The following AppSync terms are used in this document:
- Service plan: A copy-management workflow template used for protecting applications. There are three integrated types in AppSync as mentioned below.
- Bronze Service plan: Creates copies of the protected application database on the local storage where production is located.
- Silver Service plan: Creates copies of the protected application database on the remote storage.
- Gold Service plan: Creates copies of the protected application database on the local and remote storage appliances. Two copies are created.
- Repurposing workflow: A copy-management workflow process, similar to the service plan workflow, that provides a multigeneration copy process.
- Application (object): Any database, file system, application, or datastore that AppSync manages. Access control lists (ACLs) are applied to these items. Objects are either subscribed to service plans or are repurposed individually.
- Mount host: The host where the copy is presented or where the mounted copy resides. This can be an alternate host or the same host as the source.
- Mount point: A location used by the mount operation which uses an existing mounted file system as a directory tree for the copied volume-mount location. This is the default AppSync mount location.
- Recover: A workflow extending the copy and mount operation. This process can start the application once it is mounted, such as bringing a SQL or Oracle database online on a mount host.
- Restore: A workflow of overwriting the source volume with the contents of a copy created previously.
- PowerStore Snapshot: A read-only and point-in-time copy of a volume or volume group. A snapshot cannot be presented to a host directly, a clone must be created from it and then presented to the host.
- PowerStore Secure Snapshot: Secure snapshots are snapshots that prevent accidental or intentional deletion of snapshots. Secure snapshots cannot be manually deleted while the retention period is in effect. This capability is available with AppSync 4.6 and higher and PowerStoreOS 3.5.0 and higher.
- PowerStoreThin Clone: A read/write and point-in-time copy of a volume or volume group. On creation of a thin clone, the data is available to be presented to a host as needed. Any changed data on the thin clone does not affect the base resource and conversely any changes to the thin clone do not affect the snapshot source.
- Expire: A workflow of removing copies from the AppSync UI and removing the copy on the PowerStore appliance.
- Recovery point objective (RPO): The acceptable amount of data, measured in units of time, which may be lost due to a failure. For example, if a storage resource has an RPO of one hour, any data written to the storage resource within the most recent hour may be lost when the replication session is failed over to the destination storage resource.
The following PowerStore terms are used in this document:
- Appliance: The solution containing the base enclosure and any attached expansion enclosures.
- Cluster: One or more appliances in a single grouping and management interface. Clusters are expandable by adding more appliances to the existing cluster, up to the allowed amount for a cluster.
- Fibre Channel protocol (FC): A protocol used to perform Internet Protocol (IP) and SCSI commands over a Fibre Channel network.
- Internet SCSI (iSCSI): Provides a mechanism for accessing block-level data storage over network connections.
- Snapshot: A point-in-time view of data stored on a storage resource. A user can recover files from a snapshot or restore a storage resource from a snapshot.
- Storage resource: The top-level object a user can provision, associated with a specific quantity of storage. All host access and data protection activities are performed at this level. In this document, storage resource refers to resources which can support replication: volumes or volume groups.
- Volume: A block-based storage resource that a user can provision. It represents a logical storage area.
- Volume group: A single point of management for multiple storage resources (volumes) that work together as a unit.
- Migration: Nondisruptive migration of a volume, volume group, or VMware vSphere Virtual Volume (vVol) between appliances within a cluster.
- Asynchronous replication: A replication method which allows you to replicate data over long distances and maintain a replica at a destination site. Updates to the destination image can be issued manually, or automatically based on a customizable RPO.
- Replication session: A relationship configured between two storage resources of the same type, on the same or different systems, to automatically or manually synchronize the data from one resource to another.
- Snapshot shipping: Asynchronous replication that supports the replication of read-only block snapshots locally or to a remote site along with the storage resource data. Snapshot replication can be enabled by default on all resources that support asynchronous replication including volumes, thin clones, and volume groups.