EMC VNX – RAID groups vs Storage Pools
With EMC training I have learnt some general guidelines, that should be followed to optimize and enable good performance on a VNX Unified storage system.
Drive types
When you chose a specific drive type, you should base your choice upon the expected workload.
FLASH – Extreme Performance Tier – great for extreme performance.
SAS – Performance Tier – perfect for general performance. Usually 10k RPM or 15k RPM.
NL-SAS – Capacity Tier – most cos...
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RAID levels
Automated Storage Tiering (AST)
Automated Storage Tiering (AST)
Automated storage tiering (AST) is a storage software management feature that dynamically moves information between different disk types and RAID levels to meet space, performance and cost requirements.
Automated storage tiering features use policies that are set up by storage administrators. For example, a data storage administrator can assign infrequently used data to slower, less-expensive SATA storage but allow it to be automatically moved to h...
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