From owner-freebsd-current@FreeBSD.ORG Tue Apr 17 20:37:13 2007 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id EA97F16A404 for ; Tue, 17 Apr 2007 20:37:13 +0000 (UTC) (envelope-from Thomas.Sparrevohn@btinternet.com) Received: from smtp812.mail.ird.yahoo.com (smtp812.mail.ird.yahoo.com [217.146.188.72]) by mx1.freebsd.org (Postfix) with SMTP id 5F47013C457 for ; Tue, 17 Apr 2007 20:37:13 +0000 (UTC) (envelope-from Thomas.Sparrevohn@btinternet.com) Received: (qmail 60451 invoked from network); 17 Apr 2007 20:37:11 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btinternet.com; h=Received:X-YMail-OSG:From:To:Subject:Date:User-Agent:References:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-Disposition:Message-Id; b=VKnE1HoukBfEefd4b4xNSZEpwaTFCAzlTF91Hs6f327KMhPALBToaH4uR6q71xOUGvhpKV6YbMnGg5PHzcKd8cCeldtdqppN9yDTzzDgEbK2faHqCpFY+7BMdKmqH5LTkRjhA6nOk+DHbH6YJB3UIZJcSspOswDrMWq9lY3DxTs= ; Received: from unknown (HELO w2fzz0vc03.aah-go-on.com) (thomas.sparrevohn@btinternet.com@86.133.53.159 with login) by smtp812.mail.ird.yahoo.com with SMTP; 17 Apr 2007 20:37:11 -0000 X-YMail-OSG: Sbb41_EVM1kFF1WeIIqhduBQ4.ohvctgUD6A.8.Qz1xoZBoUozwmdhku0yAUehxl5YeXyP.0grsGAEHHXfYgaqMhJJbK3YTZOqlKLLBWM1GgQLMVFD9eDfY0PFg- From: Thomas Sparrevohn To: freebsd-current@freebsd.org Date: Tue, 17 Apr 2007 21:37:11 +0100 User-Agent: KMail/1.9.6 References: <200704171143.l3HBhDZB008693@peedub.jennejohn.org> In-Reply-To: <200704171143.l3HBhDZB008693@peedub.jennejohn.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200704172137.11184.Thomas.Sparrevohn@btinternet.com> Subject: Re: Some comments on ZFS X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Apr 2007 20:37:14 -0000 On Tuesday 17 April 2007 12:43:13 Gary Jennejohn wrote: > > Robert Watson writes: > > Interestingly enough, I see less memory pressure since switching to ZFS. > But I'm not using RAIDZ. Previously ``make buildworld'' would use much > more memory, probably for buffer caching. It looks like ZFS doesn't use > nearly as much buffer cache as UFS (which may not be a good thing). > On this system 4GB system - 2,3GB available - ZFS stops around 1,3GB Free whereas UFS continues until app. 700MB mark on a buildworld But the price seems to be much more disk activity - Given that the difference - after disabling Witness - was UFS 10m32.10s real 27m1.32s user 7m49.01s sys (Systat 700MB Free) ZFS 17m43.66s real 27m30.70s user 17m28.47s sys (Systat 1,3GB Free) It make me think that ZFS is trading memory for performance - my guess is - that given the same memory usage ZFS would be unbeatable - I must say that Pawel has done a great job porting ZFS > --- > Gary Jennejohn / garyjATjennejohnDOTorg gjATfreebsdDOTorg garyjATdenxDOTde > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >