The Veritas Access SmartTier feature makes it possible to allocate two tiers of storage to a file system.
The following features are part of the Veritas Access SmartTier solution:
Relocate files between primary and secondary tiers automatically as files age and become less business critical.
Prune files on secondary tiers automatically as files age and are no longer needed.
Promote files from a secondary storage tier to a primary storage tier based on I/O temperature.
Retain original file access paths to eliminate operational disruption, for applications, backup procedures, and other custom scripts.
Let you manually move folders, files and other data between storage tiers.
Enforce the policies that automatically scan the file system and relocate files that match the appropriate tiering policy.
The SmartTier functionality is available only for a Cluster File System and not for a scale-out file system.
In Veritas Access, there are two predefined tiers for storage:
Current active tier 1 (primary) storage.
Tier 2 (secondary) storage for aged or older data.
To configure Veritas Access SmartTier, add tier 2 (secondary) storage to the configuration. Specify where the archival storage resides (storage pool) and the total size.
Files can be moved from the active storage after they have aged for a specified number of days, depending on the policy selected. The number of days for files to age (not accessed) before relocation can be changed at any time.
An aged file is a file that exists without being accessed.
Figure: SmartTier features depicts the features of Veritas Access and how it maintains application transparency.
Figure: SmartTier features
If you are familiar with Veritas Volume Manager (VxVM), every Veritas Access file system is a multi-volume file system (one file system resides on two volumes). The SmartTier tiers are predefined to simplify the interface. When an administrator wants to add storage tiering, a second volume is added to the volume set, and the existing file system is encapsulated around all of the volumes in the file system.
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