Date: Sun, 29 Dec 1996 11:47:11 -0500 From: dennis <dennis@etinc.com> To: Peter Carah <pete@news.interworld.net> Cc: isp@freebsd.org Subject: Re: Bandwidth.. Message-ID: <3.0.32.19961229114708.00690ff8@etinc.com>
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At 03:36 PM 12/28/96 -0800, Peter Carah wrote: >In article <Pine.BSF.3.91.961222100130.229S-100000@panda.hilink.com.au> you write: > >>Three separate questions here: >>Q1: how many virtual IPs can you put on a FreeBSD box? >>A1: More than 5,000 (that is as high as anyone has bothered to test.) >Wow. I'd heard of 400-500... Our max is about 50 so far. > >>Q2: What load can a P133/64MB cope with? >>A2: Well, other significant factors are disk type/speed and CPU L2 cache >> size. However, a 486-66 can sustain a load of about 5 conn/sec, so >> you are really looking at > 10 conn/sec, 600 conn/min, 36,000 conn/hour. > >>Q3: What load can a 128kbps ISDN ? >>A3: 128kbps == 16kBytes/sec. Since the average Web document is about >> 15kBytes, you should be able to sustain a load of 1 conn/sec. >Our files are mostly shorter so you get a few more hits. > >>Note that the capabilities of the P133 are *much* greater than the 128k link. > >Amen... You really only need the pentium if you're running news or if >there are some database cgi's. That's even true on T1's, though it >is getting closer. I don't know how the kernel ip lookup is for virt >hosts; if you get too many there may be a time sink in the packet interrupt >handler. On the other hand, pentia are cheap enough and it never hurts >to have too much power... > >>Most of my customers' virtual servers get between 5,000 and 30,000 >>connections per month: less than 100 per hour. > >One server I deal with is a P120 with 32mb; it has 1.2mil hits in december so >far, with only 3 virt hosts out of 47 over 100k (and only 4 more over 10k; >most sites are very little visited) The biggest comes to 15k/day or >about 1 every 4 or 5 seconds. > >1.2e6/(30*86400) = about 1 every 2 seconds overall. Of course, this >load is really *very* bursty so the average means nothing; the big site is >sending very little text and lots of small pictures (no, it isn't an >"adult" site; it's mostly in a language with a non-roman alphabet so >everything has to be sent as graphics). > >This machine runs anon ftp too with about 1.5-3k hits/day of 1/2 meg >average. > >Right now, top shows 100% idle with 17m memory active... The argument for a high speed pentium is much the same as the V8 vs 4cyl one. Both will get you there without much problem, but when you need that "extra power" its nice....if you can afford it. Dennis
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