Category: <span>Tech Spotlight</span>

VoltDB Technical Spotlight blog

What’s Missing from Your Fraud Detection Strategy?

Credit card fraud is ever-growing and ever-present. According to the 2016 LexisNexis True Cost of Fraud study, the total cost per dollar of fraud losses has reached $2.40. The total cost of fraud as a percentage of revenue has continued to rise as well, growing 11% from 2015 to 2016. Given status quo, this will [...]
Connecting VoltDB and Amazon Kinesis

Connecting VoltDB to Amazon AWS Kinesis Streams

VoltDB includes interfaces – both import and export – to many other applications and systems in the broader ecosystem of big and fast data, including the cloud. A recent integration, released in VoltDB v6.6, allows system builders to connect VoltDB in either data producer and data consumer roles with Amazon (AWS) Kinesis streaming services. Connections […]

VoltDB Technical Spotlight blog

Tech Spotlight: Top customer questions

We recently received a question from a customer who was looking for a quick way to repurpose some VoltDB production servers to create a disaster recovery site. The customer had a 5-node cluster with a k-safety factor of 2, which means the cluster maintains three synchronized copies of each record, distributed on different nodes in […]

Continuous queries on streams in VoltDB using materialized views

We’ve added a new feature in VoltDB v6.6: support for joins in materialized views. We’re very pleased to share this update with you. Read on for use cases and practical suggestions. Fast data applications rely heavily on DBMSs like VoltDB to provide steady support for many continuous and complex queries returning aggregate and summary data. […]

Accelerating continuous integration with Docker – an intern’s story

Continuous integration (CI) has become a fundamental process in many software-based companies in recent years. Fortunately, frameworks such as Jenkins do most of the heavy lifting and make it flexible for the engineering team to examine and improve the process. With the increasing popularity of lightweight virtualization, CI has begun to embrace technologies like Docker. […]

Getting around the Transparent Huge Pages trap in Linux

A couple of weeks ago, an interesting issue came up in the field. The symptom was that the resident set size (RSS) of the VoltDB process would keep growing when the database was idle. The symptom only manifested itself on Red Hat Enterprise Linux (RHEL) 6.6 in KVM. There was no client workload, not even […]

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

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 […]

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