What is the use of memcache?
Memcached (pronounced variously mem-cash-dee or mem-cashed) is a general-purpose distributed memory-caching system. It is often used to speed up dynamic database-driven websites by caching data and objects in RAM to reduce the number of times an external data source (such as a database or API) must be read.
Is memcache a memory?
Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects) from results of database calls, API calls, or page rendering. Memcached is simple yet powerful. Its simple design promotes quick deployment, ease of development, and solves many problems facing large data caches.
When would you use a distributed cache?
In computing, a distributed cache is an extension of the traditional concept of cache used in a single locale. A distributed cache may span multiple servers so that it can grow in size and in transactional capacity. It is mainly used to store application data residing in database and web session data.
What happens to the data stored in Memcached?
The servers keep the values in RAM; if a server runs out of RAM, it discards the oldest values. Therefore, clients must treat Memcached as a transitory cache; they cannot assume that data stored in Memcached is still there when they need it. The rest of the page on Wikipedia is pretty informative, and it might help you get started.
How to remove a key from cache Memcached?
Returns true if key was found and deleted, and false otherwise. You may also use the alternate method name remove, so Cache::Memcached looks like the Cache::Cache API. Sends a command to the server to atomically increment the value for $key by $value, or by 1 if $value is undefined.
What does the Memcache module do in Drupal?
The Drupal Memcache module provides stampede protection, which helps minimize the overhead of rebuilding cache items during a cache rebuild.
What can be stored in the in memory cache?
The in-memory cache can store any object. The distributed cache interface is limited to byte[] . The in-memory and distributed cache store cache items as key-value pairs.