Dell PowerEdge T110 II - Manual (Page 7)

Oracle Database Migration to Dell PowerEdge 12 th Generation Servers and Dell Compellent Storage
Systems
7
Reasons Why Customers Migrate to Dell Compellent
Compellent has built-in virtualization to simplify management, maximize efficiency, provide flexibility
to adapt to changing requirements, and lower the TCO. Many of these benefits are most noticeable at
the time of a hardware refresh.
To eliminate the need for future migration projects, once data is on Compellent it can be migrated to
additional or future hardware incrementally, easily, non-disruptively, without interruption in snapshot
and instant restore options, all from within the storage GUI.
To eliminate economically disruptive transitions and premature obsolescence, several features are
helpful. Future disk interconnects, as well as SAN interconnects, can be added to existing controllers.
The aforementioned incremental migration allows old and new resources to be effectively managed
together with less hassle and less over-provisioned resources than a single-frame model. Disks can be
gracefully removed from a virtually-provisioned pool without destroying the pool, so that disk refreshes
are easy, routine, and deferred until the disks are too old. In this way older disks can continue to
deliver performance benefits competitively even if their capacity is lower than the newer disks.
Compellent customers can upgrade the hardware indefinitely simply by replacing the hardware: the
software does not have to be re-purchased. This greatly reduces the budgetary hit from an upgrade.
To reduce wasteful over-provisioning of capacity, moving to Compellent built-in virtualization enables
thin provisioning without imposing a performance reduction.
To use disk performance more efficiently, Compellent’s space-efficient snapshots come without the
extra work to move old data out of the way, known as copy-on-write. Compellent has a long history of
high customer adoption rates of advanced snapshot technology.
To reduce wasteful over provisioning of higher cost, higher performing tiers, Compellent offers tiering
based on historical access patterns so that application performance is more dependable. The tiering
uses an appropriate granularity much lower than a GB, reducing over-provisioning, yet large enough to
avoid creating a resource penalty at the controller level. The tiering can not only can mix RAID levels
but shift the RAID levels used within a tier based on the type of data access. Compellent can tier
within a disk to prevent seek times from growing as much as disks fill up: hot data is more
concentrated on the disk. With automatic provisioning, the initial setup does not determine the cost of
the resources that will be consumed. Therefore Compellent provides charge-back reporting so that the
departments driving the expenses can be charged appropriately, and departments with efficient
application deployments can benefit from the savings that tiering delivers.
Dell has found that a demonstration of how Compellent is set up and managed is typically the tipping
point that moves people to make a change.
Ultimately, the decision to migrate often flows naturally from having seen a Compellent
demonstration.
By using Dell to provide the complete data center solution, it becomes easier to make sure that
everything needed to support the application requirements are met.