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What is Cache? This is the Definition, Function, and How Cache Works

Understanding Cache
Cache is a high-speed temporary data storage method for storing frequently accessed data for quick access. Cache is found at the hardware and software levels. An example at the hardware level is the cache on the processor, namely L1, L2, and L3, while at the software level there is a browser system that we often use to surf the internet.

Cache Function
Cache serves as a temporary data storage area that is frequently accessed so that it can be accessed again quickly when needed.

How Cache Works
Cache has two types of operations, namely read and write. In read mode, when the cache finds data at the top or cache hits, the system returns the data and the operation is complete. Conversely, if it is not found, the cache will read the data below it again. In write mode, the cache will write data in the top memory that has not been used.

Advantages of Cache

Faster Access
Cache memory access is usually faster than main memory.

Usually Small
The data stored in the cache is usually not too large because it only stores frequently used data.

Lack of Cache

Limited Capacity
Cache capacity is limited, especially on processors which are currently only capable of storing less than 20 MB of cache.

Expensive Hardware
Hardware for this cache system is expensive so it is not effective if it is used to store large data.

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