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Cloud systems are upgraded regularly to improve their performance, fix bugs, deploy new software versions, etc. Their hosted services, for example, telecommunication services, may have stringent non-functional requirements such that they do not tolerate more than five minutes of downtime in a year regardless whether they are provided by a cloud system or the outage is due to an upgrade. Such services...
Availability is a non-functional requirement defined as the percentage of time a system or a service is accessible. This percentage determines the acceptable total outage time for any given period. High-Availability (HA) is a stringent requirement which allows for a maximum of approximately five minutes downtime in a year including outage due to scheduled maintenance and upgrades. It is agreed that...
Cloud systems need to be upgraded to improve their performance, fix bugs, deploy new software versions, etc. Maintaining the availability of the services delivered by the system during upgrades is a big challenge, especially in the case of telecom systems where high-availability is a requirement. In this paper, we discuss some challenges and issues related to the upgrade of cloud systems in the context...
Data repositories play critical role in software management practices. Construction of the estimation models, benchmark of software performance indicators, identification of the process improvement opportunities, and quality assessment are major utilization areas of software repositories. This paper presents the observed difficulties in utilization of external and multi-organizational software benchmark...
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