Release Notes

13 Migrating an Oracle Database to Dell EMC SC Series Storage | CML1001
Storage profiles available with both write SSDs and read SSDs
Name
Initial
write tier
Tier (T) and RAID levels
Progression
Flash Optimized with Progression
(Tier 1 to All Tiers)
1
Writes: T1 RAID 10
Snapshots: RAID 5/RAID 6
To all tiers
Write Intensive (Tier 1)
1
Writes: T1 RAID 10
Snapshots: T1 RAID 10
Stay in tier 1
Flash Only with Progression
(Tier 1 to Tier 2)
1
Writes: T1 RAID 10
Snapshots: T2 RAID 5
To tier 2
Low Priority with Progression
(Tier 3 to Tier 2)
3
Writes: T3 RAID 10
Snapshots: T3 RAID 5/6 or T2 RAID 5
To tier 2
Low Priority (Tier 3)
3
Writes: T3 RAID 10
Snapshots: T2/T3 RAID 5/6
Stay in tier 3
To maximize the economics of storage and achieve a balance between performance and space efficiency, it
is recommended to use a storage profile that allows data to progress to all tiers, such as Recommended or
Flash Optimized with Progression. When a volume uses the Recommended profile, new data is written to
tier 1 RAID 10 storage. Over time, less-active data is moved to tier 1 RAID5/RAID6 and lower tiers of storage.
For environments where performance is critical, ensure there are a sufficient number of drives and capacity in
tier 1, then set the storage profile to High Priority or Write Intensive. This guarantees data is written to tier 1
RAID 10 storage and less-active data can only move to RAID5/RAID6 in tier 1. In the event that tier 1 storage
is full, SCOS migrates data off to lower tiers to free up space.
More details on storage profiles can be found in the DSM Storage Center Administrator’s Guide.