You are provisioning a LUN on a VNX array with FAST VP enabled. In addition to Highest Tier
Available and Lowest Tier Available, what other tier option(s) is displayed?
A.
Auto-Tier
B.
Auto-Tier, No Data Movement
C.
Optimize for Performance, No Data Movement
D.
Optimize for Performance
The correct answer is: “B”
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No Data Movement option is available only when the LUN is already created. During the creation there is no such option.
http://www.emc.com/collateral/software/white-papers/h8058-fast-vp-unified-storage-wp.pdf – page 15
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Auto-tier – Auto-tier will initially place LUN data across all tiers in an optimal manner, and will then relocate slices of these LUNs based on their activity level. Some slices may be initially placed on an inappropriate tier, so this policy is not recommended.
•Highest available tier – Highest available tier should be selected for those LUNs which require the highest level of performance. FAST VP will prioritize slices of a LUN with highest available tier selected above all other settings.
•Lowest available tier – Lowest available tier should be selected for LUNs that are not performance- or response-time-sensitive. FAST VP will maintain slices of these LUNs on the lowest storage tier available regardless of activity level.
•No data movement – This policy may only be selected after a LUN has been created. FAST VP will not move slices from their current positions once this policy has been selected.
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