Administrator Guide

• Congure a threshold denition to create an alert when space starts to get low.
• Migrate volumes from a pagepool with a full tier to a dierent pagepool with more free space.
• Delete unnecessary volumes.
• If Data Reduction is licensed, enable Compression or Deduplication with Compression on some volumes.
Storage Proles
Storage proles control how Storage Center manages volume data. For a given volume, the selected storage prole dictates which disk tier
accepts initial writes, as well as how data progression moves data between tiers to balance performance and cost. Predened storage
proles are the most eective way to manage data in
Storage Center. The storage proles available are determined by the storage type.
Storage Proles for Standard Storage Types
The table below summarizes the storage proles available for standard storage types. Each prole is described in more detail following the
table.
Name Initial Write Tier Tier (T) and RAID Levels Progression
Recommended (All Tiers) 1 Writes: T1 RAID 10 Snapshots:
RAID 5/RAID 6
Yes - to all Tiers
High Priority (Tier 1) 1 Writes: T1 RAID 10 Snapshots: T1
RAID 5/RAID 6
No
Medium Priority (Tier 2) 2 Writes: T2 RAID 10 Snapshots:
T2 RAID 5/RAID 6
No
Low Priority (Tier 3) 3 Writes: T3 RAID 10 Snapshots:
T3 RAID 5/RAID 6
No
NOTE: The Recommended, High Priority, and Medium Priority proles are not available for the Flash Optimized storage type.
Recommended (All Tiers)
The Recommended storage prole is available only when data progression is licensed. Cost and performance are optimized when all
volumes use the Recommended storage prole. The Recommended prole allows automatic data progression between and across all
storage tiers based on data type and usage.
When a volume uses the Recommended prole, all new data is written to Tier 1 RAID level 10 storage. Data progression moves less active
data to Tier 1 RAID 5/ RAID 6 or a slower tier based on how frequently the data is accessed. In this way, the most active blocks of data
remain on high-performance drives, while less active blocks automatically move to lower-cost, high-capacity SAS drives.
Because SSDs are automatically assigned to Storage Tier 1, proles that include Storage Tier 1 allow volumes to use SSD storage. If you
have volumes that contain data that is not accessed frequently, and do not require the performance of Tier 1 SSDs, use a Medium or Low
Priority prole or create and apply a new prole that does not include Storage Tier 1.
High Priority (Tier 1)
The High Priority storage prole provides the highest performance by storing data on Tier 1. It is ecient in terms of using RAID 5 or 6, but
it uses more expensive media to store the data. A volume created using the High Priority prole stores written data on Tier 1 RAID 10.
Snapshot data is stored on Tier 1 RAID 5/RAID 6. Storage Center does not migrate data to lower storage tiers unless Tier 1 storage
becomes full.
Storage Center Overview
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