Date: Tue, 6 Feb 2001 13:06:02 -0800 From: Alfred Perlstein <bright@wintelcom.net> To: Andre Oppermann <oppermann@monzoon.net> Cc: Matt Dillon <dillon@earth.backplane.com>, Rik van Riel <riel@conectiva.com.br>, Mike Silbersack <silby@silby.com>, Poul-Henning Kamp <phk@critter.freebsd.dk>, Charles Randall <crandall@matchlogic.com>, Dan Phoenix <dphoenix@bravenet.com>, Jos Backus <josb@cncdsl.com>, freebsd-hackers@FreeBSD.ORG Subject: Re: soft updates and qmail (RE: qmail IO problems) Message-ID: <20010206130602.X26076@fw.wintelcom.net> In-Reply-To: <3A80650D.9FA0BCDA@monzoon.net>; from oppermann@monzoon.net on Tue, Feb 06, 2001 at 09:56:45PM %2B0100 References: <Pine.LNX.4.21.0102061555550.1535-100000@duckman.distro.conectiva> <3A805035.C71AAD5E@monzoon.net> <200102061943.f16Jhp365113@earth.backplane.com> <3A805938.96ED890D@monzoon.net> <20010206121357.S26076@fw.wintelcom.net> <3A805F53.F5CD60D9@monzoon.net> <20010206124012.V26076@fw.wintelcom.net> <3A80650D.9FA0BCDA@monzoon.net>
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* Andre Oppermann <oppermann@monzoon.net> [010206 12:58] wrote: > Alfred Perlstein wrote: > > > > Basically, you want a fsync right before the IPC. This should > > bring the metadata up to date with what's in-core and you should > > then be safe when you reply with your 250 accepted message. > > Like this (from qmail-queue): > > ... > if (fsync(intdfd) == -1) die_write(); > > if (link(intdfn,todofn) == -1) die(66); > > triggerpull(); > die(0); > } > > Actually for initial queueing it doesn't even unlink() but leaves > it to the next program. Can't be more safe, can it? Only if you don't need the link() to exist after a crash. -- -Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org] "I have the heart of a child; I keep it in a jar on my desk." To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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