From owner-freebsd-questions Thu Feb 12 12:40:32 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id MAA25767 for questions-outgoing; Thu, 12 Feb 1998 12:40:32 -0800 (PST) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from alpo.whistle.com (alpo.whistle.com [207.76.204.38]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id MAA25761 for ; Thu, 12 Feb 1998 12:40:28 -0800 (PST) (envelope-from julian@whistle.com) Received: (from daemon@localhost) by alpo.whistle.com (8.8.5/8.8.5) id MAA27532; Thu, 12 Feb 1998 12:36:43 -0800 (PST) Received: from UNKNOWN(), claiming to be "current1.whistle.com" via SMTP by alpo.whistle.com, id smtpd027530; Thu Feb 12 12:36:42 1998 Message-ID: <34E35C77.59E2B600@whistle.com> Date: Thu, 12 Feb 1998 12:32:55 -0800 From: Julian Elischer Organization: Whistle Communications X-Mailer: Mozilla 3.0Gold (X11; I; FreeBSD 2.2.5-RELEASE i386) MIME-Version: 1.0 To: Konrad Heuer CC: Vincent Defert , freebsd-questions@FreeBSD.ORG Subject: Re: FreeBSD vs Linux References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG The soft-update code we are testing addresses this problem. It uses a syncer similar to linux's and does 99.9% of all writes async, but with a guarantee of write order, calculated at run-time through dependancy graphs.. we're just shaking out some minor bugs in it but it's rock solid at the moment. Konrad Heuer wrote: > > > 3. Since the Linux 2nd Extended File Systems by default also buffers inode > and comparable data it's faster in operations like unpacking tar files. > With some risk one can mount a FreeBSD Fast File System with an async > option but then the dirty buffers containing critical data will be flushed > only in 30 second intervals. Linux runs a special bdflush daemon with a 5 > second interval for critical data which is more reliable. > On the other hand I found the sequential writes and (much more important) > reads of larger files are about 30%..50% faster with FreeBSD and the FFS. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe questions" in the body of the message