dns lookup script

Refer:Http://developer.yahoo.com/performance/rules.html#dns_lookups   DNSJust like the phone book, search for the specified website'sIPAddress. Search onceDNSGenerally20-120Milliseconds.   The Domain Name System (DNS) maps hostnames to IPAddresses,

Analysis on DNS caching in Nodejs and nodejsdns Cache I accidentally saw an article about sending http requests under nodejs without caching dns results. This means that if you write an http collection program based on nodejs and do not provide dns

function Installdns{Servermanagercmd-q c:\role.xml| Out-null$xml =[xml] (get-content c:\role.xml)$dnsrole = $xml. Servermanagerconfigurationquery.role|where{$_.id-eq "DNS"}if ($dnsrole. Installed-eq $false){Servermanagercmd-i $dnsrole. Id}Else{write-

Accidentally saw an article about Nodejs sending an HTTP request does not cache DNS results. This means that if you write an HTTP capture program based on Nodejs, not providing DNS caching will allow each request to be silly repeatedly resolved

Sometimes in order to test the network situation, you need to return to each phase of time, such as time-consuming DNS resolution, to establish a connection to the time spent, from the establishment of the connection to prepare the transfer of the

Sometimes in order to test the network situation, it takes time to return each phase, such as DNS resolution, time spent establishing a connection, the time it took to establish a connection to the preparation of a transmission, the time spent

Reprint: http://blog.csdn.net/wangjingfei/article/details/5283632/It is very convenient to be familiar with Ifconfig.ifconfig eth0 New IPThen edit/etc/sysconfig/network-scripts/ifcfg-eth0, modify IPFirst, modify the IP address[Email protected]

Http://developer.yahoo.com/performance/rules.html Yahoo! The predictional performance team brings best practices to improve web performance. They conducted a series of experiments, developed various tools, wrote a lot of articles and blogs, and

Yahoo! The predictional performance team brings best practices to improve web performance. They conducted a series of experiments, developed various tools, wrote a lot of articles and blogs, and participated in discussions at various meetings. The

Yahoo! The predictional performance team brings best practices to improve web performance. They conducted a series of experiments, developed various tools, and wrote a lotArticleAnd blogs and participate in discussions at various meetings. The core