| Abstract [eng] |
Nowadays datacenters provide different network, hosting, terminal desktop and other services, and it has become very important to be able to evaluate the quality of these services. SLA (Service Level Agreement) metrics define the quality of service, but it also depends on the needs of the particular user. So the evaluation methodology was created in order to compare the quality of services, both: for the user, and for the datacenter service provider. A service provider has to implement the server architecture with network connection and server redundancy in order to assure high service availability. Two most popular datacenter services were analyzed: “thin-client” architecture and web services. The web service quality evaluation experiments have been made to show that web oriented performance metric \"Web Response Time\" (WRT) is more informative for web service quality assurance, comparing to the traditional latency and loss metrics in the network environment. “Thin-client” architecture analysis show that it can be used both in LAN and WAN networks, and it can be economically useful to outsource IT systems to datacenters by using this technology. Network and server resource performance monitoring has to be done in order to supply high quality services - so datacenter service providers have to use monitoring hardware and software to make periodical measurements and collect, store and process the results. |
