3.2.2 Resource Allocation and Catalogs
The Allocation Pool allocation model in the Committed service offering enables providers to aggregate resources in bulk, with a minimum upfront capacity guarantee for target service subscribers whose workloads demand more stringent service levels for capacity availability and performance. Like the Basic service offering, this service tier provides equal or better flexibility in the way resources are allocated through published vApp catalogs in vCloud Director. Subscribers gain flexibility through entitlements to create their own custom and private vApp catalogs as well as to use any public catalogs and standard application images that might be made available by the provider.
Table 16 table provides an example of different sizing combinations that can be included in a Committed service offering (virtual datacenter)
catalog. V
alues in the CPU Guarantee and Memory Guarantee columns reflect a 75% resource guarantee listed in the example in Table 15. Depending on the customizable sizing options made available by a provider of this service, subscribers might
be able to specify non-standard combinations of resources such as
CPU, memory,
and storage types 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 16. Committed Service Offering Catalog Example
Virtual Datacenter Instance Size | CPU Allocation (GHz) | CPU Guarantee (GHz) | Memory Allocation (GB) | Memory Guarantee (GB) | Storage Limit1 (GB) | Bandwidth2 (MBps) | Cost |
Small | 10GHz | 7.5GHz | 20GB | 15GB | Variable | 95th percentile | Set by provider |
Medium | 25GHz | 18.75GHz | 50GB | 37.5GB | Variable | 95th percentile | Set by provider |
Large | 50GHz | 37.5GHz | 100GB | 75GB | Variable | 95th percentile | Set by provider |
Extra Large | 100GHz | 75GHz | 200GB | 150GB | Variable | 95th percentile | Set by provider |
1 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.
2 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 of the provider.