Date: Mon, 10 Feb 2003 10:23:15 +0100 From: phk@phk.freebsd.dk To: David Schultz <dschultz@uclink.Berkeley.EDU> Cc: arch@FreeBSD.ORG Subject: Re: Our lemming-syncer caught in the act. Message-ID: <37473.1044868995@critter.freebsd.dk> In-Reply-To: Your message of "Mon, 10 Feb 2003 01:13:17 PST." <20030210091317.GD5165@HAL9000.homeunix.com>
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In message <20030210091317.GD5165@HAL9000.homeunix.com>, David Schultz writes: >When a large file times out, a significant amount of I/O can be >generated. This is still far better than the old syncer that >flushed everything every 30 seconds. The reasons for this >behavior are explained in src/sys/ufs/ffs/README. After reading >that, do you still think it makes sense to try to do better? Yes, it makes a lot of sense. There is no point in batching up writes to the point of showing 200 requests off at once then wait 30 seconds, then do it again etc etc. We can and need to do better than that. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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