From owner-freebsd-current Sat Sep 28 14:57:15 2002 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0BDAE37B401 for ; Sat, 28 Sep 2002 14:57:14 -0700 (PDT) Received: from bingnet2.cc.binghamton.edu (bingnet2.cc.binghamton.edu [128.226.1.18]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6186343E6E for ; Sat, 28 Sep 2002 14:57:13 -0700 (PDT) (envelope-from zzhang@cs.binghamton.edu) Received: from opal (cs.binghamton.edu [128.226.123.101]) by bingnet2.cc.binghamton.edu (8.11.6/8.11.6) with ESMTP id g8SLv9b25640; Sat, 28 Sep 2002 17:57:09 -0400 (EDT) Date: Sat, 28 Sep 2002 17:57:09 -0400 (EDT) From: Zhihui Zhang X-Sender: zzhang@opal To: Claus Assmann Cc: freebsd-current@FreeBSD.ORG Subject: Re: Journaled filesystem in CURRENT In-Reply-To: <20020926204117.A9040@zardoc.esmtp.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Thu, 26 Sep 2002, Claus Assmann wrote: > On Thu, Sep 26, 2002, Zhihui Zhang wrote: > > On Thu, 26 Sep 2002, Claus Assmann wrote: > > > > If someone is interested: > > > http://www.sendmail.org/~ca/email/sm-9-rfh.html > > > > Just as a small data point: I get message acceptance rates of > > > 400msgs/s on a journalling file system (using a "normal" PC) that > > > writes the data into the journal too. AFAICT that's due to the fact > > > that fsync() is much fast for this kind of storage. > > > > > > The important part for mailservers here is the rate at which content > > > files can by safely written to disk. From my limited experience > > > journalling file systems are here much better than softupdates. > > > Can you tell me the approximate sizes of these mails and how they are > > stored? > > The test for sendmail 9 were made with small sizes (1-4KB). They > were stored in flat files using 16 directories. > > The performance tests for sendmail 8 were done with sizes from 1 > to 40 KB, in a single queue directory (AFAIR). Hope I can bother you with two more questions (I know nothing about sendmail beyond its name): (1) Can sendmail be configured to generate automatic messages for the purpose of performance test? (2) Is each mail stored in its own file? Thanks, -Zhihui To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message