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Welcome to the NuoDB Blog

Sofia Engineering Summit Builds Connections
Apr 17 2019
Martin Gallwey
As the reality of our Sofia office moved from concept (one engineer working from home) to reality (six engineers working together in a real office), it seemed that the time was ripe to have one of our almost-quarterly Engineering Summits in Bulgaria. We still have several open positions there so I felt it was a good opportunity to meet some of our recruitment partners and personally reaffirm our commitment to investing in, and growing, our office there. We believe that the strong engineering talent we are continuing to find in Sofia will
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NuoDB & Temenos at TCF2019: Your On-Ramp to Next-Gen Core Banking
Apr 3 2019
Ariff Kassam
This week we’re excited to join Temenos at the Temenos Community Forum, our first public event since partnering with them in November . Since then we’ve been working closely to deliver the cloud innovation that will help banks migrate their critical applications to the cloud. Global consumer demands are driving organizations to rethink how they architect their systems — today, customers of banks and financial
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Benchmarking Google Cloud Spanner, CockroachDB, and NuoDB
Mar 22 2019
Boris Bulanov
Interested in NuoDB's elastic SQL database and want to know how it all works? Download our white paper on NuoDB's database architecture .
Looking for the next-generation database
As a NuoDB solution architect, I constantly talk to people about what they’re looking for in a database. More and more often, architects and CTOs tell us that they’re building their next-generation data center – often using containers or cloud infrastructure - and they need a database that fits this model.

In their
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Cloud RDBMS architecture cloud architecture Google Cloud Spanner CockroachDB performance benchmark Google Cloud Platform elastic SQL cloud databases next-gen data center database performance
JDBC & Hibernate Package & Version Changes
Mar 5 2019
Ariff Kassam
With NuoDB v3.4 , we changed how we package and version our JDBC and Hibernate drivers.

Previously, we have always versioned and packaged the JDBC and Hibernate drivers with the NuoDB database. This tight coupling with the NuoDB database version has led to a lot of confusion on which driver version to use with which release. Customers assumed that the version shipped with the NuoDB database is the only version that can be used with that database version.

This is not correct. In fact, it hasn’t been
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techblog drivers product release
Deploy the NuoDB Database in Docker Containers
Jan 7 2019
Joe Leslie
At NuoDB , we’ve not only been working hard to improve upon on our distributed SQL database engine, but also to make it easier to adopt NuoDB into CI/CD pipelines. NuoDB is an ANSI standard and ACID compliant SQL database that is suitable for all common deployment models, such as bare-metal, virtual machines, cloud and hybrid-cloud, and most recently container-based environments, such as Red Hat OpenShift Container Platform. At its core, NuoDB is designed to be highly scalable and fault-
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docker Containers install
Distributed Transactional Locks
Nov 13 2018
Martin Kysel
As I explained in a previous blog post , sometimes MVCC is not sufficient and an operation needs to block out all other concurrent modifications. NuoDB is able to lock three types of lockable resources: tables, schemas, and sequences. A resource can either be locked in SHARED mode (which still allows record modification, but no metadata modification) or EXCLUSIVE which prevents any concurrent modification.

EXCLUSIVE access is required for DDL that visits all records (various index operations for
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locks chairman transactions
NuoDB 3.3: Community Edition (CE) on Red Hat OpenShift!
Oct 4 2018
Nuo DB
Try our Community Edition (CE) on Red Hat OpenShift!
We are pleased to announce that with NuoDB v3.3, our leading distributed SQL database is now integrated into Red Hat OpenShift. This enables customers to fully develop, test, deploy and operate applications needing a SQL database fully within OpenShift. OpenShift is Red Hat’s open source container application platform based on the Kubernetes for enterprise application development and deployment.

The NuoDB Community Edition (CE) is a full featured, free to use version of NuoDB, limited to three Transaction Engine (TE
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nuodb 3.3 Community Edition update product release Ephemeral openshift red hat dashboard Containers
How Transaction Locks support Zero Overhead Distributed DML
Sep 25 2018
Martin Kysel
Let us imagine a scenario that needs to prevent MVCC write skews...

One transaction increases the salary of everyone in a department by 10%; another transaction inserts a new employee with a salary X. Since the two transactions do not conflict, MVCC does not prevent either of them from committing. After both resolve, the overall salary in the department could be above the budget. To prevent a similar situation, the application developer might want to have exclusive access to the table.

NuoDB 3.2.2 exposes a new type of lock that guarantees exclusive access to a resource
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table access dml dml transactions locks transactional transactional locks
Why A Chairman Ain't the Master Replica
Jul 12 2018
Martin Kysel
As a distributed, ACID-compliant database, we get a lot of questions about how NuoDB works, and how it compares to more well-known architectures. In particular, people want to understand how NuoDB compares to a master / master architecture, and (related) how we handle lock management. This post will discuss both. We will also discuss when shared-nothing architecture is viable and when conflicting decisions need to coordinated.

In this blog post, we will discuss the concept of Chairmanship, NuoDB's answer to distributed coordination. We will prove that Chairmanship is both
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chairman atom architecture master consistency failure database sharding sharding Database Management
Quick Dive into NuoDB Architecture
Jun 19 2018
Martin Kysel
Introduction
Traditionally, relational databases were designed for scale-up architectures. Supporting more clients or higher throughput required an upgrade to a larger server. Until recently, this meant that implementing a read & write scale-out architecture either required a NoSQL database and abandoning traditional relational database benefits, or relying on sharding and explicit replication. There were no solutions that could scale-out and still provide complete ACID (Atomicity, Consistency, Isolation, and Durability) -compliant semantics. This tension is what inspired the NewSQL
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ACID database scalability atom architecture peer to peer architechure distributed storage durability management

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