FP7 IRMOS also examined aspects of translation of ALS terms at the application level into resource-based attributes to bridge the gap between customer expectations and cloud provider resource management mechanisms. [14] [15] The European Commission has presented a summary of the results of various ALS research projects (from specifications to monitoring, management and implementation). [16] A service level contract is an agreement between two or more parties, one being the customer and the other service provider. It may be a formal or informal legally binding “treaty” (for example. B internal relations within the department). The agreement may include separate organizations or different teams within an organization. Contracts between the service provider and other third parties are often referred to as SLAs (wrongly) – the level of service having been set by the (main) customer, there can be no “agreement” between third parties; these agreements are simply “contracts.” However, operational agreements or olea agreements can be used by internal groups to support ALS. If an aspect of a service has not been agreed with the customer, it is not an “ALS.” Many SLAs follow the specifications of the Information Technology Infrastructure Library when applied to IT services. The aim is to make the control possibilities for the client transparent and to accurately describe overly safe performance characteristics such as performance level, reaction time and speed of machining. An important element is the level of service, which describes the agreed quality of service and contains information about the range of services (e.g. time. B, volume), availability, supplier response time, etc. The typical example is the operation of servers, which are 24 hours a day, 7 days a week with a maximum z.B failure rate of 0.1% per year and a response time of 30 minutes after reporting the damage by an external service provider that must be.
[1] The fundamental advantage of cloud computing is the sharing of resources, supported by the underlying nature of a common infrastructure environment. SLAs therefore extend to the cloud and are offered by service providers as a service-based contract and not as a customer-based agreement. Measuring, monitoring and covering cloud performance is based on the final UX or its ability to consume resources. The disadvantage of cloud computing compared to ALS is the difficulty of determining the cause of service outages due to the complex nature of the environment. Because applications are moved from dedicated hardware to the cloud, they must reach the same level of service, or even more sophisticated than conventional installations. SLAs for cloud services focus on data center features and more recently include network features (see Carrier`s Cloud) to support end-to-end SLAs. [11] ALS often encompasses many elements, from the definition of services to the termination of the contract. [2] In order to ensure rigorous compliance with ALS, these agreements are often designed with specific lines of demarcation and the parties concerned must meet regularly to create an open communication forum.
Rewards and penalties that apply to the supplier are often set. Most ALS also leave room for regular (annual) revisions to make changes. [3] A web service level agreement (WSLA) is a standard for monitoring compliance with web services through the service level agreement.
Komentáře