Veritas™ File System 5.0.1 Programmer's Reference Guide

Thin Reclamation
This chapter includes the following topics:
■ About Thin Storage
■ About Thin Reclamation
■ Thin Reclamation application programming interface
About Thin Storage
Thin Storage is the result of using Thin Provisioning-capable arrays. Thin Storage
is an array vendor solution for allocating storage to applications only when the
storage is truly needed, from a pool of free storage. The Thin Storage solution
tries to solve the problem of under utilization of available array capacity. Thin
Storage reclaim-capable arrays and LUNs allow the administrators to release
previously-used storage to the pool of free storage.
About Thin Reclamation
Some vendors support a reclamation capability on Thin Storage arrays, on which
the administrator can initiate the process of reclaiming free storage from the file
systems or disks in the LUN or array so that this storage is released to the free
storage pool. Such arrays and LUNs are referred to as Thin Provisioning arrays
and LUNs. The Storage Foundation Thin Reclamation feature reclaims free blocks
through command line and programmatic interfaces.
Thin Reclamation application programming interface
You can use Thin Reclamation with the following API:
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