Seminarium: Systemy Rozproszone
23 października 2025 12:15, sala 4070
Michał Płachta, Szymon Potrzebowski

Evaluation of distributed and autonomous TSCH schedulers in large-scale low-power wireless networks

My thesis focuses on evaluating how different distributed TSCH (Time Slotted Channel Hopping) schedulers perform in large scale, real world IoT networks. TSCH is a MAC protocol that enables reliable and energy efficient communication in low power wireless networks, allowing networks of small devices to run for years on a single battery. Its performance heavily depends on the scheduler that determines when and how nodes communicate. In my work plan to study several schedulers and compare them on the 1KT testbed to evaluate how they handle trade-offs between reliability, latency, and energy consumption. I plan to cover Orchestra which is widely used as a baseline scheduler in the research community, MSF which is a proposal for standarization within IETF and other novel approaches.

Zapraszam,
Michał Płachta

Concurrent deletion in a scale-out deduplicating storage system utilizing SSDs for metadata

Data deletion in a presence of deduplication is a complex, albeit critical process in a scale-out secondary storage. Recent advent of relatively cheap and big SSDs delivering high IOPS rates allows for redesign of data deletion algorithm utilizing theses SSDs for metadata. The new algorithm should be much simpler resulting in easier verification and testing; moreover, it should deliver better performance in determination of which blocks are to be deleted. I plan to design a deletion algorithm utilizing large SSDs for metadata. My thesis will also evaluate available alternatives and compare them against the chosen method and against the older deletion algorithm utilizing HDDs for metadata implemented in NEC HYDRAstor.

Zapraszam,
Szymon Potrzebowski