Grokking the System Design Interview
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Read-Through vs Write-Through Cache

Read-through and write-through caching are two caching strategies used to manage how data is synchronized between a cache and a primary storage system. They play crucial roles in system performance optimization, especially in applications where data access speed is critical.

Read-Through Cache

  • Definition: In a read-through cache, data is loaded into the cache on demand, typically when a read request occurs for data that is not already in the cache.
  • Process:
    • When a read request is made, the cache first checks if the data is available (cache hit).

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