Which storage container option reduces the available storage to other containers?

Reserved Capacity is a storage container setting that guarantees a specific amount of physical storage space from the storage pool for that container's use. When capacity is reserved for one container, it is immediately subtracted from the total available storage pool capacity. This action directly reduces the amount of storage that is available for all other containers on the cluster, as the reserved space cannot be consumed by them even if the reserving container is not using it.

A. Advertised Capacity: This is a soft limit used for monitoring and alerting. It does not physically reserve space from the storage pool or prevent other containers from using it.
B. Erasure Coding: This is a data efficiency feature that increases usable storage capacity by using parity instead of full data copies, thereby making more space available.
C. Capacity Deduplication: This is a data efficiency feature that saves space by eliminating redundant data blocks, which increases the total available storage for all containers.

1. Nutanix Prism Web Console Guide v6.5: In the "Storage Management" section, under "Creating a Storage Container," the guide specifies for Reserved Capacity: "When you reserve space for a storage container, that space is no longer available to other storage containers." For Advertised Capacity, it states: "This is a soft limit... it does not reserve space in the storage pool."

2. Nutanix University - Nutanix Hybrid Cloud Fundamentals Courseware (v6): The "Nutanix Storage Concepts" module explains that Reserved Capacity carves out a dedicated portion of the storage pool for a specific container, thus reducing the pool's capacity available to others. It contrasts this with Advertised Capacity, which is described as a logical boundary for reporting.

3. Nutanix Acropolis: Advanced Administration Guide v6.5: The "Storage Container Configuration" section details the function of Reserved Capacity, stating it ensures a minimum capacity is always available to the specified container by reserving it from the shared storage pool, thereby impacting the capacity available to other entities.