Dell PowerStore 3000X EMC PowerStore Virtualization Infrastructure Guide - Page 26

VMware snapshot limitations vSphere allows a maximum snapshot tree depth of 31 for a VM. Scheduled and manual snapshots interact with this limit in different ways. Scheduled snapshots When you create a VM snapshot schedule as a part of a protection policy, you can set a retention policy specifying how long to keep snapshots. Snapshots older than the age that the retention policy specifies are deleted. This policy helps keep the total number of snapshots below the limit. If the maximum number of snapshots is reached, the oldest snapshot is automatically deleted when the protection policy creates the next snapshot. Although manual snapshots count towards this limit, they are never deleted automatically unless the expiration date is reached. Manual snapshots Manual snapshots that are created with PowerStore Manager or vSphere cannot have a retention policy and are never deleted without user action. If the maximum number of snapshots is reached, no more can be created unless you delete snapshots to make room. Other limitations The following limitations apply to this release of PowerStore: ● PowerStore X model supports only single appliance clusters. ● PowerStore clusters support up to 50 storage containers. 26 Best practices and limitations