A systems administrator is provisioning storage for a new server that will function as a cache for a popular content delivery network (CDN). The server is expected to handle a very high volume of read requests for static assets, with writes occurring only infrequently when the cache is updated. Which of the following storage types provides the best balance of performance, endurance, and cost for this specific workload?
The correct choice is a read-intensive (RI) SSD. This type of drive is optimized for workloads with a high ratio of read-to-write operations, such as a CDN cache. RI SSDs provide excellent read performance at a lower cost compared to other SSD types because they have lower write endurance, which is not a limiting factor in this scenario. Write-intensive (WI) and mixed-use (MU) SSDs are designed for environments with significantly more write operations and have higher endurance, making them unnecessarily expensive for this use case. A 15,000 RPM SAS HDD, while a high-performance mechanical drive, cannot match the low latency and high random read IOPS of an SSD, making it a poor choice for a performance-critical caching application.
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What is an RI SSD and how does it differ from other SSD types?
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Why is a 15,000 RPM SAS HDD not sufficient for read-intensive workloads?
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How does endurance influence the cost of WI and MU SSDs?
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What is a read-intensive SSD, and why is it suited for high read workloads?
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Why are write-intensive and mixed-use SSDs not suitable for CDN caching?
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How do 15,000 RPM SAS HDDs compare to SSDs for caching applications?