From owner-freebsd-questions@FreeBSD.ORG Fri Oct 14 05:45:07 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 41BE2106566B for ; Fri, 14 Oct 2011 05:45:07 +0000 (UTC) (envelope-from freebsd@penx.com) Received: from Elmer.dco.penx.com (elmer.dco.penx.com [174.46.214.165]) by mx1.freebsd.org (Postfix) with ESMTP id 00A758FC14 for ; Fri, 14 Oct 2011 05:45:06 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by Elmer.dco.penx.com (8.14.5/8.14.4) with ESMTP id p9E58Geg005327 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 13 Oct 2011 23:08:18 -0600 (MDT) (envelope-from freebsd@penx.com) Date: Thu, 13 Oct 2011 23:08:16 -0600 (MDT) From: Dennis Glatting X-X-Sender: dennisg@Elmer.dco.penx.com To: freebsd-questions@freebsd.org Message-ID: User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII Subject: Very large swap X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Oct 2011 05:45:07 -0000 This is kind of stupid question but at a minimum I thought it would be interesting to know. What is the limitations in terms of swap devices under RELENG_8 (or 9)? A single swap dev appears to be limited to 32GB (there are truncation messages on boot). I am looking at a possible need of 2-20TB (probably more) with as much main memory that is affordable. I am working with large data sets and there are various ways of solving the problem sets but simply letting the processors swap as they work through a given problem is a possible technique. Processors, memory, storage, and other hardware are open issues but for the minute I'm doing things on the cheap, which, admittedly, has a certain intellectual amusement factor. TIA