Which NetApp Virtual Storage Tier component works at the host level?

A.
Flash Pool

B.
Flash IO

C.
Flash Disk

D.
Flash Accel

E.
Flash Cache

Explanation:
With two recent product additions to VST, NetApp now offers end-to-end Flash options
spanningfrom the client application through the disk subsystem. Controller level. Storage
controller–basedFlash—NetApp® Flash Cache—retains hot, random read data.(You can
learn more about the algorithms used by Flash Cache and other details in a previousTech
OnTap® article.) Disk-subsystem level. NetApp Flash Pool technology uses a hybrid
modelwith a combination of SSDs and HDDs in a NetApp aggregate. Hot random read data
is cachedand repetitive write data is automatically stored on SSDs.Server level. NetApp
Flash Accel™ technology extends VST into the server. It uses any serversideFlash device
(PCI-e Flash card or SSD) as a local cache that off-loads I/O from networks andback-end
storage to deliver optimum I/O efficiency to your busiest applications while freeing upserver
CPU and memory resources. All three levels continue to offer the full advantages of
VST,including: Real-time promotion of hot data with high granularity. Hot data enters VST
immediately,and its 4KB granularity means that it uses Flash-based media very
efficiently.Easy to deploy and simple to manage. VST works with your existing data volumes
and LUNs. Itrequires no complicated or disruptive changes to your storage environment.
There is no need toset policies, thresholds, or time windows for data movement.Fully
integrated. VST is fully integrated with the NetApp Unified Storage Architecture, whichmeans
that you can use it with any NAS or SAN storage protocol with no changes.
Link: https://communities.netapp.com/docs/DOC-19016