What is varnish and Memcached?

What is varnish and Memcached?

Memcached can be used as an in-memory, distributed back-end for your application cache. Varnish can be used as a reverse proxy to externally cache HTTP requests. Varnish is in front of the webserver; it works as a reverse http proxy that caches. You can use both.

What does Varnish server do?

Varnish Cache is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. Varnish Cache is really, really fast. It typically speeds up delivery with a factor of 300 – 1000x, depending on your architecture.

What is varnish technology?

Varnish is an HTTP accelerator designed for content-heavy dynamic web sites as well as APIs. In contrast to other web accelerators, such as Squid, which began life as a client-side cache, or Apache and nginx, which are primarily origin servers, Varnish was designed as an HTTP accelerator.

What is varnish plugin?

Varnish acts as a cache HTTP reverse proxy and sometimes you can also see it defined as a front-end accelerator. It’s not a stand-alone solution, because it needs a dedicated web server to rely on, like NGINX or Apache.

Is memcache faster than Redis?

Redis uses a single core and shows better performance than Memcached in storing small datasets when measured in terms of cores. Memcached implements a multi-threaded architecture by utilizing multiple cores. Therefore, for storing larger datasets, Memcached can perform better than Redis.

Should I use Memcache or Redis?

Choosing between Redis and Memcached. Redis and Memcached are popular, open-source, in-memory data stores. Memcached is designed for simplicity while Redis offers a rich set of features that make it effective for a wide range of use cases.

How do I know if Varnish Cache is working?

Open your browser’s developer tools. Switch to the network view (where you should be able to inspect each network request) Inspect the headers of the request you want to check X-Varnish and X-Cache for (probably just the / or index page)..

Which is better memcached or varnish for caching?

Memcache is a back-end caching server while varnish is a front-end caching server. 3. Redis “Memcached is sometimes more efficient, but Redis is almost always the better choice.” Redis is also an in-memory caching server works pretty much similar to the Memcached.

How does varnish work as a web caching server?

Varnish is present in front of your main server. So every request firstly processed by varnish instead of your web server. And if it found corresponding content on varnish cache it will not let the request to bother your main web server and serve the content itself.

Where can I find the Varnish cache logfiles?

You can access the varnish-cache homepages with HTTP or HTTPS as you like. We save the logfiles from our Varnish instance for a limited period, in order to be able to debug problems. We do not use any external trackers and do not analyze traffic.

When to upgrade to Varnish cache 6.0 LTS?

It was first released in September 2015, and now is the time for users to start upgrading to Varnish 6.0 LTS. If you are still using Varnish 4.1, you should be able to migrate to 6.0 without touching your VCL. In our experience so far, upgrading is very straightforward. Read more about upgrading and what’s new in Varnish Cache 6.0.