Figure 2 – Dell Compellent SC8000 Controller User Manual
Page 9
Optimizing an Oracle Database with Dell Compellent Automated Tiered Storage
Page 6
Figure 2.
Dell Compellent Automated Tiered Storage - Data Progression
Unlike many newcomers to the storage tiering market, Dell Compellent Data Progression is built right
into the virtualized storage platform. It realizes the full potential of automated tiered storage.
True Virtualization. Dell Compellent engineered its Fluid Data architecture from the ground
up to include Data Progression. Fluid Data was architected to provide truly virtualized
storage that spans all disks in the storage environment. Fluid Data provides an ideal
foundation for tiered storage. With Fluid Data, there are no constraints on where data can
reside, as data is not confined to conventional disk group. Data can be moved without
limitation to a tier with a particular drive type or performance level, or to a particular RAID
level within a storage tier.
Build-in Feature. Dell Compellent Data Progression is built right into the storage platform;
it does not require additional hardware or server-side agents to operate.
Fine Granularity. Dell Compellent Fluid Data facilitates a highly granular approach for Data
Progression to migrate data in small sizes of 512 KB, 2 MB or 4MB. The granular approach
optimizes tiering by moving less data in the backend and placing data with a greater level of
precision.
Real Time Intelligence. Dell Compellent captures real-time use characteristics of each data
block at 512 byte level. This information provides the intelligence to determine whether
and when blocks of data should be moved from one storage tier, or one RAID level, to
another.
Snapshot Integration. Dell Compellent Data Progression is tightly integrated with the Dell
Compellent snapshot feature – Data Instant Replay. In the Dell Compellent architecture,
new data is written by default to tier 1, RAID 10 storage to provide the best write
performance. Replays move to a lower storage tier with RAID 5 or 6 protections. When new
data needs to be written to an existing block that has been migrated to a lower tier, writes
are redirected to the tier 1, RAID 10 storage to guarantee superior write performance.
True Automation. Dell Compellent Data Progression provides fully automated sub-LUN
tiering. Administrators use policy-based profiles to drive placement and movement of data.