From owner-freebsd-hackers Wed Aug 9 3:36:47 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from guardian.hermes.si (guardian.hermes.si [193.77.5.150]) by hub.freebsd.org (Postfix) with ESMTP id A295537B75D for ; Wed, 9 Aug 2000 03:36:36 -0700 (PDT) (envelope-from mitja@hermes.si) Received: from hermes.si (primus.hermes.si [193.77.5.98]) by guardian.hermes.si (8.9.3/8.9.3) with ESMTP id MAA22273; Wed, 9 Aug 2000 12:36:21 +0200 (METDST) Received: (from uucp@localhost) by hermes.si (8.9.3/8.9.3) id MAA25602; Wed, 9 Aug 2000 12:36:20 +0200 Received: from akira.hermes.si(10.17.1.122) by primus.hermes.si via smap (V2.1) id xma024999; Wed, 9 Aug 00 12:35:17 +0200 Received: from lamu.hermes.si (lamu.hermes.si [10.17.1.230]) by akira.hermes.si with ESMTP (8.8.6 (PHNE_17135)/8.7.1) id MAA03452; Wed, 9 Aug 2000 12:38:28 +0200 (METDST) Message-Id: <200008091038.MAA03452@akira.hermes.si> Date: Wed, 09 Aug 2000 12:35:11 CEST From: Mitja Horvat To: void , Mitja Horvat Cc: freebsd-hackers@freebsd.org Subject: Re: 4.1-RELEASE problem writing to async mounted filesystem Reply-To: mitja.horvat@hermes.si X-Mailer: Spruce 0.6.5 for X11 w/smtpio 0.7.9 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Hi, > > There's no reason to use softupdates and async together. SU gets you > the same benefits, but much more safely. You are right... I thought async was only for data updates, not metadata too... Thanks for clearing this out... As I understand SU, it's just a method to do metadata asynchronously in a safe way, so using noasync with SU does still have a point? > > This does not happen if the fs is mounted synchronously, but I also get > > MUCH slower IO > > throughput(800kb/s compared to 12MB/s with async). > > Mounted sync or noasync? They're not the same thing. > It was mounted async. I mounted it noasync and it behaves much better... It's not as responsive as when mounted sync, but the throughput is 12MB/s. Thank you for your help, Mitja To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message