[DB Seminar] Fall 2015: Prashanth Menon

Speaker:

Prashanth Menon

Modern write-intensive key-value stores have emerged as the prevailing data storage system for many big applications. However, these systems often sacrifice their read performance to cope with high data ingestion rates. Solid-state drives (SSD) can lend their help, but their limited capacity and their peculiar characteristics make their exclusive use uneconomical. Hence, hybrid storage environments with both SSDs and hard-disk... Read More

[DB Seminar] Fall 2015: Round table

Seeing as I've not been able to get a speaker for today, I think we can default to a round table discussion.  I think it would be nice to briefly discuss what we are all working on now, after the WWW/SDM deadlines.  We can additionally discuss the focus of some of the works we submitted to these conferences, if there is interest in that. Next week,... Read More

The Journey from Faster to Better (Igor Canadi + Mark Callaghan)

Speakers:

Igor Canadi , Mark Callaghan

System:

RocksDB

Video:

YouTube

RocksDB has been adapted to a wide range of workloads. Early adopters needed a DBMS for low-latency & high-throughput workloads. Using RocksDB as an embedded DBMS eliminates network latency per request. When using RocksDB with a fast SSD we are able to get more IO throughput compared to other open-source DBMS that we use in production. We continue to get... Read More

Charlie Swanson (MongoDB)

Speaker:

Charlie Swanson

System:

MongoDB

From "How many documents are in my collection?" to "What state has the highest percentage of people living in its most populous city?", there are many questions MongoDB can answer about your data. In this talk, we'll see what sorts of questions can be asked, and how MongoDB finds the most efficient way to answer them. Determining the best way... Read More

[DB Seminar] Fall 2015: Alex Beutel

Speaker:

Alex Beutel

Which seems more suspicious: 5,000 tweets from 200 users on 5 IP addresses, or 10,000 tweets from 500 users on 500 IP addresses but all with the same trending topic and all in 10 minutes?  The literature has many methods that try to find dense blocks in matrices, and, recently, tensors, but no method gives a principled way to score... Read More

DB Seminar [Fall 2015]: more WIN discussion

We'll continue last week's theme of discussing more cool talks from WIN.  Other WIN attendees -- please bring some notes about the talks you liked/didn't like or thought-provoking questions from the workshop. Read More

The Lightning Memory-Mapped Database (Howard Chu)

Speaker:

Howard Chu

System:

LMDB

Video:

YouTube

The Lightning Memory-Mapped Database (LMDB) was introduced at LDAPCon 2011 and has been enjoying tremendous success in the intervening time. LMDB was written for the OpenLDAP Project and has proved to be the world's smallest, fastest, and most reliable transactional embedded data store. It has cemented OpenLDAP's position as world's fastest directory server, and its adoption outside the OpenLDAP Project... Read More

DB Seminar [Fall 2015]: Kijung Shin

Speaker:

Kijung Shin

Given a large graph, how can we calculate the relevance between nodes fast and accurately? Random walk with restart (RWR) provides a good measure for this purpose and has been applied to diverse data mining applications including ranking, community detection, link prediction, and anomaly detection. Since calculating RWR from scratch takes long, various preprocessing methods, most of which are related... Read More

DB Seminar [Fall 2015]: Gene Davis (Splice Machine)

Speaker:

Gene Davis

System:

Splice Machine

In this talk, Gene will discuss Splice Machine, a full RDBMS built on top of Hadoop.  He will describe what makes Splice Machine work and what their team is working on now to make it even more performant on mixed database workloads. Read More

SQLite, A Database for the Edge of the Network (Richard Hipp)

Speaker:

D. Richard Hipp

System:

SQLite

Video:

YouTube

SQLite is a full-featured embedded SQL database engine, and the world's most widely deployed and used database engine. The design and implementation of SQLite is different from most other RDBMSes, since SQLite strives to solve a different problem. This talk describes the problem that SQLite solves and overviews the design choices and algorithms that SQLite uses in its unique role. Read More