9.3 SLA MANAGEMENT SYSTEM CLOUD COMPUTING

9.3. SLA Management System

The SLA management system mechanism represents a range of commercially available cloud management products that provide features pertaining to the administration, collection, storage, reporting, and runtime notification of SLA data (Figure 9.7).
Figure 9.7.


An SLA management system encompassing an SLA manager and QoS measurements repository.
An SLA management system deployment will generally include a repository used to store and retrieve collected SLA data based on pre-defined metrics and reporting parameters. It will further rely on one or more SLA monitor mechanisms to collect the SLA data that can then be made available in near-real time to usage and administration portals to provide on-going feedback regarding active cloud services (Figure 9.8). The metrics monitored for individual cloud services are aligned with the SLA guarantees in corresponding cloud provisioning contracts.

Figure 9.8.

(1) A cloud service consumer interacts with a cloud service .
(2A) An SLA monitor intercepts the exchanged messages, evaluates the interaction, and collects relevant runtime data in relation to quality-of-service guarantees defined in the cloud service’s SLA .
(2B) The data collected is stored in a repository
(3) that is part of the SLA management system .
(4) Queries can be issued and reports can be generated for an external cloud resource administrator via a usage and administration portal
(5) or for an internal cloud resource administrator via the SLA management system’s native user-interface .

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