Setting emptyDir.medium to Memory in Kubernetes configures the volume as what?

Setting emptyDir.medium to Memory in Kubernetes configures the volume as what?

• A. It configures the volume as a high-performance cache area
• B. It stores persistent data on disk
• C. It enables data replication across nodes
• D. It marks volume as read-only

Answer: (A)

Setting emptyDir.medium to Memory makes the volume backed by RAM (tmpfs) on the node. This uses memory for storage, delivering very high I/O performance, which is ideal for temporary caches or scratch data. The trade-off is non-persistence: the data is lost if the pod is deleted, the node reboots, or the pod moves to another node. It does not persist to disk, it does not provide cross-node replication, and it isn’t inherently read-only. So the in-memory configuration best describes it as a high-performance in-memory area that acts like a cache.

Setting emptyDir.medium to Memory makes the volume backed by RAM (tmpfs) on the node. This uses memory for storage, delivering very high I/O performance, which is ideal for temporary caches or scratch data. The trade-off is non-persistence: the data is lost if the pod is deleted, the node reboots, or the pod moves to another node. It does not persist to disk, it does not provide cross-node replication, and it isn’t inherently read-only. So the in-memory configuration best describes it as a high-performance in-memory area that acts like a cache.