April 01, 2015 |

FoundationDB’s Lesson: A Fast Key-Value Store is Not Enough

April 01, 2015

The sale and subsequent closure of FoundationDB cut short something of a grand experiment. FoundationDB, conceived as a Key-Value store, had decided to add flexibility in the form of programming and query-model “Layers” on top of its core KV store. First up was SQL, software that ran on top of core FoundationDB and provided SQL […]

December 15, 2014 |

How Docker Simplifies Distributed Systems Development at VoltDB

December 15, 2014

Working on distributed systems is fun, but not easy! As a software engineer at VoltDB, a big chunk of my time is spent testing software on a cluster of machines as part of new feature development and also for customer issue reproduction. Any software engineer who does this on a daily basis knows this is […]

December 01, 2014 | ,

Simplifying the (complex) Lambda Architecture

December 01, 2014

The Lambda Architecture defines a robust framework for ingesting streams of fast data while providing efficient real-time and historical analytics. In Lambda, immutable data flows in one direction: into the system. The architecture’s main goal is to execute OLAP-type processing faster – in essence,  reduce columnar analytics from every couple of seconds to 100ms or […]

September 01, 2014 | ,

Optimizing Index Performance – A CMU Intern’s Work at VoltDB

September 01, 2014

My name is Yetian Xia. I worked as a software engineering intern at VoltDB during the summer, working with the core team. My favorite project was optimizing the performance of deleting entries from a low-cardinality non-unique tree index. Index  is used to increase the speed of looking up a row, and is heavily used in […]

June 09, 2014 | , ,

Best Practices for Index Optimization in VoltDB

June 09, 2014

Indexes provide a classic “space for speed” trade-off. They add to the persistent memory footprint of your application data but they make query filtering significantly faster. They also represent a trade-off that sacrifices write performance for read performance, on the assumption that indexed data will be filtered by queries more frequently than it is modified. […]

May 07, 2014 |

VoltDB In-Memory Database Achieves Best-In-Class Results, Running in the Cloud, On the YCSB Benchmark

May 07, 2014

The development team at VoltDB recently ran VoltDB v4.2 against the Yahoo Cloud Serving Benchmark (YCSB), an industry-standard performance benchmark for cloud databases. We ran our test on as realistic a cluster setup as possible: commodity hardware that we could easily book as spot instances on EC2, with features like durability and high availability enabled. […]

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