[DB Seminar] Spring 2020 DB Group: Active Learning for ML Enhanced Database Systems

Speaker:

Lin Ma

Abstract: Recent research has shown promising results by using machine learning (ML) techniques to improve the performance of database systems, e.g., in query optimization or index recommendation. However, in many production deployments, the ML models’ performance degrades significantly when the test data diverges from the data used to train these models.   In this talk, I will present a solution to... Read More

Anna: a KVS for Any Scale

Speaker:

Chenggang Wu

System:

Anna

Video:

YouTube

Modern cloud providers offer dense hardware with multiple cores and large memories, hosted in global platforms. This raises the challenge of implementing high-performance software systems that can effectively scale from a single core to multicore to the globe. Conventional wisdom says that software designed for one scale point needs to be rewritten when scaling up by 10-100x. In contrast, we... Read More

DuckDB – The SQLite for Analytics

Speaker:

Mark Raasveldt

System:

DuckDB

Video:

YouTube

The great popularity of SQLite shows that there is a need for unobtrusive in-process data management solutions. However, there is no such system yet geared towards analytical workloads. In this talk I will present DuckDB, a novel data management system designed to execute analytical SQL queries while embedded in another process. Zoom Link: https://cmu.zoom.us/j/562649242 Read More

[DB Seminar] Spring 2020 DB Group: Mostly Order Preserving Dictionaries

Speaker:

Chunwei Liu

Dictionary encoding, or domain encoding, is an important form of compression that uses a bijective mapping to replace attributes from a large domain (i.e. strings) with a finite domain (i.e. 32 bit integers). This encoding both reduces data storage and allows for more efficient query execution. Traditional dictionary encoding only supports efficient equality queries, while range queries require that encoded... Read More

[DB Seminar] Spring 2020 DB Group: Round-table Discussion

The DB group will convene to have a casual round-table discussion on database topics. Zoom Link: https://cmu.zoom.us/j/562649242 Read More

[DB Seminar] Spring 2020 DB Group: OtterTune Update

Speaker:

Dana Van Aken

In this talk Dana will provide an update on running OtterTune at SocGen. Or, how OtterTune will take over the world. Zoom Link: https://cmu.zoom.us/j/562649242 Read More

DB Seminar [Spring 2020] : Zero-Overhead Deterministic C++ Exceptions (“Herb Exceptions”)

Speaker:

Rohan Aggarwal

In this talk, Rohan Aggarwal will present a new proposal to the C++ standard for zero-overhead exceptions. A fundamental reason why C++ is successful and loved is its adherence to Stroustrup’s zero-overhead principle: You don’t pay for what you don’t use, and if you do use a feature you can’t reasonably code it better by hand. In the C++ language... Read More

DB Seminar [Spring 2020] : Compiling PL/SQL Away

Speaker:

Tanuj Nayak

In this talk, Tanuj Nayak will present Compiling PL/SQL Away from CIDR 2020. This paper details a method of overcoming current overheads of PL/SQL interpretation by compiling it to SQL Common Table Expressions (CTE) using the WITH RECURSIVE construct. Read More

DB Seminar [Spring 2020] : sled and rio – modern database engineering with io_uring

Speaker:

Tyler Neely

sled is an embedded database that takes advantage of modern lock-free indexing and flash-friendly storage. rio is a pure-rust io_uring library unlocking the linux kernel's new asynchronous IO interface. This short talk will cover techniques that have been used to take advantage of modern hardware and kernels while optimizing for long term developer happiness in a complex, correctness-critical Rust codebase.... Read More

[Spring 2020] Aurosish Mishra (Oracle)

Speaker:

Aurosish Mishra

Oracle Database In-Memory - At the heart of multi-model Convergence Aurosish’s team is responsible for all aspects of the data engine for the Oracle Database, ranging from traditional disk-based data accesses and indexing technologies to state-of-the-art distributed in-memory technologies in Oracle's flagship Database In-Memory engine that provides real time analytics at the speed of thought! Currently, they are building Oracle's... Read More