Service level agreements are also defined at different levels: One of the clearest features of a cloud is that communication between services is done with protocol – The property that makes cloud storage systems highly reliable is – Many SLAs follow the library specifications of the information technology infrastructure when applied to IT services. Financial penalties that a supplier must pay if it is not obliged to comply with the guaranteed conditions are also included. These penalties are often in the form of credits for service time. A Service Level Contract (SLA) is an obligation between a service provider and a customer. Specific aspects of the service – quality, availability, responsibilities – are agreed between the service provider and the service user.  The most common component of ALS is that services are provided to the client in accordance with the contract. For example, internet service providers and telecommunications companies will generally include service level agreements under the terms of their contracts with customers to define service levels of service level sold in plain language. In this case, ALS generally has a medium-time technical definition between errors (MTBF), average repair time or average recovery time (MTTR); Identifying the party responsible for reporting errors or paying royalties; Responsibility for different data rates throughput; Jitter; or similar measurable details. Uptime is also a common metric that is often used for data services such as shared hosting, virtual private servers and dedicated servers. General agreements include network availability percentage, operating time, number of planned maintenance windows, etc.
Most cloud storage utilities provide details of the levels of service that users can expect on their sites, and these will likely be the same for all users. However, a company that develops a service with a private cloud storage provider can negotiate a more tailored deal. In this case, the ALS cloud may contain specifications for conservation policies, the number of copies kept, storage locations, etc. The main point is to create a new level for the grid, cloud or SOA middleware, capable of creating a trading mechanism between service providers and consumers. For example, the EU-funded Framework SLA@SOI 7 research projectexplores aspects of multi-level, multi-supplier slas within service-based infrastructure and cloud computing, while another EU-funded project, VISION Cloud, has delivered results in terms of content-based ALS.