Many people may encounter this situation, sometimes visited the site is now suddenly unable to find the server, this is why? This is the impact of the DNS cache, because after the first visit to the Web site will have a certain amount of time after
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
This article illustrates the Java implementation method to clean up DNS cache. Share to everyone for your reference. The specific analysis is as follows:
First, test environment
Os:windows7 x64
Jdk:1.6.0_45
Second, I found four ways to clean up
1, the role of Ipconfig/flushdns
Ipconfig/flushdns This is used to clear the DNS cache. When accessing a Web site, the system will read the IP address of the domain name from the DNS cache, and find the Hosts file in the system when it is not found,
Sometimes you may encounter such a situation, the computer suddenly can not be on the net, or there are some sites could not open the situation, but other sites may open. A lot of this is due to DNS cache latency.
Using commands to clean up DNS
1. First, we also press the Win7 flagship computer keyboard Win+r shortcut to open the computer's running window, in the open running window, we enter CMD and click Enter, so you can open the Win7 flagship computer command Prompt window.
2. In
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 when we use a computer, we find that the network suddenly becomes slow, and we may clean up the DNS cache, but we find that the DNS cache is not clean, so what if your computer is a Win7 system and cannot clear the DNS cache? Do not
Ubuntu clears dns cache. if nscd exists in the system, sudo/etc/init directly. d/nscdrestart: it doesn't matter if it doesn't. most of the methods accepted on the Internet are sudoaptitudeinstallnscdsudo/etc/init. d/nscdrestart, we can also directly
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