[DB Seminar] Spring 2018: Ziqiang Feng

Speaker:

Ziqiang Feng

High-resolution, continuously-recording, and nearly-ubiquitous cameras provide great value for retrospective video analysis tasks in areas such as crime investigations and scientific research. This kind of video analysis task is often both interactive and exploratory in nature, where multiple queries are tried, aborted, refined, and re-executed in an iterative fashion. This exploratory video analysis usage model presents some unique challenges and... Read More

[DB Seminar] Spring 2018: Joy Arulraj

Speaker:

Joy Arulraj

We are at an exciting point in the evolution of memory technology. Device manufacturers have created a new non-volatile memory (NVM) technology that can serve as both system memory and storage. NVM supports fast reads and writes similar to volatile memory, but all writes to it are persistent like a solid-state disk. The advent of NVM invalidates decades of design... Read More

[DB Seminar] Spring 2018: Ziqi Wang

Speaker:

Ziqi Wang

Abstract: Lock-free data structures have long been rumored to provide better performance and scalability than their lock-based counterparts. On the other hand, however, there are state-of-the-art in-memory indices using various fine-grained synchronization techniques that outperform the classical lock coupling implementation. In this talk, we investigate into a concrete, optimized implementation of a lock-free B+Tree, the Bw-Tree[1], and then conduct an... Read More

[DB Seminar] Spring 2018: Joy Arulraj

Speaker:

Joy Arulraj

For the first time since Von Neumann's architecture of the 1940s, device manufacturers have created a new non-volatile memory (NVM) technology that can serve as both system memory and storage. NVM supports low-latency byte-addressable reads and writes similar to volatile memory, but all writes to it are persistent like a solid-state disk. The advent of NVM invalidates decades of design... Read More

[DB Seminar] Fall 2017: Prashanth Menon

Speaker:

Prashanth Menon

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[DB Seminar] Fall 2017: Barry Morris (NuoDB)

Speaker:

Barry Morris

System:

NuoDB

For decades the industry has sought solutions to the challenge of efficient distributed transactions, and ideally to elastically-scalable distributed transactions.  The opportunity for such systems is to provide on-demand capacity, redundancy-based uptime models, and automation of labor-intensive administrative tasks.  Additionally Elastic SQL systems may provide a route to geo-distributed transactions processing.  The approaches to this challenge have all involved very... Read More

[DB Seminar] Fall 2017: Joy Arulraj

Speaker:

Joy Arulraj

For the first time in 25 years, a new non-volatile memory (NVM) category is being created that is two orders of magnitude faster than current durable storage devices. The advent of NVM fundamentally changes the dichotomy between memory and durable storage in database systems. These new NVM devices are almost as fast as DRAM, but all writes to it are... Read More

[DB Seminar] Fall 2017: Capstone Project Practice Talks

Speakers:

Shuyao Bi, Patrick Huang, Chen Luo, Prashasthi Prabhakar, Min Huang

Five of the DB group's Masters students will present their Capstone Projects: Building in-memory DBMS cost model in Peloton (Shuyao Bi) Extend Query Optimizer in Peloton (Patrick Huang) Robust Hash Join Execution (Chen Luo) JIT Compilation of User-Defined Functions in High Performance Database Management Systems (Prashasthi Prabhakar) ART index and index scan code gen (Min Huang) Read More

TimescaleDB: Re-engineering PostgreSQL as a Time-series Database (Michael Freedman)

Speaker:

Michael J. Freedman

System:

TimescaleDB

Video:

YouTube

Time-series data is now everywhere—IoT, user event streams, system monitoring, finance, adtech, industrial control, transportation, and logistics—and increasingly used to power core applications. It also creates a number of technical challenges: to ingest high volumes of structured data; to ask complex, performant queries for both recent and historical time intervals; to perform specialized time-centric analysis and data management. And this... Read More

[Fall 2017] Peloton Hack-a-thon

The CMU Database Group is holding an all day programming session for the Peloton database system project. The goal of this event is to provide an introduction to the system and teach students how to get started with the project. The day will begin with an overview of the system and build/test it. We will then teach everyone how to... Read More