snmp polling

Just network about polling knowledge, must get their own here to do a backup!In fact, before using Ajax polling to do a timely update of data, just did not know that is polling.First of all, when do we think of using polling technology?In general, the most is timely information updates, such as a mall activity, the number of participants in real-time updates, but

Long polling, long polling for WEB communicationLong-time connection based on HTTP is a technology of "server push" through long polling, which makes up the insufficiency of HTTP simple request answering mode, and greatly enhances the real and interactive of the program.First, what is long connection, long polling?

Long-time connection based on HTTP is a technology of "server push" through long polling, which makes up the insufficiency of HTTP simple request answering mode, and greatly enhances the real and interactive of the program.First, what is long connection, long polling? In plain terms, the client is constantly sending requests to the server to get the latest data. The "Stop" here actually has a stop,

Http://www.cnblogs.com/hoojo/p/longPolling_comet_jquery_iframe_ajax.htmlLong-time connection based on HTTP is a technology of "server push" through long polling, which makes up the insufficiency of HTTP simple request answering mode, and greatly enhances the real and interactive of the program.First, what is long connection, long polling? In plain terms, the client is constantly sending requests to

Long-time connection based on HTTP is a technology of "server push" through long polling, which makes up the insufficiency of HTTP simple request answering mode, and greatly enhances the real and interactive of the program. First, what is long connection, long polling? In plain terms, the client is constantly sending requests to the server to get the latest data. The "Stop" here actually has a sto

Web SocketApplication scenario: Instant Messaging: Stock market analysis, chat rooms, online games, etc., instead of polling and long pollingPolling Polling is at a specific time interval (such as every 1 seconds), the browser sends an HTTP request to the server, and then the server returns the latest data to the client's browser. This traditional HTTP request pattern has obvious drawbacks – the br

of the fields corresponding to the connection is keep-live, which appears in the HTTP response header, and his format is timeout=30, max=5, timeout is two times HTTP request retention time (s), and Max is this TCP connection up to a few HTTP request Reuse http long polling: HTTP long polling is the server received the request, if there is data, immediately respond to the request; If there is no data will b

Citation: http://www.cnblogs.com/AloneSword/p/3517463.htmlHttp://www.cnblogs.com/wei2yi/archive/2011/03/23/1992830.htmlcode example:1.iframe for long connections@ Page Language="Java"ContentType="text/html; charset=gb18030"pageencoding="GB18030"%>DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd ">HTML>Head>Metahttp-equiv= "Content-type"content= "text/html; charset=gb18030">title>Insert Title heretitle>Head>Scripttype= "Text/javascript"src= "Jquer

Polling : The client periodically sends an AJAX request to the server, returning the response information and closing the connection as soon as the server receives the request.Pros: It's easier to write back-end programs.Cons: Half of the requests are useless, wasting bandwidth and server resources.Example: suitable for small applications. Long Polling: The client sends an AJAX request to the server, th

Nginx access log polling and nginx log polling Nginx access log polling and cutting script 1 #!/bin/sh 2 Dateformat=`date +%Y%m%d` 3 Basedir="/application/nginx" 4 Nginxlogdir="$Basedir/logs" 5 Logname="access_www" 6 [ -d $Nginxlogdir ] cd $Nginxlogdir||exit 1 7 [ -f ${Logname}.log ]||exit 1 8 /bin/mv ${Logname}.log ${Dateformat}_${Logname}.log 9 /bin/mv acces

Do you use polling or long polling for small push applications in the station's message/messaging function?

shutdown policies, specific application scenarios with specific strategies, no perfect choice, only the right choiceApplication Scenario Differences:1. General long connection (the pursuit of real-time high scene) for a few client-end to server-end frequent communication , for example: Database connection with long connection, if with short connection frequent communication will cause socket error, and frequent socket Creation is also a waste of resources.2. HTTP services like Web sites typical

According to a recent study on the best application-layer protocol approach in mobile Internet with Chinese characteristics, 54chen has made an in-depth investigation on the history of various terms, special record for differentiation. HTTP protocol history The first HTTP protocol was born in March 1989. The first HTTP Protocol version is HTTP 0.9, which is extremely simple because it only allows the client to send the GET request. The second version of HTTP protocol is HTTP

First, install SNMP1.1, download the source code of NET-SNMPSelect an SNMP version, such as 5.7.1, as follows: HTTP://SOURCEFORGE.NET/PROJECTS/NET-SNMP/FILES/NET-SNMP/5.7.1/, as shown in:　　　　After the download is complete, get a compressed package as shown　　1.2. Transfer the compressed package to a remote Linux serverTransfer compressed packets to a remote Linux

I have read many posts on so and the web regarding the keywords in my question title and learned a lot from them. Some of the questions I read is related to specific implementation challenges while others focus on general concepts. I just want to make sure I understood all of the concepts and the reasoning why technology X is invented over technology Y and so on. So here goes:Http Polling: Basically AJAX, using XMLHttpRequest.Http Long