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Anubhav Sharma
Anubhav Sharma

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The Anubhav portal was launched in March 2015 at the behest of the Hon'ble Prime Minister for retiring government officials to leave a record of their experiences while in Govt service .

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Khushi Singh
Khushi Singh 07 Apr 2025
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In computing operations, cache refers to the practice of saving data into a temporary storage area called a cache, which allows subsequent data requests to complete more rapidly. The primary mission of caching make data retrieval faster by accessing data before its origin point when the original resource requires extra time or significant system resources.

Systems follow a standard caching protocol that initiates with data requests by checking if the data resides within the cache before retrieval. The system grants such requests directly from the cache storage through cache hits. The cache remains empty until the system locates missing data in its source, which includes databases, file systems, or web servers, to later store such information for future retrieval. This process is known as a cache miss.

Several levels make caching possible throughout the system implementation.

  • System memory, referred to as RAM, stores data temporarily to allow quick retrieval from the cache. Memory-based caching serves to store small popular assets, including configuration data as well as session information and demanding database responses.
  • The disk cache enables storing infrequently needed data at lower speeds but with higher storage allocation than the memory cache.
  • Web browsers together with web servers employ caches to store images and stylesheets files and JavaScript files as a way to minimize repetitive server content requests.
  • Distributed Cache enables distributed caching operations through multiple machines, which allows different application sections to retrieve data from separate storage areas.

Benefits of Caching:

  • Speed improvements occur because data that users frequently need exists near their usage points.
  • Reduced Load on Resources: Minimizes the number of requests to slower or more resource-intensive systems like databases and APIs.
  • The operational costs decrease when caching functions are used to eliminate duplicate data calls and lighten demands on primary data sources.

Using caches provides major performance enhancements, but their efficient management becomes necessary to stop serving outdated data from the cache system. The challenges of outdated data from cache are resolved through two cache invalidation methods - time-to-live (TTL) and cache eviction policies.

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