3. Service Offering Examples : 3.3 Service Offering – Dedicated : 3.3.2 Resource Allocation and Catalogs
   
3.3.2 Resource Allocation and Catalogs
Using the Reservation Pool allocation model in the Dedicated service offering enables providers to aggregate resources in bulk, with a 100% upfront physical capacity guarantee for target service subscribers whose workloads demand the most stringent service levels for capacity availability, performance, and security isolation. Like the Committed service offering, this service tier provides equal flexibility in how resources are allocated through published vApp catalogs in vCloud Director. Subscribers are entitled to the same privileges for creating their own custom and private vApp catalogs, in addition to use of any public catalogs and standard application images that may be made available by the provider.
The following table provides an example of different sizing combinations that can be included in a Dedicated service offering (virtual datacenter) catalog. Values in the CPU Capacity Reserved and Memory Capacity Reserved columns imply a 100% dedicated resource guarantee upfront. Depending on the customizable sizing options made available by a provider of this service, subscribers may be able to specify non-standard combinations of resource types, such as CPU, memory, storage, and quantities. It is still recommended, however, that providers first implement a pricing model commensurate with the range of scale for each resource type.
Table 18. A Dedicated Service Offering Catalog
Virtual Datacenter Instance Size
Compute Nodes
Reserved1
CPU
Capacity Reserved2 (GHz)
Memory Capacity Reserved3 (GB)
Storage Limit4 (GB)
Bandwidth5 (MBps)
Cost
Small
2–4
9.6–
19.2GHz
512–1024GB
Variable
95th percentile
Set by provider
Medium
4–8
19.2–38.4GHz
10242048GB
Variable
95th percentile
Set by provider
Large
8–16
38.4–76.8GHz
20484096GB
Variable
95th percentile
Set by provider
Extra Large
16–32
76.8–153.6GHz
40968192GB
Variable
95th percentile
Set by provider
 
1 Compute node form factor can be either blade servers or rackmount servers. This example assumes a generic (x86) dual-processor blade server.
2 CPU capacities in this example are based on each compute node having dual Intel 2.4GHz Xeon E7-2870 processors.
3 Memory capacities in this example are based on the each compute node having 256GB of physical memory.
4 Storage allocations may be selected individually and can be customized for all virtual datacenter sizes from Small through Extra Large based on individual subscriber requirements.
5 Ingress/Egress bandwidth allocation can be customized for all virtual machine instances from Small through Extra Large based on individual subscriber requirements and the Internet service capabilities available at the provider.
 
Although resources assigned at the organization virtual datacenter layer in the Dedicated service offering are fully reserved and dedicated, subscribers to the service are entitled to control resource overcommitment through reservation and limit settings for each individual virtual machine. The following table provides an example of how these resource allocation settings might be configured.
Table 19. Resource Allocation Settings per Virtual Machine
Resource Type
Priority
Reservation
Limit
CPU
*Low (500 Shares)
*Normal (1000 Shares)
*High (2000 Shares)
*Custom
Custom (GHz) per virtual datacenter allocation
*Unlimited
*Maximum (custom)
Memory
*Low (1280 Shares)
*Normal (2560 Shares)
*High (5120 Shares)
*Custom
Custom (GB) per virtual datacenter allocation
*Unlimited
*Maximum (custom)