A customer deploys a FlexCache volume on the same cluster as the origin volume and sees minimal latency improvement. What is the most likely reason?

A customer deploys a FlexCache volume on the same cluster as the origin volume and sees minimal latency improvement. What is the most likely reason?

• A. FlexCache only benefits when deployed on a different cluster.
• B. Read requests already have low latency because they don't traverse a WAN link.
• C. FlexCache is not compatible with same-cluster deployments.
• D. The FlexCache volume failed to establish a peering relationship.

Answer: (B)

FlexCache is designed to reduce read latency by caching frequently accessed data closer to the clients, typically across a WAN or between separate clusters. The big win comes when the cache is nearer to the users than the origin, so many reads can be served from the cache rather than traversing a slower network path. If the cache and the origin reside on the same cluster, read requests are already reaching data with very low, LAN-level latency. There’s no WAN link to traverse, so the cache doesn’t have a long-distance path to optimize. That’s why you’d see only a minimal latency improvement in this setup—the path improvement FlexCache provides over a remote read simply isn’t there. If you wanted to realize a noticeable benefit, you’d place the cache at a remote site or on a different cluster closer to the clients and ensure the peering relationship is established and healthy.

FlexCache is designed to reduce read latency by caching frequently accessed data closer to the clients, typically across a WAN or between separate clusters. The big win comes when the cache is nearer to the users than the origin, so many reads can be served from the cache rather than traversing a slower network path.

If the cache and the origin reside on the same cluster, read requests are already reaching data with very low, LAN-level latency. There’s no WAN link to traverse, so the cache doesn’t have a long-distance path to optimize. That’s why you’d see only a minimal latency improvement in this setup—the path improvement FlexCache provides over a remote read simply isn’t there.

If you wanted to realize a noticeable benefit, you’d place the cache at a remote site or on a different cluster closer to the clients and ensure the peering relationship is established and healthy.