Date: Mon, 10 Feb 2003 11:01:45 +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: <37779.1044871305@critter.freebsd.dk> In-Reply-To: Your message of "Mon, 10 Feb 2003 01:50:40 PST." <20030210095040.GB5515@HAL9000.homeunix.com>
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In message <20030210095040.GB5515@HAL9000.homeunix.com>, David Schultz writes: >Thus spake phk@phk.freebsd.dk <phk@phk.freebsd.dk>: >> 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. > >It sounds like you're describing the old syncer. The new one >still shoves groups of buffers out at once, but on a file-by-file >basis rather than globally every 30 seconds. The plot is a short segment of a trace I made on a -current box yesterday and it shows actual performance of our current syncer(s). -- 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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