Memcached and Need of Memcached

 Caching: -

Whenever any user opens website to land on website. Their web browsers sends request for the page to server. The requested server then processes this request and compiles the webpage and sends back to the web browser. If your website is receiving low web traffic, your server will process each request without having noticeable impact. Caching is a process of constantly-accessing data in temporary cache. Every time visitor requests this data, it will served from cache rather than server. If the data is not cached, the request will sent to the server. However, on way back to web browser. A copy of data will be stored in cache. It ensure that cached copy is available. Caching can boost your website performance even in heavy traffic. This makes website easier to scale and handle unexpected spikes.

Caching helps in providing better visitor experience by delivering content faster. Since many visitors are having positive experience on website. They will take positive actions. Such as – following company on social media networks, subscribe to newsletter. It will hopefully boost your revenue and conversions.

Introduction of Memcached: -

Memcached is an open source persistent object tool. Memcached stores objects to reuse between web page loads. Memcached keeps data in RAM (real access memory) which reduces numerous times the database to read.

Memcached Solutions: -

Memcached belongs to NoSQL family of data management solutions. It stores all data based key-value pairs. It includes API calls and database calls. Memcached is particularly useful when same piece of data requested periodically. Memcached can deliver significant performance when cost of content is high.

Memcached object caching solution working: -

• Memcached uses client-server architecture on four components. The first component is client-server that retains list of available memcached servers.

• Whenever client receives query, it will first check whether data exists in cache. If data is already available. Memcached will return to client without interrupting database. If data isn’t cached, Memcached forwards request to database.

• To help in distributing load, typically Memcached implementation consists of different server and its clients. It uses client-based hashing algorithm to match each request to appropriate server.

• Memcached server software stores key/ value combinations for numerous factors. It includes API calls, web page rendering and results of database calls.

• Lastly Memcached uses least recently used LRU algorithm. This algorithm helps prevent cache from growing indefinitely by finding least recently used objects.

• LRU works on linked list.  Whenever a list entry is accessed and updated. It gets removed from list and attacked to list head. This means entries at bottom of list are less recently used than at the top of list. Whenever it needs to reuse memory. It will remove entries from bottom of the list.

In more simple way, memcached stores results of database query. This results whenever same query is requested, memcached will response without requesting to process. At HTS Hosting we offer all hosting plans works with memcached technology. Our plans are Linux shared web hosting, Linux Dedicated Hosting, windows dedicated hosting and other hosting plans.

Source:https://www.htshosting.org/knowledge-base/technology/90/memcached-and-need-of-memcached