 08:03:27 +0000 (UTC) (envelope-from wjw@digiware.nl) Received: from smtp.digiware.nl (smtp.digiware.nl [31.223.170.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 6C86819FC; Fri, 31 Jul 2015 08:03:27 +0000 (UTC) (envelope-from wjw@digiware.nl) Received: from rack1.digiware.nl (unknown [127.0.0.1]) by smtp.digiware.nl (Postfix) with ESMTP id 7AF8E153466; Fri, 31 Jul 2015 10:03:16 +0200 (CEST) X-Virus-Scanned: amavisd-new at digiware.nl Received: from smtp.digiware.nl ([127.0.0.1]) by rack1.digiware.nl (rack1.digiware.nl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UgLKOv3MzHKX; Fri, 31 Jul 2015 10:02:49 +0200 (CEST) Received: from [IPv6:2001:4cb8:3:1:25e7:7dd8:eafd:dd56] (unknown [IPv6:2001:4cb8:3:1:25e7:7dd8:eafd:dd56]) by smtp.digiware.nl (Postfix) with ESMTPA id 979F8153431; Fri, 31 Jul 2015 09:31:53 +0200 (CEST) Subject: Re: L2 cache errors??? To: Erich Dollansky References: <55B7B8FA.2060800@digiware.nl> <55B7C059.5020701@sentex.net> <55B7CCA1.4020906@digiware.nl> <55B7D24B.5060709@FreeBSD.org> <55B7DBBF.2090009@digiware.nl> <20150731132251.5b8581c2@X220.alogt.com> Cc: Josh Paetzel , freebsd-hardware@freebsd.org From: Willem Jan Withagen Message-ID: <55BB2469.5040507@digiware.nl> Date: Fri, 31 Jul 2015 09:31:53 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 MIME-Version: 1.0 In-Reply-To: <20150731132251.5b8581c2@X220.alogt.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 31 Jul 2015 08:03:27 -0000 On 31/07/2015 07:22, Erich Dollansky wrote: > Hi, > > On Tue, 28 Jul 2015 21:45:03 +0200 > Willem Jan Withagen wrote: > >> On 28/07/2015 21:04, Josh Paetzel wrote: >> >> Offlining CPus, cool. > > and bringing them back online when the problem is fixed. The hardware > there supports that things get changed while the system is running. A > PC costs normally less than the extra hardware required to do this. Yes, I can imagine things being expensive. Probably like high-end routers... There you can swap also just about anything.. Expensive got a complete new meaning when I saw a set of 3 core routers being delivered at a friends ISP with a pricetag > 1.000.000 euros... Fortunately it was list price, but even still: A lot of money. But then still you'd swap a processor board, running on the spare. And I guess there we offline the whole board. Last time I heard about things like this in computers, we were talking IBM mainframes, or Tandem. Both long time ago. Obviously haven't done much in High availability lately. Although I've grown to look at HA as: don't put it all in one (expensive) box, but get more (cheaper) boxes, But I guess there are places where this doesn't work. --WjW