osx - Socket.io: How to handle closing connections? -


i'm trying understand "physical" limits of application.

on client side:

var socket = io.connect("http://127.0.0.1:6701"); socket.on('connect', function() {   socket.disconnect(); }); socket.on('disconnect', function() {   socket.socket.reconnect(); });

on server side:

var io = require('socket.io').listen(6701);  io.sockets.on('connection', function(socket) {    socket.on('disconnect', function(reason) {     var o = object.keys(socket.manager.open).length       , c = object.keys(socket.manager.closed).length       , ca = object.keys(socket.manager.closeda).length       , h = object.keys(socket.manager.handshaken).length        console.log("open: " + o)       console.log("closed: " + c)       console.log("handshaken: " + h)       console.log("closeda: " + ca)       console.log("---");    }); });

when in osx hit file limit (256) statistics following

open: 471 closed: 235 handshaken: 471 closeda: 235

what puzzling me is:

  • if forcefully close connection (this client disconnect(), why i'm still using file handle (so hit file limit) edit: adding delay seems server can keep breath , never reaches file limit)?
  • is there way close socket pretty sure file limit reached (i know can push 65k)?
  • is there way know i'm reaching file limit, can stop accepting connection?

thank you

it's better if client sends "terminate" command server closes connection, other way around.

server wait until timeout before giving on connection. if timeout small, loads of connections coming in, overload it. that's why, example, disable keep-alive on app servers.

delay helps because server has time close connection before opening new one.


Comments

Post a Comment

Popular posts from this blog

c++ - Is it possible to compile a VST on linux? -

for class project i'm attempting write vst plugin backed cuda. current cuda workflow on linux box, i'd prefer compile , link there. according wikipedia , should possible (i couldn't find steinberg documentation relevant linux) can't find makefile or instructions on how build if aren't using xcode or visual studio. i'm vst 3 sdk doesn't support linux. when try compile plugin under linux, error: ./base/source/fatomic.cpp:39:30: fatal error: libkern/osatomic.h: no such file or directory this issue caused following code in "vst3 sdk/base/source/fatomic.cpp" #if mac #include <libkern/osatomic.h> #if mac_os_x_version_min_required > mac_os_x_version_10_4 #define native_atomic_type (volatile int32_t*) #else #define native_atomic_type (int32_t*) #endif #elif windows #include <windows.h> #endif but hope compiling under linux work vst sdk 2.4. reading. jvstwrapper seems run on lin...
Read more

java - Output of Eclipse is rubbish -

i want write program in eclipse language different english. when display output using system.out program, displays output correctly in console editor. when accept input console , output it, output rubbish. how can solve it. many thnaks i'm not sure if problem, have character encoding problem. make sure you're using unicode, utf-8. you can read more @ official docs converting non-unicode text .
Read more

jquery - Confused with JSON data and normal data in Django ajax request -

i read json internet still have not got grasp of it. reading article http://webcloud.se/log/ajax-in-django-with-jquery/ i not understood first part function using json def xhr_test(request, format): if request.is_ajax(): if format == 'xml': mimetype = 'application/xml' if format == 'json': mimetype = 'application/javascript' data = serializers.serialize(format, examplemodel.objects.all()) return httpresponse(data,mimetype) # if want prevent non xhr calls else: return httpresponse(status=400) my main problems are from function getting format variable does format json mean data given function json or data recived json can give me simple example ouput of function data = serializers.serialize(format, examplemodel.objects.all()) how use data when response in jquery function if don't use json in above function how input , response chnage thanks ...
Read more