Which ONTAP capability would you enable to guarantee performance for mission-critical workloads?

• A. Flash Cache
• B. FlexCache
• C. Quality of Service (QoS)
• D. Flash Pool

Answer: (C)

Quality of Service (QoS) in ONTAP provides the ability to carve out and enforce performance targets for storage objects. By applying QoS policies to volumes or qtrees, you can specify minimum IOPS and/or throughput (and set caps to prevent other workloads from starving resources). This creates a predictable, guaranteed level of performance for mission-critical workloads, even in mixed-use environments.

Flash Cache improves read performance by caching hot data, but it does not offer a formal performance guarantee. FlexCache caches data at remote sites to speed up reads across locations, again without a guaranteed SLA. Flash Pool combines SSDs and HDDs to improve overall performance through caching and auto-tiering, but it does not provide an explicit performance guarantee either.