A Company's Ecommerce Website Is Experiencing Massive Traffic Spikes, Which

question 396

Multiple Choice

A company's ecommerce website is experiencing massive traffic spikes, which are causing performance problems in the company database. Users are reporting that accessing the website takes a long time. A Developer wants to implement a caching layer using Amazon ElastiCache. The website is required to be responsive no matter which product a user views, and the updates to product information and prices must be strongly consistent. Which cache writing policy will satisfy these requirements?

• A) Write to the cache directly and sync the backend at a later time
• B) Write to the backend first and wait for the cache to expire
• C) Write to the cache and the backend at the same time
• D) Write to the backend first and invalidate the cache

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