Date: Mon, 19 Aug 1996 15:26:14 -0700 From: David Greenman <dg@root.com> To: Tim Vanderhoek <hoek@freenet.hamilton.on.ca> Cc: Hal Snyder <hal@post.vale.com>, "'freebsd-chat@freebsd.org'" <freebsd-chat@freebsd.org> Subject: Re: Microsoft's overwhelmed FTP servers Message-ID: <199608192226.PAA22381@root.com> In-Reply-To: Your message of "Mon, 19 Aug 1996 17:20:31 EDT." <Pine.SOL.3.91.960819171431.28324A-100000@james.freenet.hamilton.on.ca>
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>> I remember around the time Quake came out someone (David Greenman?) posted >> some impressive numbers. > >I believe it was 112MB transferred in one day. Had it been one 24-hour >period, the numbers might well be even higher. I think you're right, and >that was just after Quake came out and after a bug in wcarchives ftpd had >been fixed that effectively allowed unlimited users on at a time. > >If noone else's saved the numbers, I've still got them in my INBOX, but >I'm sure David Greenman has them, too. Plus much more current ones that >include the load on the machine at the time, perhaps. I guess it's time for me to say something. The current 24 hour record (3am-3am) is 115GB which was set on August 10th. A new version of Linux Slackware was released around then. The totals were: Archive Name Bytes Transfered Files Transfered % Bytes %Files ------------ ---------------- ---------------- ------- ------ ... Total 115,746,632 K 459,339 100.0 100.0 459339 files/day is an _average_ of 19139 files per hour, or 5.316 files per second. 115GB/day is an average of 4.823GB/hour or about 1.34MB/sec. The actual peaks are about twice this and would have been sustained through most of the daytime hours (roughly 2.5MB/sec). I should point out that the machine still could have done more than this if the load had stayed as high through the early morning hours as it did during the daytime. I should also point out that wcarchive currently has only a 150Mhz P6 and that this is with FreeBSD 2.1.5. We have made major performance improvements since then (many of which have been inspired from things learned from wcarchive). Some estimates indicate that wcarchive may see as much as a 50% reduction in CPU time given the same load under FreeBSD 2.2...and we're still working on more improvements. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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