EMC VMAX 100K, Руководство по эксплуатации продукта

Страница: 88 / 200

Figure 12 Service Level compliance
Flash 15K 10K 7K
Diamond Alloc
Pla num* Alloc
Gold* Alloc
Silver* Alloc
Bronze Alloc
Op mized Alloc
*Not supported on storage groups containing CKD volumes.
Table 37 Service Level compliance legend
Green Data is allowed on this disk drive technology
Red Data not allowed on this disk drive technology
Alloc Preference for initial allocation. Data can
spillover to other pools to avoid failing
allocation, even is the disk drive technology is
Red.
Service Levels
The performance requirements of application workloads vary widely within a single
system. Workloads also fluctuate, sometimes within a very short period of time.
Traditionally, storage administrators manage their storage by mapping available
resources (flash or disk) to the workloads as best they can. Provisioning storage takes
multiple steps and careful calculations to meet the performance requirements for a
workload or application.
Service Levels dramatically simplify this time-consuming and inexact process. Service
Levels are pre-configured service definitions applied to VMAX3 storage groups, each
designed to address the performance needs of a specific workload. VMAX3 arrays are
delivered with different Service Levels ranging from Bronze (mostly 7.2K drives) to
Diamond (mostly flash drives). The Service Level automatically monitors and adapts to
the workload to meet the storage group's response time target.
When an administrator provisions an application's storage, the array (using FAST and
Workload Planner), models the ability of the array to deliver that performance, and
reports:
l
The expected performance range, in response time
l
Whether the array can deliver the requested service level
Storage Tiering
88 Product Guide VMAX 100K, VMAX 200K, VMAX 400K with HYPERMAX OS