Ran the official installation instructions: curl -sL | sudo -E bash.
NODEJS CACHE UPGRADE
In case of successful caching, no traffic should be observed from the application.Trying to upgrade nodejs on ubuntu 20.10. in order of 1 msec or even 0 msec.įor example executing dig gives me following output: dig If you are using the DNS caching resolver such as dnsmasq or unbound, the result of DNS query should be very fast i.e.
NODEJS CACHE HOW TO
There are many DNS caching resolvers available such as: Bind, dnsmasq and unbound How to check if DNS cache is working This is my preferred way as your application does not have to worry about caching as it is done automatically by OS for you. Second way is to cache the results of queries at OS level. var dns = require ( ' dns ' ), dnscache = require ( ' dnscache ' )() The goal of this module is to cache the most used/most recent dns calls, to avoid the network delay and improve the performance. It is very similar to GOF Proxy design pattern providing a Cache Proxy.
NODEJS CACHE INSTALL
Once this module is installed via npm install dnscache, every call to a dns method is first looked into the local cache, in case of cache hit the value from cache is returned, in case of cache miss the original dns call is made and the return value is cached in the local cache.
One way could be to use a caching DNS library for Node such as DnsCache. In our application, we saw the number of HTTP requests jump from 35 to 2500 per seconds which is an almost 100x factor. Caching the results of DNS queries is one of the important things and can dramatically improve the speed and scalability of your application. I recently discovered in one of my projects that results of DNS are not cached by NodeJs.