6.5.1

Table Of Contents
Software-Defined Storage Models
In addition to abstracting underlying storage capacities from VMs, as traditional storage models do,
software-defined storage abstracts storage capabilities.
With the software-defined storage model, a virtual machine becomes a unit of storage provisioning and
can be managed through a flexible policy-based mechanism. The model involves the following vSphere
technologies.
Storage Policy Based
Management
Storage Policy Based Management (SPBM) is a framework that provides a
single control panel across various data services and storage solutions,
including vSAN and Virtual Volumes. Using storage policies, the framework
aligns application demands of your virtual machines with capabilities
provided by storage entities.
See Chapter 20 Software-Defined Storage and Storage Policy Based
Management.
VMware vSphere
®
Virtual Volumes™
The Virtual Volumes functionality changes the storage management
paradigm from managing space inside datastores to managing abstract
storage objects handled by storage arrays. With Virtual Volumes, an
individual virtual machine, not the datastore, becomes a unit of storage
management. And storage hardware gains complete control over virtual
disk content, layout, and management.
See Chapter 22 Working with Virtual Volumes.
VMware vSAN vSAN is a distributed layer of software that runs natively as a part of the
hypervisor. vSAN aggregates local or direct-attached capacity devices of an
ESXi host cluster and creates a single storage pool shared across all hosts
in the vSAN cluster.
See Administering VMware vSAN.
I/O Filters I/O filters are software components that can be installed on ESXi hosts and
can offer additional data services to virtual machines. Depending on
implementation, the services might include replication, encryption, caching,
and so on.
See Chapter 23 Filtering Virtual Machine I/O.
vSphere Storage APIs
Storage APIs is a family of APIs used by third-party hardware, software, and storage providers to develop
components that enhance several vSphere features and solutions.
This Storage publication describes several Storage APIs that contribute to your storage environment. For
information about other APIs from this family, including vSphere APIs - Data Protection, see the VMware
website.
vSphere Storage
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