Organizations today continually search for better ways to simplify storage management processes and improve storage utilization. Thin provisioning, storage virtualization, and thin reclamation are few such prominent techniques to achieve efficient storage utilization. They help you right-size your storage resources and reduce overall storage management operational cost by minimizing the unused storage. Thin Provisioning refers to a technique of improving storage utilization by only allocating to a volume the physical storage required to hold its data. Thin provisioning lets you allocate the physical storage on demand. The thin provisioning is achieved by the layer of abstraction created by storage pooling in the storage virtualization system.
The Thin Provisioning Reclamation Add-on 4.1 for Veritas Operations Manager allows the users to optimize the storage space efficiently by using the Storage Foundation Thin Reclamation application programming interface (API). Using Thin Provisioning Reclamation Add-on, users can simplify the process of thin reclamation and view the reclaimed physical storage space after the reclamation process is completed.
Storage is considered as thin reclaimable by Veritas Operations Manager if the LUNs are visible as thin reclaimable to Veritas Volume Manager on the host. Additionally, that storage must be a part of Veritas disk group that has a mounted Veritas File System or NTFS (for Windows).
The reclamation processes can be configured in the context of different objects that are discovered by Veritas Operations Manager:
Storage arrays: Lets you select the thin pools or LUNs in context to a selected array. The associated LUNs are reclaimed.
Business entity: Lets you specify a flexible reclamation boundary based on a business entity. Since a business entity can include many objects and it is inherently dynamic. Therefore, the storage on which the reclamation is executed, changes automatically whenever any changes are made to the business entity.
Hosts: Lets you select multiple file systems in context to the selected hosts. The associated LUNs to that selection are reclaimed.
The privileges that are required to use Thin Provisioning Reclamation Add-on are as follows:
Domain administrators: The domain administrator can execute any configured reclamation process and create a new reclamation process against any scope or reclaimable object.
For the users with limited administrative rights on a subset of managed domain, the user roles are grouped into two categories:
Users with storage access rights: These users can create the reclamation processes on arrays, business entities, or hosts on which they have administrative privileges.
Users without storage access rights: These users can create the reclamation processes on business entities or hosts on which they have administrative privileges.
The user can configure the reclamation processes to run at a regular scheduled intervals. If you have not scheduled the process run, you can run it manually.