Which statement about FlexCache data population is correct?

Which statement about FlexCache data population is correct?

• A. FlexCache pre-populates all data from the origin.
• B. FlexCache caches only metadata.
• C. FlexCache does not cache anything; all reads go to origin.
• D. FlexCache uses on-demand caching—only accessed data and metadata are pulled from the origin.

Answer: (D)

FlexCache uses on-demand caching: only the data and the related metadata that are actually accessed are pulled from the origin and stored in the cache. This approach minimizes upfront bandwidth and storage use, while speeding up future reads because once something is cached, it can be served locally. When a read hits data that isn’t yet cached, FlexCache fetches that data from the origin and caches it for subsequent requests. It caches both the data blocks and the necessary metadata, not just metadata. The other scenarios—pre-populating everything, caching only metadata, or not caching at all—don’t fit how FlexCache operates, since they would either waste resources or degrade performance.

FlexCache uses on-demand caching: only the data and the related metadata that are actually accessed are pulled from the origin and stored in the cache. This approach minimizes upfront bandwidth and storage use, while speeding up future reads because once something is cached, it can be served locally. When a read hits data that isn’t yet cached, FlexCache fetches that data from the origin and caches it for subsequent requests. It caches both the data blocks and the necessary metadata, not just metadata. The other scenarios—pre-populating everything, caching only metadata, or not caching at all—don’t fit how FlexCache operates, since they would either waste resources or degrade performance.