On Sat, Aug 23, 2014 at 10:09 AM, Ashish <aasheesh4...@gmail.com> wrote: > > This may not be directly related to LIBUV but like to know if at all LIBUV > can help here. > > I read on their blog that whatsapp guys have achieved 2 millions of > concurrent connections to single server (running on FreeBSD): > http://blog.whatsapp.com/170/ONE-MILLION! > http://blog.whatsapp.com/196/1-million-is-so-2011 > > Makes me think FreeBSD kernel supports those many connections (or can be > tweaked). > > Is this possible on Windows server using LIBUV ?
Possibly. A lot depends on the type of traffic and the configuration of the server. I speculate that whatsapp clients are idle most of the time and that perhaps 1% is active at any one time. So, with 2 million clients, that means you have 2e6 * 0.01 = 20,000 clients that actually require the program or the operating system do to anything in a given unit of time. The numbers are made out of whole cloth, of course, but the point is that their clients are zero cost most of the time. My Core i7 can execute 10 billion instructions per second per core without breaking a sweat. Let's assume half of that is wasted on overhead (scheduling, bookkeeping, hardware interrupts, etc.) That still leaves you with 1e10 / 2 / 2e4 = 250,000 instructions/sec per client - and that's when running on a single i7 core. I will bet good money that whatsapp a) employs beefier hardware, and b) fully exploits every core in their systems. -- You received this message because you are subscribed to the Google Groups "libuv" group. To unsubscribe from this group and stop receiving emails from it, send an email to libuv+unsubscr...@googlegroups.com. To post to this group, send email to libuv@googlegroups.com. Visit this group at http://groups.google.com/group/libuv. For more options, visit https://groups.google.com/d/optout.
