Cache and it’s necessities:
Cache is a collection of data that is duplicated from main data and it’s used when the fastest speed and least time of reaching is required. In other words, cache is a temporary storage space for data that is used by system in order to store there in a faster accessible way. And when system needs, we don’t need to process the information.
There is a similar technique for storing the internet content which is implemented by the cache server. In this technique if the requested content from user is present on the cache server, it will be read by the cache server instead of receiving it from web server or internet.
Using cache has a lot of advantages for an internet server that is mentioned briefly in the followings:
- Decreasing delays
By using cache, it’s required less time, instead of using the internet web server; Because the cache server is placed near to the client (eg, in ISPs).
- Reduce bandwidth usage
Ability to respond to requests from internal sources, eliminates your need to submit requests on the Internet link and as a result, bandwidth savings will increase for the provider.
- Decreasing of provider costs
Increasing bandwidth cause the increasing of needed hardware including radio links or transmission equipment that can lead to more CAPEX costs.
Due to the reduction in bandwidth consumption, the possibility of adding the user is growing more and the concern about the lack of bandwidth will increase users and consequently, increased discontent among network users.
- Increase of user satisfaction and decrease of dispensing
According to research, we conclude that when the network is equipped with cache and possessing bandwidth save, there will be a bandwidth which cuts the expenses accordingly.