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Relaxed Concurrent Queues appear in ACM Trans. Parallel Computing

Relaxed Concurrent Queues (RCQs) is a new family of queues that we developed (with Giorgos Kappes) to provide low latency in queue operations and item transfers. Our goal is to improve the responsiveness of the applications and systems running on manycore machines with fast devices. In our work we introduce several new queue algorithms with provable properties on progress, correctness and bounded FIFO distance along with extensive experimental comparisons to representative existing strict and relaxed data structures. Please check our article in the latest issue of ACM Transactions on Parallel Computing for details:

https://dl.acm.org/doi/10.1145/3565514

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Cloud computing & quality-of-service guarantees (?) Ioannina Science Festival 2022

Cloud computing is a significant technological innovation that allows the remote access to computing services at the central infrastructures of providers. The offered quality in several cases is specified through guarantees about the reliability and performance of the service along with the privacy of the personal data. Often the free access to cloud services is accompanied by advertisement messages that at some extent can be controlled by the user through available options. In the presentation we examine the user-friendliness and clarity of the interfaces in the control of the offered quality of service. The choice architecture and the help through default options is often specified not only by the preferences of the user but mainly by the priorities of the provider. Thus, there are general issues opened up for the guarantees that the services should provide and their consistency with respect to serving the real needs of the user.

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Giorgos Kappes successfully defended his PhD thesis

Today, Giorgos Kappes, member of the Computer Systems Lab, University of Ioannina, successfully defended his doctoral thesis entitled “User-level Services for Multitenant Isolation”. Congratulations to Giorgos for his excellent work on data-intensive cloud systems and many thanks to the Examination Committee Members from U.Ioannina, U.Athens, NTUA and AUEB for their very encouraging comments!