[Cloud Computing]Patterns: Elastic Disk Provisioning

通过采用动态磁盘分配机制,此方案解决了云存储中消费者通常为未使用的存储空间付费的问题。利用细粒度的动态分配与回收机制,以及存储使用情况监测,确保了云存储费用直接与实际消耗的存储空间挂钩。

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Elastic Disk Provisioning (Erl, Naserpour)

How can the billing of cloud storage be based on actual, fluctuating storage consumption?

Problem

When cloud providers charge for fixed-disk storage allocation, the billing is based on the capacity of the disks, not their actual usage. As a result, cloud consumers are generally billed for more storage than they consume.

Solution

A dynamic storage provisioning system is established to dynamically allocate and remove (and collect billing data for) storage space at a granular level.

Application

Thin provisioning and dynamic allocation technology is used with cloud storage monitors to enable elastic storage space provisioning and the measuring of usage data for billing purposes.

A scenario based on the use of a dynamic-disk allocation based provisioning model.

A sample cloud architecture resulting from the application of the Elastic Disk Provisioning pattern.

The fixed-disk allocation based provisioning model compared to the dynamic disk provisioning model.

NIST Reference Architecture Mapping

This pattern relates to the highlighted parts of the NIST reference architecture, as follows:

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