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What's The World Record For Maximum Simultaneous Connections?

Posted by Cliff on 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.

17 comments

  1. Obvious way to test. by TheTomcat · · Score: 3

    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.

    1. Re:Obvious way to test. by billcopc · · Score: 1

      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.

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      -Billco, Fnarg.com
  2. Talk about HUGE! by TheCorporal · · Score: 1

    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...

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    "On weekends, to let off steam, I participate in full-contact origami."
    1. Re:Talk about HUGE! by turbo(mx) · · Score: 1

      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?

  3. And the world record is... by Anonymous Coward · · Score: 1

    65,535 simultaneous open sockets.

    Having an upper bound is always great, because you know when you can stop trying.

    1. Re:And the world record is... by tmontes · · Score: 2

      65,535 simultaneous open sockets.

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

    2. Re:And the world record is... by AtrN · · Score: 1

      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...

    3. Re:And the world record is... by elving · · Score: 1

      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.

  4. May be Walnut Creek (cdrom.com) by barzok · · Score: 1

    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).

  5. In related news by drix · · Score: 2

    Anyone interested in this might want to check out a prior /. article entitled "Longest Open TCP Connection?".

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  6. Once I worked at a major Internet router by The+Unconquered+One · · Score: 1

    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!

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    It's not cool to use other peoples code... -
    1. Re:Once I worked at a major Internet router by matthewg · · Score: 2

      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.

  7. They'd have to change the configuration to try it by Johnboy · · Score: 1

    The number of simultaneous connections at cdrom.com is normally capped at 6000.

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    -- Liquor up front, poker in the rear.
  8. Speaking of which by Jedi+Binglebop · · Score: 1

    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.

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    "I love deadlines. I love the "whooshing" sound they make as they pass by." - Douglas Adams.

    1. Re:Speaking of which by lizrd · · Score: 2

      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?"
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  9. Re:You know... by willis · · Score: 1

    it'd probably change so often it wouldn't be worth it.

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    there is no thing
    what else could you want?
  10. From what I understand by LordOfYourPants · · Score: 1

    The record is 90,120+/- 3 connections. This was measured in litres.