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What's The World Record For Maximum Simultaneous Connections? 17

Posted by Cliff from the my-server-can-handle-more-sockets-than-yours dept.
epiphani asks: "Recently a DALnet server, twisted.dal.net broke an IRC record for maximum simultanious connections at 33,829. As part of the DALnet coding team (the creators of Bahamut, DALnet's ircd), I am curious if that is a world record for open sockets in a production environment. Would anyone know if this is the case? Also, the machine is an Athlon 900 running Debian. I cant say I am a Linux fan, but the arguement regarding Linux vs *BSD in socket handling is quite moot at this point as they appear to perform at roughly the same level." Man, that's a lot of open sockets. I don't know if Ripley's tracks this kind of information, but it would be interesting to know if this number beats anything you folks have seen.
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What's The World Record For Maximum Simultaneous Connections? More

What's The World Record For Maximum Simultaneous Connections?

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  • Obvious way to test. (Score:3)

    by TheTomcat ( 53158 ) on Monday January 22, 2001 @02:36PM (#490121) Homepage
    Post a link to Natalie Portman, naked and petrified, pouring hot grits all over herself on the front page of slashdot.
    (We _are_ still into her, right?)

    That's SURE to generate more than 34000 hits at once.

    For the humour-impaired: this is a joke.
  • Man, now thats one load of connections they got there! *dr evil* 1 billion connections *dr evil*

    Heh but really, with a simple Athlon900 handling that many connections (albiet simple ones) I would have to agree that the whole debate about BSD handling more is pretty useless.

    I do remember reading earlier that the FTP CDROM.com people had done extensive testing on their extremely popular download server. I think its some Xeon with like 4 gigs of ram and some huge HD, but the important thing is that it runs on FreeBSD. Apparently they did tests and Linux did not handle a huge amount of FTP connections very well as compared to FreeBSD. Hmm, just food for thought I guess...

  • And the world record is... (Score:1)

    by Anonymous Coward
    65,535 simultaneous open sockets.

    Having an upper bound is always great, because you know when you can stop trying.
  • 65,535 simultaneous open sockets.

    ...per IP address on the system ! Be it associated with a physical network interface or a logical one !

  • cdrom.com used to have (may still) have the record for most data throughput in a day. They may also have a record for most connections (you'd almost have to, unles you've got real big files people are getting).
  • Anyone interested in this might want to check out a prior /. article entitled "Longest Open TCP Connection? [slashdot.org]".

    --
  • Many people do not realize the Internet's foundation relys heavily on a small number of routers located throughout the world. One such router (I am not at liberty to give details) I was assigned the task of maintaining. As most of you know, the connectionless UDP protocol is used with DNS and ARP to avoid the overhead of setting up a virtual tunnel, sending a small bit of data, and destroying it. However, my boss accidently typed "tcp" rather than "udp". You can't imagine how many connections we had in a matter of minutes!
  • Store is always your limit. E.g, we can't sample the universe at an arbitary level of detail, not enough atoms to store the information about the atoms storing the information...
  • The number of simultaneous connections at cdrom.com is normally capped at 6000.

  • Further, you do not need a unique port per TCP socket. A TCP connection is uniquely identified by the (source IP, source port, destination IP, destination port) 4-tuple.
  • You know, I've been joking around with that naked and petrified crap for a while, but the way you put it just makes it kinda tempting =) It would be a sure way to gather visitors to my lame-excuse-for-a-not-yet-finished-forum-site.
  • On a completely unrelated topic, I was logged onto a unix server 96 times at my old university. I was just trying to work out how many simultaneous connections 1 person could have. It's amazing how easy it is to abuse official privilages when they are thrust upon you.
  • it'd probably change so often it wouldn't be worth it.

  • ARP doesn't use UDP. ARP operates between layer 2 (data link layer, such as ethernet) and layer 3 (network layer, in this case IP.) UDP is a layer 4 (transport) protocol.
  • The record is 90,120+/- 3 connections. This was measured in litres.
  • I did that once. The sysadmin starred my password. At that time we had to dial into the modem server and telnet from there to get a shell prompt, so I wrote a eudora script to get me to a shell prompt and then download my mail from there. Seems that I had a little bug in the script that caused it to keep attempting to log into the mail server. I forget how many times I ended up being logged in, but I do remember the sysadmin showing me the printout of the log and yelling "Do you know what this is?"
    _____________
  • ftp.cdrom.com, as many archives, has an arbitrary limit. There is a lot I not connect to cdrom, but It has used to be 500 connections. And yes, Linux performed bad by then. But there are a lot of improvement since linux-1.0. Now, Linux-2.x can fill an 100Mbps link, but BSD can not (maybe now). But... who can pay for a 100Mbps link?

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