What is the difference between cache and persistent storage?

Question

Accepted Answer

Cache is temporary storage used to speed up access to frequently accessed data. Persistent storage is permanent storage used to store data even after power loss.

Cache is faster but smaller than persistent storage
Cache is volatile and data is lost when power is lost
Persistent storage is non-volatile and data is retained even after power loss
Examples of cache include CPU cache, browser cache, and CDN cache
Examples of persistent storage include hard disk drives, solid-state drives, and USB drives

Accepted Answer

cache and persist mean caching the intermediate processed data to reduce the redundancy of the same execution.

cache and persist do the same but cached data cannot be uncached persisted data can be unpersist and it has difrence storage level.

Accepted Answer

Cache and persistent storage are two different types of storage used in computing systems:

Cache:

• Cache is a small, high-speed storage area that is designed to temporarily hold frequently accessed data or instructions.

• Its primary purpose is to improve the performance of a computer or system by reducing the time it takes to access data or instructions that are often used.

• Cache is typically volatile, meaning its contents can be quickly overwritten or lost when the system is powered off or reset.

• There are different levels of cache, such as L1, L2, and L3 caches, each with varying sizes and speeds, and they are located closer to the CPU for faster access.

Persistent Storage:

• Persistent storage refers to non-volatile storage used for long-term data retention. It retains data even when the computer is powered off or restarted.

• Examples of persistent storage devices include hard disk drives (HDDs), solid-state drives (SSDs), optical drives, and flash drives.

• Persistent storage is used to store the operating system, applications, user files, and other data that needs to be preserved across sessions.

• It is slower in terms of access speed compared to cache but provides a much larger storage capacity.

In summary, cache is a small, fast storage used to temporarily hold frequently accessed data to improve system performance, while persistent storage is larger, non-volatile storage used for long-term data retention. They serve different purposes within a computing system, with cache focusing on speed and persistence storage on data preservation.

What is the difference between cache and persistent storage?

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